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WAS - OPO

$260 Find cheap flights from Washington, D.C. to Porto

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Washington, D.C. to Porto departing on 8/18. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Thu 7/11
Thu 7/18

Search hundreds of travel sites at once for deals on flights to Porto

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Porto.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Porto.
In the last 7 days travelers have searched 44,212,782 times on KAYAK, and here is why:

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Cheap flight deals from Washington, D.C. to Porto (WAS-OPO)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Washington, D.C. to Porto that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
10:20 pm - 12:30 amIAD-OPO
21h 10m1 stop
10:55 pm - 8:20 pmOPO-IAD
26h 25m1 stop
$401TAP AIR PORTUGAL
Find Deal
Wed, Aug 14 - Wed, Sep 4
10:20 pm - 3:00 pmIAD-OPO
11h 40m1 stop
11:50 am - 7:40 pmOPO-IAD
12h 50m1 stop
$402TAP AIR PORTUGAL
Find Deal
Wed, Aug 14 - Wed, Sep 4
6:45 pm - 10:50 amIAD-OPO
11h 05m1 stop
11:45 am - 7:25 pmOPO-IAD
12h 40m1 stop
$422Delta
Find Deal
Sat, Nov 30 - Fri, Dec 6
6:45 pm - 10:50 amIAD-OPO
11h 05m1 stop
5:00 am - 3:45 pmOPO-IAD
15h 45m1 stop
$425Delta
Find Deal
Thu, Nov 14 - Sat, Nov 23
5:35 pm - 11:25 amIAD-OPO
12h 50m1 stop
11:45 am - 7:25 pmOPO-IAD
12h 40m1 stop
$435KLM
Find Deal
Sun, Nov 10 - Fri, Nov 15
5:35 pm - 7:20 pmIAD-OPO
20h 45m1 stop
5:00 am - 3:45 pmOPO-IAD
15h 45m1 stop
$437KLM
Find Deal
Wed, Nov 13 - Sat, Nov 23
5:30 pm - 11:45 amDCA-OPO
13h 15m2 stops
12:25 pm - 11:02 pmOPO-DCA
15h 37m2 stops
$523Iberia
Find Deal
Tue, Jul 30 - Wed, Sep 11
7:49 pm - 4:05 pmDCA-OPO
15h 16m2 stops
12:25 pm - 11:34 pmOPO-DCA
16h 09m2 stops
$524British Airways
Find Deal
Wed, Nov 20 - Wed, Dec 11
7:49 pm - 4:05 pmDCA-OPO
15h 16m2 stops
8:20 am - 11:34 pmOPO-DCA
20h 14m2 stops
$544British Airways
Find Deal
Wed, Nov 20 - Mon, Dec 9
10:45 pm - 7:35 amIAD-OPO
27h 50m2 stops
8:15 am - 7:15 pmOPO-IAD
16h 00m1 stop
$566Iberia
Find Deal
Fri, Sep 20 - Sat, Sep 28

Flights from Washington, D.C. to Porto - Travel Insights & Trends

Get data-powered insights and trends into flights from Washington, D.C. to Porto to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Washington, D.C. to Porto?

The average price of all flights from Washington, D.C. to Porto clicked on KAYAK for each day over the last 12 months.
When flying from Washington, D.C. to Porto, you should consider leaving on a Monday and avoid Thursdays if you are looking for the best rates. For your return to Washington, D.C., you’ll find the best rates on Thursdays and the most expensive ones on Fridays.

What is the cheapest month to fly from Washington, D.C. to Porto?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Washington, D.C. to Porto, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Washington, D.C. to Porto is January, where tickets cost $422 on average. On the other hand, the most expensive months are June and May, where the average cost of tickets is $836 and $826 respectively.

How far in advance should I book a flight from Washington, D.C. to Porto?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Washington, D.C. to Porto, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Washington, D.C. to Porto, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 17 days before departure.

Which airlines provide the cheapest flights from Washington, D.C. to Porto?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
The best deals for a one-way ticket found by KAYAK users over the last 3 days were on TAP AIR PORTUGAL ($260) and PLAY ($362). The cheapest round-trip tickets were found on TAP AIR PORTUGAL ($401) and Delta ($422).

Good to know

Low season

January

High season

July

Cheapest flight

$260
Best time to beat the crowds with an average 32% drop in price.
Most popular time to fly with an average 33% increase in price.
Flight from Washington Dulles Airport to Porto

When to book flights from Washington, D.C. to Porto

Are your dates flexible? Find out the best times to travel from Washington, D.C. to Porto based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Washington, D.C. to Porto

  • Which other nearby cities are served by Porto Airport (OPO)?

    Porto Airport (OPO) is the main international airport serving the city of Porto. You can explore several nearby cities within an hour's drive from OPO. The nearby cities are Braga, Guimaraes, and Aveiro. You can get to these cities using either buses, taxis, or car rentals from the airport (OPO). Car rentals, however, provide a more flexible means of transport from the airport to these cities.

  • Which airlines offer family services on trips between Washington and Porto?

    United Airlines, TAP Air Portugal, American Airlines, and Delta Airlines are family-friendly due to their spacious seating options, including extra legroom and seating arrangements designed for families. Furthermore, they feature kid-friendly menus, including meals and snacks, and in-flight entertainment to keep the kids engaged until their arrival in Porto.

  • Which eco-friendly practices do airlines use when flying from Washington and Porto?

    The average carbon emission per passenger on the Washington to Porto route is approximately 6865 lb. However, you can fly sustainably with TAP Air Portugal. The airline operates flights that produce 43% less carbon dioxide per passenger on this route. TAP Air Portugal is committed to blending SAFs into their jet fuel supply, which helps to significantly reduce greenhouse gas emissions associated with their flights. They have also implemented recycling programs on board their flights, encouraging passengers to separate and dispose of recyclable waste appropriately.

  • Can I rent a car at Porto Airport (OPO)?

    Yes, you can rent a car at OPO. OPO has a variety of car rental providers onsite, including Avis, Budget, Europcar, Hertz, Sixt, and Thrifty. Upon arrival at the airport, you will find the car rental providers' desks conveniently located in the arrivals area. These providers offer a wide selection of vehicles, including economy cars, sedans, and SUVs.

  • What is the cheapest flight from Washington, D.C. to Porto?

    In the last 3 days, the lowest price for a flight from Washington, D.C. to Porto was $260 for a one-way ticket and $401 for a round-trip.

  • Do I need a passport to fly between Washington, D.C. and Porto?

    Yes

  • Which airports will I be using when flying from Washington, D.C. to Porto?

    On your way to Porto, you’ll fly out from one of these Washington, D.C. airports: Washington, D.C. Reagan-National or Washington, D.C. Dulles Intl. You’ll be landing at Porto.

  • Which aircraft models fly most regularly from Washington, D.C. to Porto?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Washington, D.C. to Porto?

    Star Alliance, oneworld, and SkyTeam are the airline alliances operating flights between Washington, D.C. and Porto, with Star Alliance being the most commonly used for this route.

  • What is the most popular layover when flying to Porto from Washington, D.C.?

    Lisbon is the most popular layover city among KAYAK users traveling from Washington, D.C. to Porto.

  • Which is the best airline for flights from Washington, D.C. to Porto, Delta or KLM?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Porto are Delta and KLM. With an average price for the route of $574 and an overall rating of 8.0, Delta is the most popular choice. KLM is also a great choice for the route, with an average price of $565 and an overall rating of 7.8.

  • How does KAYAK find such low prices on flights from Washington, D.C. to Porto?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington, D.C. to Porto.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington, D.C. to Porto?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto from Washington, D.C. is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Washington, D.C. to Porto?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Porto with an airline and back to Washington, D.C. with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington, D.C. to Porto?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Porto from Washington, D.C. up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding a cheap flight from Washington, D.C. to Porto

  • Dulles International Airport (IAD) is the hub for United Airlines, and if you are traveling with this airline from Washington, D.C., to Porto, you will depart from Terminal D. United Airlines operates most international flights from Terminal D while operating domestic flights from Terminal C.
  • Parents of Unaccompanied Minors flying from Washington (DCA) to Porto should consider booking them on American Airlines. Unaccompanied Minors between the ages of 5 and 14 years old are accepted by American Airlines at DCA. The minors receive a wristband at check-in with their flight information, and a customer service representative monitors them while accompanying them to the gate.
  • If you intend to take the Metro subway to the airport, you can get to either Reagan-National (DCA), which is connected to the Metro's Blue and Yellow Lines, or Dulles International (IAD), which is connected to the Metro's Silver Line.
  • If you’d like to upgrade your TAP Air Portugal Economy seat when flying from Washington to Porto, consider upgrading your Economy ticket to either EconomyXtra or Executive Cabin for a fee. EconomyXtra and Executive cabins provide passengers with additional legroom, wider seats, an additional baggage allowance, and enhanced in-flight services.
  • When departing from IAD, at least one VIP lounge is in each concourse. Concourse A has Air France-KLM, Etihad, and Virgin Atlantic lounges. Concourse B houses the British Airways lounge, the Lufthansa lounge, and Turkish Airlines amenities. In Concourse C, there are three United Club lounges, one United Polaris lounge, and one United Club lounge in Concourse D.
See more tips

Top 5 airlines serving from Washington, D.C. to Porto

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Porto. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Washington, D.C. to Porto? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
DeltaOverall score based on 10277 reviews
7.4Food
7.9Comfort
8.6Crew
8.2Boarding
8.0Entertainment
Airline reviews

3 hours late and all they have is was a $12 meal voucher. That’s not even enough to cover fast food.

2.0 MediocreCraig, Jun 2024CVG - LGA
Read more about Delta reviews

3 hours late and all they have is was a $12 meal voucher. That’s not even enough to cover fast food.

Among the poorest flights I’ve had with Delta in a while. Entertainment system failed completely on a 7.5 hr flight. Crew seemed distracted and not the normal friendly crew. Flight overbooked it seemed… very crowded.

If I can, I always fly Delta. I’ve found their service to always be reliable and pleasant.

You could have not cancelled the flight (AA, which I will be flying from now on) left for BOS despite the fictitious weather issues (that no one in my Boston family could see). You could have rebooked my direct flight to another direct flight instead of sending me though JFK, the worst US airport after O’Hara You could have rebooked me on a Main Cabin seat (like the one I paid for in my original ticket instead of putting me a the last row on JFK->BOS leg, pocketing the difference in ticket price But I do not really care whether you will ever do that in a future because in a future neither I nor anyone from my company (unless they pay out of pocket) nor an of my clients and partners (if they heed my advice) will ever be caught dead on any of Delta flights

Really bad baggage handling. Had my Rimowa bag badly damaged at the latches.

It was pretty good I was worried with the short Layover that I might not catch my connection but the gate was there

It was good until there was a 3 hour delay because there was not any pilots to fly the plane.

There was plenty of overhead room but half of the passengers were told they had to check their carryon bags. My partner and I checked in as early as possible and our seats were split across the aisle.

Friendly flight attendants. Comfort plus seats were very comfortable and had lots of leg room. 10A and 10 B.

I've flown many many times on Northwest and then Delta. The crew on this flight were absolutely the best I've had the pleasure of being looked after by.

We left one hour late because of technical difficulties. The economy comfort seats are great for the price. The crew was mediocre, they do not provide a pleasant experience, they just deliver food and drinks and give orders, not very amicable, no service and hospitality focus.

Booked connecting flights with KlM. My serving flight was the furthest part of the airport. On arrival in Zurich. My two cases arrived but only one carry on belong to my son. His three suitcase didn't arrive. After enquiring we discovered they were still in Amsterdam. We landed at 11.12. We eventually left the airport just after one.

I thought KLM was the best airline but the Lima - Amsterdam was 1 hours late, the Brussels - Amsterdam was 2.30 hours late and the Amsterdam - Lima was 30 minutes late

no issues at all... Kudos to the food. This time was really really good

Overall a good experience. We were disappointed when we had to check our carry on due to the plane being full. KLM hadn’t notified us and we had valuable items in the carry on but they still made us check it. Some of the food was great and some was mediocre. Crew is really kind and funny.

One of the vstewardeses wanted to bump me of the plane for absolutely nothing. There is CCTV in the plane ans everything can be verified. Very disappointing , you all will see, o other 5 years and the passangers who does not smile to flight attendent will be bumped off...

It was nice to be on a legacy airline, people try at least.

I travel frequently. The flight was late again... KLM should really try and be on time

The flight itself it was great nice food the crew were very nice and helpful, Checking in from Birmingham wasn't great long queues for bag dropped, And I had my hand luggage case taken away from me even though I requested to have it with me as I had breakables items. I was told I can not because of the length of the flight with no explanation at all no options was given for me to take my fragile items out of my case it was taken away with hold buggage I find the staff member who was checking me in very unpleasant !! Can we please be advise if the rules have changed about the the carry on hand luggage it will be easier to be advise on booking your tickect if we not allowed to take the hand luggage with me. Overall I had a good flight .

The plane was clean and the staff was friendly. Food and drinks as expected on international flights. The entertainment system was old style, with a pullout controller, and selections not as extensive as on other flights.

The flight from Amsterdam to Dallas was great, ok food, good service, great entertainment. But Dallas to SF was very tiring because of two hour delay inside the airplane waiting for AA paper work in 99 degrees in the sun. We had no oxygen and the pilot had to ask everyone to blast the AC because it was getting too hot inside the cabin.

Our luggage did not make it with us despite the fact that there was an hour between landing in Madrid (from Granada) and the departure of the plane to Washington DC. We received notifications about this, which is a nice touch, but they were in Spanish and it took us a while to figure out what the message was. Furthermore, the process of filing a report was not intuitive and we have received no e-mail or other form of confirmation that the airline has received our missing luggage reports. Needs improvement!

Flight home was great. But, as should have been expected, Newark Liberty airport sucked.

We left our child’s tablet on our seat 12 B on the plane and we can’t get a hold of anyone to try to get help locating the tablet.

My flight was cancelled after a 7 hour delay. I am awaiting a refund.

Ability to select seating would be nice. We were family of three and they had us seated back to back and one of us on the other side of the plane??? That is pretty goofy. Especially when tickets were placed two months in advance.

I am quite satisfied. The flight was on time and landed early. Staff was friendly.

Needed more info on connecting flight. Late flight made very short connection. Lost luggage that we still do not have!

Seats comfortable on economy plus and attendants very helpful. Food was ok. Bathrooms needed servicing.

Original flight was cancelled - After waiting 2 hours for new take-off times. Then had to stand in line for 3 hours, ending at 2:30 am - to be told, " No hotel rooms anywhere in Dallas". No way for me to get any rest at DFW at that time of night.

45 min late. Priority is not a priority as they put everyone in the same bus a than priority become last.

The check in process was terrible. Took a long time to check in because there is not enough agents. Once we got to gate, no announcement to board, all of a sudden people got up and board. The seats were EXTREMELY UNCOMFORTABLE. It was a 3 hours international flight, and we were served one tiny cup of water. 😩😩 The temperature was so hot inside rhe plane we thought we were sitting in an oven. Very difficult to find a flight attendant for assistance. They ran up and down aisle to serve first class but never really look up to seve the rest of the flight. I would never fly on this airline again. The experience was horrible.

What didnt i like? You had to pay for seats after the booking was paid for. If i knew that beforehand i would have booked with emirates for a few dollars more

Most important was the effciency - on-time take-offs and landings, no missed connections, baggage arrived correctly. Friendly & professional crew. Less important was food/drink. Pretty spartan, but we'll know next time and bring our own stuff.

Great airline, new, comfortable and quiet planes. Plenty of leg room and state of the art entertainment system. The big downside is the connection in Lisbon. The airport is small and a bus is needed from the plane to the terminal. Is a mess, takes a lot of time, nobody gives an explanation, boarding zones are not honored, etc.

I thought Miami's airport was very disorganized during the Boarding.

Very efficient boarding - other airlines could learn from them. Friendly, efficient crew. Red eye flight, so dinner meal was irrelevant. Breakfast could have been more substantial. Seats reasonably comfy.

People seated in exit rows should have designated overhead space

I have been flying internationally for most of like. My first trip with TAP- wonderful! I look forward to flying with them more frequently in the future!

Larger seats on this plane made the ride reasonably comfortable. Our next flight, from Lisbon to Copenhagen, was inconsiderately tight and stressful. The seats were smaller, space between rows was very limited (no button or mechanism to even slightly incline anyone’s seat), and leg-cramping under the seat in front. Just like sardines in a can. Really felt for all the tall Danes on the flight. Their knees were pressed against the seat in front throughout the flight.

Economy class has no legroom so if you have the money worth to upgrade! Food was absolutely horrible! The crew was super nice!!!!!

The flight was provided by Aer Lingus and our seats were in a poor condition (15A & 15C). They looked like they needed repairing/replacing and were uncomfortable for such a long flight. Also the arm rests on Aer Lingus planes do not lift more than around 45 degrees, instead of the usual 90 degrees upright, meaning you cannot maximum the space between you & your travel companion so as to be more comfortable for such a long flight.

Flights were actually with Aer Lingus outward and American Airlines & Aer Lingus on the return journey. Outward flight with Aer Lingus was good but the return flight with them was not so good as our seats were in a poor condition (15A & 15C) and looked like they needed replacing! The American Airlines flight from Miami to JFK New York was good and the seats were very comfortable and spacious (32D & 32E)

Awful. Delay, lost vacation time and travel time now more than 24h

Awful. Flight delayed and we missed our long flight to Rome. It has been a nightmare and we have still not arrived. It was NOT a weather delay, just poor planning by AA

Boarding was as fast and efficient as possible. The flight crew were amazing and extremely friendly. We enjoyed our flight.

Very bed boarding, there was overbooked and make a lot of problems and noises

There was a problem in the luggage because there were not porters

On my way from Chicago to London, I was seated next to a quite heavy passenger. I could barely move. BA should have ensured that overweight customers are placed in comfortable seats and not to penalize also other passengers because BA is not willing to accommodate these passengers and their needs. No respect at all.

The flight as far as timings go was excellent. Unfortunately we ended up sat with someone on a night flight who had been drinking alcohol before boarding and BA staff were happily serving him more alcohol. He was very drunk which made our flight uncomfortable and awkward. My partner had this person lying on him whilst asleep. Alcohol should be served minimally. If there had been an emergency this person would not have been in a fit state to act accordingly.

Book cheap flights from Washington, D.C. to Porto

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Washington, D.C. to Porto found on KAYAK in the last 72 hours.
8/18Sun
1 stopTAP AIR PORTUGAL
21h 10mIAD-OPO
$260
7/21Sun
1 stopTAP AIR PORTUGAL
21h 10mIAD-OPO
$292
7/15Mon
1 stopTAP AIR PORTUGAL
21h 55mIAD-OPO
$293
9/23Mon
2 stopsBritish Airways
21h 35mDCA-OPO
$472
11/13Wed
2 stopsDelta
17h 29mBWI-OPO
$473
9/23Mon
2 stopsIberia
27h 50mIAD-OPO
$473
7/21Sun
2 stopsAir France
17h 20mIAD-OPO
$532
8/19Mon
2 stopsDelta
17h 34mIAD-OPO
$539
8/4Sun
2 stopsAir France
17h 20mIAD-OPO
$562
11/17Sun
2 stopsIberia
13h 50mDCA-OPO
$1,113

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Last minute flights from Washington, D.C. to Porto

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Washington, D.C. to Porto that are departing in the next 10 days.
6/16Sun
multi-stop
38h 55mIAD-OPO
6/24Mon
multi-stop
27h 07mOPO-IAD
$974
6/16Sun
multi-stopSWISS
16h 30mIAD-OPO
6/24Mon
multi-stopSWISS
26h 00mOPO-IAD
$987
6/13Thu
multi-stop
19h 55mIAD-OPO
6/16Sun
multi-stop
27h 05mOPO-IAD
$1,022
6/13Thu
multi-stop
19h 55mIAD-OPO
6/16Sun
multi-stop
27h 05mOPO-IAD
$1,024
6/14Fri
multi-stop
19h 36mIAD-OPO
6/17Mon
multi-stop
32h 20mOPO-IAD
$1,092
6/14Fri
multi-stopUnited Airlines
26h 15mIAD-OPO
6/16Sun
multi-stopUnited Airlines
18h 45mOPO-IAD
$1,266
6/14Fri
multi-stopUnited Airlines
10h 50mDCA-OPO
6/16Sun
multi-stopUnited Airlines
33h 17mOPO-DCA
$1,305
6/14Fri
multi-stopAir Canada
24h 06mDCA-OPO
6/16Sun
multi-stopAir Canada
33h 17mOPO-DCA
$1,496
6/16Sun
multi-stopAir Canada
20h 05mDCA-OPO
6/24Mon
multi-stopAir Canada
18h 40mOPO-DCA
$1,704
6/13Thu
multi-stopBritish Airways
31h 15mBWI-OPO
6/16Sun
multi-stopBritish Airways
28h 00mOPO-BWI
$13,095

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Flights to Porto

Destination:

Porto (OPO)Portugal

Return flight deals:

Porto - Washington, D.C.

Cabin classes:

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