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Find cheap flights from Seattle to Portugal from $324

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Portugal departing on 9/30. 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
Sat 6/15
Sat 6/22

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Best Portugal Flight Deals

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

Lisbon
Lisbon2 stops$651
Porto
Porto2 stops$667
Ponta Delgada
Ponta Delgada1 stop$994
Funchal
Funchal1 stop$1,151
Faro
Faro2 stops$1,026
Lajes
Lajes2 stops$978

Good to know

Low season

January

High season

September

Cheapest flight

$324
Best time to beat the crowds with an average 33% drop in price.
Most popular time to fly with an average 11% increase in price.
Flight from Seattle to Lisbon

FAQs - booking Portugal flights

  • Is it necessary to get a visa before flying from Seattle to Portugal?

    Since Portugal is a part of the Shenzhen area, there's no need to get a visa if you don't plan on staying for more than 90 days in this country or any other country in the area. It is important to remember to bring a valid passport that will remain valid for at least 90 days beyond your intended date of departure from Portugal.

  • What is the quickest way to get to Lajes Airport (TER)?

    You can travel on a one-stop flight that utilizes Alaska Airlines and Azores Airlines to go to the airport from Seattle Tacoma International Airport with a layover at Boston Logan International Airport. You can also utilize Delta Air Lines or JetBlue to make the trip between Seattle and Boston.

  • Is there anything for kids to do at the airport in Seattle before a flight?

    One of the best options to entertain kids during their stay at the airport before a flight to Portugal is to take them to the children's play area that has a location right across from the Seattle Taproom that you will find between the Central Terminal and the A gates at the airport. Most days at the airport, there's also something called City of Music that consists of live music performances that occur throughout the airport property.

  • What makes a good choice for a sustainable airline on this route?

    TAP Air Portugal has made sustainability a top priority, with a focus on reducing carbon emissions and promoting environmentally friendly practices. The airline is committed to investing in new, more fuel-efficient aircraft and has implemented a number of initiatives to reduce waste and promote recycling. TAP Air Portugal has also been recognized for its efforts in sustainability, including receiving the Eco-Innovation Award from the European Union in 2015 and being named the Most Efficient Airline in Europe by Air Transport World in 2018.

  • How does KAYAK find such low prices on flights from Seattle to Portugal?

    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 Seattle to Portugal.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Portugal from Seattle 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 Seattle to Portugal?

    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 Portugal with an airline and back to Seattle with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Portugal?

    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 Portugal from Seattle 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 cheap flights to Portugal

  • Morning departure is around 10% more expensive than an evening flight, on average*.
  • One of the most frequent airport destinations in Portugal is the Humberto Delgado Airport (LIS). From Seattle Tacoma International Airport (SEA), one route choice is to travel on a one-stop flight aboard American Airlines with a layover at Philadelphia International Airport (PHL).
  • When you are looking for one of the quickest ways to get to Francisco Sá Carneiro Airport (OPO) from Seattle Tacoma International Airport, you can travel on a one-stop flight on Air Canada and Air Transat that has a layover at Montréal-Pierre Elliott Trudeau International Airport (YUL).
  • If your flight from Seattle Tacoma International Airport is aboard British Airways, you will find that this airline has a lounge location in the south satellite of the airport.
  • Travelers looking for the quickest way to make their way to Faro International Airport (FAO) from Seattle Tacoma International Airport will find that the one-stop flight or a combination of Air Canada and Air Transat that has a layover at Toronto Pearson International Airport (YYZ) is one of the best options.
  • When your goal is to reach the Aeroporto João Paulo II (PDL) from Seattle Tacoma International Airport, one option is to travel on a one-stop flight that utilizes Air Canada and Azores Airlines with a layover at Montréal-Pierre Elliott Trudeau International Airport.
See more tips
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

Top 5 airlines serving from Seattle to Portugal

 
Need help choosing which airline to fly with from Seattle to Portugal? 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 10673 reviews
8.0Entertainment
8.2Boarding
7.9Comfort
7.4Food
8.6Crew
Airline reviews

The plane from SNA wouldn’t start after 5 tries. The team gave me an option of flying direct from LAX and giving me a Lyft ride there! Perfect!

10.0 ExcellentSash, May 2024SEA - HNL
Read more about Delta reviews

The plane from SNA wouldn’t start after 5 tries. The team gave me an option of flying direct from LAX and giving me a Lyft ride there! Perfect!

Had a broken tray in business class. Crew just shrugged it off.

Everything was great except for the seat. The backrest would not stay in the upright position.

public website still broken for years randomly blocking browsers with privacy options active after loading a page maybe once. check-in on laptop was almost impossible but eventually randomly worked. had to print pass at airport since couldn't get back in to load digital pass on mobile firefox or chrome. red eye flight so smooth onboarding, plenty of room to spread out, easy offboarding. onboard wifi instructions mention vpn can cause problems connecting but fails to also mention private dns. no printed or built in menu list, seems weird to require personal device to point at qr code link for menu which does not even allow direct ordering. people with health condition risk related dietary restrictions trying to avoid for example cholesterol and sugar are left guessing what they can order either way without nutritional info highlights (cranberry juice was minute maid cocktail with as much suger as typical can of soda). tap to pay wasn't working and always seems sketchy to manually enter card info. good movie variety, so limited tv was okay.

Bag drop off was slow and annoying. Only 2 agents at the entire delta desk, and no one directing traffic for what line to be in, many confused people slowed down the process. Boarding was fine. Seats in Delta comfort plus were fine. Snacks were great! Definitely a bonus. The entertainment system was awful — old, slow, not responsive, and completely unable to play games due to some kind of error. But on the other hand, thank you to Delta for the free WiFi. That made it better.

Flight diverted in SD. Later take off in Seattle by 1.3hrs

Mi primera conexión se retrasó por lo cual perdí mi segunda conexión la cual salió adelantada

Crew was not friendly when I went to request a seat change.

There were choices for the snacks. Good choices and tasty lunch and breakfast as well.

The flight crew was amazing. I’m very tall and they moved me to an exit row unsolicited!!! Amazing service.

My only issue was my meal was inedible except for the sides.

Medíocre. The food wasn't good (although not bad, bad) and the staff wasn't kind. I asked for n extra blanket, the steward never came back, serving us roughly.

Excellent apart from transport to actual plane 10 minutes from the actual gate , walking out in the tarmac in the rain and having to climb stairs to enter while holding luggage.

Boarding was smooth and on time. The seat was comfortable and the entertainment worked. Staff were gracious.

Business class in the second leg - CDG-EVN was a disaster.

worst experience ever i choose my seat in advance and also have my seat selected in my boarding and the they told me that my seat has been changed without notify me

No birding was given for next trip on same carrier, food was very moderate.

We transited through Chad and what was supposed to be a 1hr 20 minutes transit time lasted over 4hrs. We didn't get regular updates until we complained. After a 10hr flight from Paris no form of refreshment given and finally arrived Abuja over 6hrs later and none of my bags came

The line at boarding was not well organized and managed

Crew was professional. Boarding has few seats . Since the plane was not full would have been nice to change seat on the internet

Not a fan of the diagonal partially enclosed business class seats or how they have to be converted to beds manually by crew. I prefer more isolation and user control for switching to lie flat.

No lounge access with “United First” ticket. False alarm about late flight, jeopardizing connection. Wrong meal. Loose power socket would not hold plug, could not charge device. In-flight access to text messaging did not work. Toilet seat on plane would not stay up.

We ended up with seats in the very back. So they did not recline. Have no idea why, we reserved and checked in very early. The isles were very narrow and the seats had very little leg room. But they did give us water, and a snack.

Energetic crew - flight full of swiftied going to Taylor's opening show in Paris! Long lines for bathroom made out kind of suck though

Check in etc was very good. As for on the plane, it was like flying in a freezer. It was so cold, i have flown for years and never been so cold on a plane. Staff on board said its always cold when flying which is a load of rubbish. They wouldnt put any heating on and now i have the flu because of this .

I’ve had a couple flights this week on United that were delayed by an hour or more

Flight was delayed 2.5 hours - a big deal on an overnight when you plan to sleep.

I feel like they have upgraded the app since I last flew United and I found it to be super helpful. I had stopped flying United unless absolutely necessary and my experience on this trip indicates they have been working hard to improve their services.

Surprisingly easy! I was hesitant to try this, but the cost swayed me. I actually felt like I had less stress than all the taxiing and possible delays that occur with short regional flights where you spend less time in the air than getting to and from the plane..

This flight was delayed multiple times and eventually canceled around 2-3ish. Original take off time was around 10:30am. By 3, there were no other options out of Houston, so stuck in Houston for from 3pm - 11am the next day.

They canceled the flight on us very close to the flight date .

It took 66 hours to get from Seattle to Tel Aviv. As a minor, I was left for more than 12 hours in Toronto and Frankfurt without hotel and food vouchers. It took 5 layovers. It was insane and not okay

It was delayed but got us to YYZ. I had great copassengers.

Flew SEA-CA, then CA-NRT. First flight was short but very uncomfortable, dirty, and had very small overhead storage space. The seats and fans were not cleaned and had visible dirt on them. Second flight was perfect.

My second flight ended up being through United and it was fine. Again, just frustrating that it was so late.

My experience was pretty frustrating because the first leg of my flight on United (though booked through Air Canada) was delayed causing me to miss my connecting flight on Air Canada. This could have been an easy solve as there was a direct flight later that morning via Air Canada that they easily could have put me on which would have only gotten me to my destination 2 1/2 hours later but because United and Air Canada don’t seem to have good communication they gave me the run around both telling me to talk with the other which I did three times to no avail. I ended up taking the delayed flight and getting on a new connecting flight which ended up getting me to my destination 6 hours later and I missed the event I was planning to go to this evening.

Everything went smoothly and as expected. We were on time and one flight arrived early.

First time flying Air Canada and the trip was very pleasant! They did a great job getting us out of Toronto and into Rome (early!) For an international flight it was very enjoyable.

This is not a Business Class equipped airplane and even the crew apologize before take over BUT BUT Air Canada charged full business class fare

All was good, except our baggage was lost for most of a day. We are thankful that it was found quickly and delivered to our hotel. Rouge was fine outside of that problem.

- OK plane. Basic accommodations. OK food. The digital window shade wasn't working.

- OK plane. Basic accommodations. OK food. The digital window shade wasn't working. - Expect to be woken up more than an hour before landing when they start dinging the bell and making announcements and turning on all cabin lights to serve a snack. I would prefer they remain quiet and only serve people who want to wake up.

Better food and more space in the seats. Also when doing the web check in both times I was going in to your site the minute you open it and there is not really many seats to choose only to buy!!!

It was ok, not as good as it used to be. The Heathrow connection was a disaster - complete anarchy, unknowledgable and skimpy assistance and signage. Gate crew at next flight was great, held the flight while my wife struggled through security.

It was great! The seats were comfortable, and they fed me during the transatlantic flight, something which I have been missing out on for the past 3 years as I travel to and from school.

This flight was cancelled at the last minute. We were rebooked on another flight but a day later. We lost a day of our vacation and paid for a night in a hotel we couldn’t use. The flights we were rebooked on (both American) messed up our seating on both flights-we didn’t get the seats we had paid for. All in all, a terrible experience.

Lost our bags in Heathrow, We didn’t receive bags in Mallorca for 3 days, out of a 7 day cycling vacation. Really inconvenient and disappointing!

We missed the flight to Barcelona because the flight from Baltimore was delayed. We flew on Vueling VW6653. Our luggage didn’t arrive. Please help us get our luggage. We are staying at Hotel Gran Via in Barcelona

The seats were tiny, being of a fairly petite build, I don’t usually expect to feel crammed and cramped in a seat, but I definitely was on this flight. I couldn’t even bend over to get anything out from under the seat in front and getting up to go to the bathroom at night with the seat backs reclined was nearly impossible. I had to do gymnastics to get over and out. For an airline that does long flights overnight, it’s kind of ridiculous.

Not connecting flights. Missed my flight from Dublin to Liverpool because I arrived at Dublin one hour too late. For this mistake, they offered me a flight from Dublin to Manchester. Thats great and all, but I waste time and money to commute to Liverpool. Be sure to check the time of your connecting flights, because they sure don’t when they sell it to you

Book cheap flights from Seattle to Portugal

Recent round-trip flight deals

9/3Tue
2 stops
18h 50mSEA-LIS
9/10Tue
2 stops
22h 21mLIS-SEA
$651
11/5Tue
2 stopsUnited Airlines
24h 20mSEA-LIS
11/13Wed
2 stopsUnited Airlines
39h 13mLIS-SEA
$654
11/6Wed
1 stopAir Canada
15h 45mSEA-LIS
11/16Sat
1 stopAir Canada
18h 14mLIS-SEA
$707
11/10Sun
2 stopsAir Canada
19h 30mSEA-LIS
11/24Sun
2 stopsAir Canada
42h 14mLIS-SEA
$713
11/2Sat
1 stopDelta
26h 05mSEA-LIS
11/17Sun
1 stopDelta
20h 20mLIS-SEA
$724
9/1Sun
1 stopBritish Airways
14h 15mSEA-LIS
11/27Wed
1 stopBritish Airways
18h 28mLIS-SEA
$837
10/23Wed
1 stopBritish Airways
19h 35mSEA-LIS
10/31Thu
2 stopsBritish Airways
32h 53mLIS-SEA
$853
10/8Tue
1 stopDelta
19h 25mSEA-LIS
10/23Wed
1 stopDelta
17h 11mLIS-SEA
$1,016
6/26Wed
1 stopAir France
20h 20mSEA-LIS
7/3Wed
1 stopAir France
15h 55mLIS-SEA
$1,031
6/24Mon
1 stopAir France
15h 35mSEA-LIS
7/12Fri
1 stopAir France
13h 40mLIS-SEA
$1,032

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Recent one-way flight deals

9/30Mon
3 stops
23h 25mSEA-LIS
$324
10/13Sun
3 stops
23h 00mSEA-LIS
$325
10/8Tue
1 stopAer Lingus
18h 50mSEA-LIS
$588
9/30Mon
1 stopAer Lingus
18h 50mSEA-LIS
$645
6/10Mon
1 stopBritish Airways
18h 10mSEA-LIS
$865
11/1Fri
2 stopsAmerican Airlines
21h 57mSEA-LIS
$872
6/17Mon
2 stopsAmerican Airlines
39h 25mSEA-LIS
$873
6/9Sun
1 stopUnited Airlines
13h 35mSEA-OPO
$875
6/9Sun
2 stopsUnited Airlines
22h 56mSEA-OPO
$881
6/3Mon
1 stopBritish Airways
17h 20mSEA-FAO
$923

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Last minute flights from Seattle to Portugal

Last minute flight, train and bus deals

5/21Tue
multi-stopKLM
17h 05mSEA-LIS
5/28Tue
multi-stopKLM
26h 35mLIS-SEA
$1,132
5/21Tue
multi-stop
23h 39mSEA-LIS
5/28Tue
multi-stop
21h 14mLIS-SEA
$1,200
5/18Sat
multi-stop
14h 15mSEA-LIS
5/20Mon
multi-stop
34h 40mLIS-SEA
$1,240
5/18Sat
multi-stop
20h 50mSEA-LIS
5/20Mon
multi-stop
24h 41mLIS-SEA
$1,270
5/19Sun
multi-stopUnited Airlines
18h 24mSEA-LIS
5/26Sun
multi-stopUnited Airlines
33h 03mLIS-SEA
$1,980
5/19Sun
multi-stopUnited Airlines
17h 42mSEA-LIS
5/26Sun
multi-stopUnited Airlines
33h 03mLIS-SEA
$1,985
5/17Fri
multi-stopTurkish Airlines
31h 15mSEA-LIS
5/25Sat
multi-stopTurkish Airlines
37h 45mLIS-SEA
$2,024
5/21Tue
multi-stopLufthansa
27h 25mSEA-LIS
6/7Fri
multi-stopLufthansa
33h 02mLIS-SEA
$2,164
5/21Tue
multi-stopAmerican Airlines
23h 50mSEA-LIS
5/28Tue
multi-stopAmerican Airlines
34h 42mLIS-SEA
$2,180
5/17Fri
multi-stopAmerican Airlines
36h 20mSEA-LIS
5/20Mon
multi-stopAmerican Airlines
18h 45mLIS-SEA
$2,381

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Seattle - Portugal Flights

Departure:

Seattle (SEA)United States

Return flight deals:

Portugal - Seattle

Cabin classes: