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DEN - OPO

$413 Find cheap flights from Denver 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 Denver to Porto departing on 7/30. 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

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These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to Porto.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver 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 Denver to Porto (DEN-OPO)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Denver 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
6:50 pm - 3:25 pmDEN-OPO
14h 35m1 stop
6:00 am - 11:37 pmOPO-DEN
24h 37m2 stops
$619United Airlines
Find Deal
Wed, Oct 30 - Thu, Nov 7
5:25 pm - 11:35 pmDEN-OPO
24h 10m1 stop
1:45 pm - 2:40 pmOPO-DEN
31h 55m1 stop
$637Lufthansa
Find Deal
Wed, Oct 30 - Thu, Nov 7
5:39 pm - 11:35 pmDEN-OPO
23h 56m2 stops
4:20 pm - 2:40 pmOPO-DEN
29h 20m2 stops
$665Lufthansa
Find Deal
Wed, Oct 30 - Thu, Nov 7
9:40 am - 9:45 amDEN-OPO
17h 05m2 stops
12:35 pm - 11:59 pmOPO-DEN
18h 24m2 stops
$869United Airlines
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Wed, Oct 16 - Wed, Oct 23
10:43 am - 3:30 pmDEN-OPO
21h 47m2 stops
9:15 am - 3:35 pmOPO-DEN
13h 20m1 stop
$884Delta
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Tue, Sep 24 - Wed, Oct 9
5:45 pm - 3:30 pmDEN-OPO
14h 45m1 stop
9:15 am - 10:49 pmOPO-DEN
20h 34m2 stops
$889Delta
Find Deal
Sun, Sep 22 - Wed, Oct 9
4:39 pm - 3:55 pmDEN-OPO
16h 16m2 stops
12:20 pm - 11:59 pmOPO-DEN
18h 39m2 stops
$930Iberia
Find Deal
Thu, Aug 15 - Thu, Aug 22
6:35 pm - 7:35 pmDEN-OPO
18h 00m1 stop
10:15 am - 11:29 pmOPO-DEN
20h 14m2 stops
$960British Airways
Find Deal
Mon, Sep 23 - Thu, Oct 10
4:39 pm - 3:55 pmDEN-OPO
16h 16m2 stops
12:25 pm - 11:59 pmOPO-DEN
18h 34m2 stops
$1,037Iberia
Find Deal
Wed, Aug 14 - Wed, Aug 21
6:35 pm - 7:35 pmDEN-OPO
18h 00m1 stop
10:35 am - 11:29 pmOPO-DEN
19h 54m2 stops
$1,177British Airways
Find Deal
Mon, Sep 23 - Sat, Oct 12

Flights from Denver to Porto - Travel Insights & Trends

Get data-powered insights and trends into flights from Denver 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 Denver to Porto?

The average price of all flights from Denver to Porto clicked on KAYAK for each day over the last 12 months.
If your flying dates are flexible, you should consider flying to Porto on a Thursday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from Denver to Porto. For your return ticket, we recommend flying on a Monday and avoiding Saturdays for the best deals.

What is the cheapest month to fly from Denver to Porto?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Denver 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 Denver to Porto is January, where tickets cost $504 on average. On the other hand, the most expensive months are May and June, where the average cost of tickets is $1,598 and $1,543 respectively.

How far in advance should I book a flight from Denver to Porto?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Denver 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 Denver to Porto, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 12 days before departure.

Which airlines provide the cheapest flights from Denver to Porto?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 3 days, United Airlines offered the best one-way deal for that route, at $805. KAYAK users also found Denver to Porto round-trip flights on United Airlines from $619 and on Lufthansa from $637.

Good to know

Low season

February

High season

October

Cheapest flight

$413
Best time to beat the crowds with an average 40% drop in price.
Most popular time to fly and prices are also 3% lower on average.
Flight from Denver to Porto

When to book flights from Denver to Porto

Are your dates flexible? Find out the best times to travel from Denver 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 Denver to Porto

  • What is the cheapest flight from Denver to Porto?

    In the last 3 days, the lowest price for a flight from Denver to Porto was $413 for a one-way ticket and $619 for a round-trip.

  • Do I need a passport to fly between Denver and Porto?

    Yes, you’ll need a passport to travel to Porto from Denver.

  • Which airports will I be using when flying from Denver to Porto?

    When flying out of Denver you will be using Denver Intl. You will be landing at Porto, also known as Porto.

  • Which aircraft models fly most regularly from Denver to Porto?

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

  • Which airline alliances offer flights from Denver to Porto?

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

  • Which is the best airline for flights from Denver to Porto, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Denver to Porto are Delta and United Airlines. With an average price for the route of $1,050 and an overall rating of 8.0, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $1,289 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Denver 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 Denver to Porto.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Denver to Porto?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto from Denver 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 Denver 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 Denver with another airline. Booking your flights between Denver and OPO can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Denver 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 Denver up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top 5 airlines serving from Denver to Porto

 
See real verified KAYAK customer reviews for airlines flying from Denver 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 Denver 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
7.9Comfort
8.2Boarding
8.0Entertainment
7.4Food
8.6Crew
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.

No real agent onsite helping you for missing luggage there. Not like the other airline next to UA desk, they have staff attending in their desk assisting answer/helping luggage issue, even after midnight.

Not worth the premium paid for the first class ticket

We liked the fully reclinable seats. Had center seats, so it was difficult to talk to spouse. Crew was great

Fine. Though no food or entertainment so the survey needs to be updated with those options.

This was a flight operated by Lufthansa. See me prior comments, which were meant for this experience. The CSA, Ashley, should be reprimanded if not fired for incompetence, being rude, and very, very slow. She was whispering to other CSAs, blaming my flight change on others, unable to give me a seat assignment, telling me could not help without offering any advice (I travel 200,000 miles a year and am a consultant to the airlines, so I know how this gets done PRETTY DAMN WELL). Then, she gave me literally the worst seat on the airline (yes, there were other seats open) - the one right next to the bathroom that was so bad the other PAX next to me left to move to another seat. My seat kept getting rammed (3x) by the crew with their carts (no turbulence to speak of), other passengers grabbing the seat to get in or out of the bathroom, and listening to the bathroom flush all night.

Generally good but there wasn’t any staff available when my luggage didn’t appear at baggage claim in Fresno. It took about half an hour to locate a staff member to open up the locked room where it was being kept.

Flight delayed from Cape Town to Washington then got diverted to miami and in miami we had to fend for ourselves , im still trying to get to Shreveport now

I just wrote a text which was supposed to be for the flight from Denver to spokane not Frankfurt to Denver.

Good dinner and nice plane.Smootz flight. Breakfast had no sweet option. Seats hardly reclined.

Too many fees (but that seems to apply to all airlines nowadays)

Iberia canceled then rescheduled the first leg of this flight three weeks before my trip left on May 11. I had to cancel and get a refund. And scramble to find a different flight through a travel agency flying on United. And Kayak , you’ve been writing me ever since as if I’m still on this original flight! Pretty scary you have no way of knowing what has befallen your customers! I will never buy plane tix from you again!

As an advantage member I found the experience very positive

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.

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.

Our flight was delayed by 2-hrs but I understand it was beyond the scope of the crew members

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

Booked with Iberia but flight was with Level. This switch of airlines was not published anyware and I was not made aware. Service was horrible, attendants were rude and nowhere to be found. Interior of plane was disgusting and dirty, trash on the floor, bathrooms were dirty (probably because flight attendants were not collecting trash from passengers). I have never encountered this on any other flight or airline. A public bus or metro in Los Angeles is 10 times cleaner. Had I known this was not an Iberia flight I would not have booked this tickets.

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

United delayed the flight to assist customers to make the connection. The Ohara customs area was overwhelm which created an issue for customers trying to make the Little Rock connection. The delayed allow several customers to make the final flight into Little Rock.

Missed our flight to London and we were put on coach seats to Munich.

Terrible. Missed our flight to Newark as well as our flight to London. Complete disaster

They canceled our flight last minute and we had to get another flight with twice the cost

Dinner was excellent - beef stew, the eggs for breakfast were only ok. It was soooo nice that there were so many options for movies and games.

Captain waited 45 minutes for late passengers boarding from Washington DC to Munich which was nice for them but caused our luggage to miss boarding our connection on to Bucharest. We then did not receive our luggage for about 48 hours after landing which was very inconvenient for our travel.

Poor, we had 1 hour to grab our checked luggage, go through customs, recheck bags and run across terminals to make our United flight. Poorly planned connections.

Check in in Albuquerque was awful. The people were great but they were over loaded. The procedures were terrible. We got through fine but it took 90+ minutes.

Will try to not fly with them again. Delays because of weather but got redirected to an airport where I could not make connection.

Staff didn’t care in business class. Closed the door on my mom while she was on the jetbridge and flight attendant told me she would make it from the connecting flight. They lied. My luggage was damaged on arrival. No success in filing damage claim.

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 Denver to Porto

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Denver to Porto found on KAYAK in the last 72 hours.
7/30Tue
2 stops
30h 40mDEN-OPO
$413
8/1Thu
2 stops
25h 56mDEN-OPO
$466
7/30Tue
3 stops
32h 20mDEN-OPO
$470
8/31Sat
2 stopsUnited Airlines
30h 06mDEN-OPO
$805
8/21Wed
1 stopLufthansa
24h 15mDEN-OPO
$813
7/31Wed
1 stopSWISS
31h 00mDEN-OPO
$827
9/6Fri
1 stopSWISS
31h 05mDEN-OPO
$856
8/31Sat
1 stopLufthansa
24h 15mDEN-OPO
$876
9/16Mon
2 stopsAmerican Airlines
23h 40mDEN-OPO
$1,231
8/30Fri
2 stopsAmerican Airlines
23h 40mDEN-OPO
$2,165

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Last minute flights from Denver 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 Denver to Porto that are departing in the next 10 days.
6/14Fri
multi-stop
33h 40mDEN-OPO
6/16Sun
multi-stop
28h 00mOPO-DEN
$5,503
6/14Fri
multi-stop
17h 40mDEN-OPO
6/16Sun
multi-stop
18h 46mOPO-DEN
$6,259
6/14Fri
multi-stopLufthansa
24h 15mDEN-OPO
6/16Sun
multi-stopLufthansa
27h 50mOPO-DEN
$7,460
6/13Thu
multi-stopAmerican Airlines
23h 40mDEN-OPO
6/16Sun
multi-stopAmerican Airlines
18h 39mOPO-DEN
$10,634

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Denver - Porto Flights

Departure:

Denver (DEN)United States

Destination:

Porto (OPO)Portugal

Return flight deals:

Porto - Denver

Cabin classes:

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