SEA - LIS

C$ 402 Find Cheap Flights from Seattle to Lisbon

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 Lisbon departing on 17/3. 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
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Lisbon

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Lisbon, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Lisbon, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
C$ 657
Overall average: C$ 817
United Airlines
Sun 1/3Tue 17/3
SEA - LIS • 1 stop
Cheapest one-way flights
C$ 402
Typical prices: C$ 682-C$ 847
Multiple Airlines
Tue 17/3
SEA - LIS • 3 stops
Top airlines
United Airlines
Cheapest • from C$ 657 (round-trip)
Turkish Airlines
Best reviews • 7.3 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
2 weeks
in advance
Our data shows that travellers who book at least 2 weeks in advance save around 19% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
January
Cheapest • 40% price drop
September
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Lisbon!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Seattle to Lisbon (SEA-LIS)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Lisbon 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 for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Lisbon

Sun, 1 Mar - Tue, 17 Mar
United Airlines Logo
8:17 a.m. - 10:15 a.m.
SEA
-
LIS
17h 58m
1 stop
United Airlines Logo
5:00 a.m. - 1:10 p.m.
LIS
-
SEA
15h 10m
1 stop
C$ 657United Airlines
Sat, 28 Feb - Sat, 7 Mar
United Airlines Logo
7:00 a.m. - 8:10 a.m.
SEA
-
LIS
17h 10m
2 stops
United Airlines Logo
5:00 a.m. - 12:10 p.m.
LIS
-
SEA
15h 10m
1 stop
C$ 660United Airlines
Tue, 14 Apr - Thu, 23 Apr
Delta Logo
6:40 p.m. - 5:50 p.m.
SEA
-
LIS
15h 10m
1 stop
Delta Logo
5:00 a.m. - 11:45 a.m.
LIS
-
SEA
14h 45m
1 stop
C$ 661Delta
Wed, 25 Feb - Wed, 4 Mar
United Airlines Logo
8:17 a.m. - 10:15 a.m.
SEA
-
LIS
17h 58m
1 stop
United Airlines Logo
6:10 a.m. - 1:20 p.m.
LIS
-
SEA
15h 10m
1 stop
C$ 662United Airlines
Sun, 1 Mar - Tue, 17 Mar
United Airlines Logo
11:59 p.m. - 8:10 a.m.
SEA
-
LIS
24h 11m
2 stops
United Airlines Logo
6:10 a.m. - 8:56 p.m.
LIS
-
SEA
21h 46m
2 stops
C$ 664United Airlines
Sat, 18 Apr - Mon, 27 Apr
United Airlines Logo
11:59 p.m. - 10:30 a.m.
SEA
-
LIS
26h 31m
2 stops
United Airlines Logo
5:05 a.m. - 12:20 p.m.
LIS
-
SEA
15h 15m
1 stop
C$ 665United Airlines
Sun, 19 Apr - Wed, 29 Apr
Delta Logo
6:00 a.m. - 8:00 a.m.
SEA
-
LIS
18h 00m
2 stops
Delta Logo
5:00 a.m. - 11:45 a.m.
LIS
-
SEA
14h 45m
1 stop
C$ 667Delta
Mon, 20 Apr - Wed, 29 Apr
Delta Logo
5:30 p.m. - 6:45 p.m.
SEA
-
LIS
17h 15m
1 stop
Delta Logo
5:00 a.m. - 11:45 a.m.
LIS
-
SEA
14h 45m
1 stop
C$ 668Delta
Sun, 12 Apr - Sun, 19 Apr
United Airlines Logo
11:59 p.m. - 10:30 a.m.
SEA
-
LIS
26h 31m
2 stops
United Airlines Logo
11:25 a.m. - 10:37 p.m.
LIS
-
SEA
43h 12m
2 stops
C$ 669United Airlines
Mon, 23 Mar - Thu, 2 Apr
United Airlines Logo
7:00 a.m. - 1:20 p.m.
SEA
-
LIS
23h 20m
2 stops
United Airlines Logo
5:05 a.m. - 12:20 p.m.
LIS
-
SEA
15h 15m
1 stop
C$ 671United Airlines
Booking Insights

KAYAK's insights & trends for Seattle to Lisbon flights

Get data-powered insights and trends into flights from Seattle to Lisbon to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Seattle to Lisbon?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Lisbon, 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 Seattle to Lisbon is January, where tickets cost C$ 684 (return) on average. On the other hand, the most expensive months are June and May, where the average cost of round-trip tickets is C$ 1,739 and C$ 1,457 respectively.

How far in advance should I book a flight from Seattle to Lisbon?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle to Lisbon, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Seattle to Lisbon, you should book around 2 weeks before departure, which saves you about 19% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 4 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flightC$ 402
Best time to beat the crowds (40% less expensive on average)
Most popular time to fly (4% more expensive on average)
Flight from Seattle to Lisbon

When to book flights from Seattle to Lisbon

Are your dates flexible? Find out the best times to travel from Seattle to Lisbon 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 Seattle to Lisbon

  • How early should I get to SEA on the date I’m supposed to travel?

    On the date you’re supposed to fly to Lisbon from Seattle, it’s in your best interest to reach SEA at least 2h ahead of your flight. Getting to this airport this early will give you adequate time to go through the airport’s time-consuming checkpoints and check out the interesting sites available in its terminals.

  • Does SEA have a spa?

    If you’d like to visit a spa while waiting for your flight at SEA, you’re in luck, as this airport is home to the fabulous Terminal Gateway Spa. Situated a short distance from Gate A5, this spa features exceptional professionals. Given that it offers its services at affordable rates, you won’t incur an exaggerated bill at this spa.

  • Can I leave my luggage at LIS?

    LIS has a luggage storage facility. Located next to car park P2, this facility offers secure storage services at affordable rates. It’s worth noting that as it is usually open 24/7, you can pick up your luggage at this facility whenever you feel like it.

  • Where can I shower at LIS?

    At LIS, you can shower at either ANA Lounge, located on the 6th floor of Terminal 1, or the Airport Business Center, near check-in desks 14 to 36 in Terminal 1. Please note that to gain entry to either, you’ll have to pay an entry fee.

  • What is the cheapest flight from Seattle to Lisbon?

    In the last 3 days, the lowest price for a flight from Seattle to Lisbon was C$ 402 for a one-way ticket and C$ 657 for a round-trip.

  • Which aircraft models fly most regularly from Seattle to Lisbon?

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

  • Which airline alliances offer flights from Seattle to Lisbon?

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

  • Which is the best airline for flights from Seattle to Lisbon, Turkish Airlines or British Airways?

    The two airlines most popular with KAYAK users for flights from Seattle to Lisbon are Turkish Airlines and British Airways. With an average price for the route of C$ 754 and an overall rating of 7.3, Turkish Airlines is the most popular choice. British Airways is also a great choice for the route, with an average price of C$ 1,365 and an overall rating of 6.7.

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

    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 Lisbon.

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

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

    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 Lisbon 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 Lisbon?

    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 Lisbon from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Seattle to Lisbon

  • If you are traveling to Lisbon with your kids, you should consider checking out Seattle-Tacoma International Airport’s (SEA) children’s play area. Located between the Central Terminal and Gates A, this children’s play area features a variety of toys and soft play areas for toddlers. Given that it is normally open round-the-clock, you can count on finding it open regardless of the time.
  • SEA features several nursing rooms. These nursing rooms are near Gates A9, C10, D10, D23, and N2. As they all feature changing tables, you can comfortably change your baby’s diapers in any of these rooms.
  • To pay for services and purchase goods easily once you land at Humberto Delgado Airport (LIS), you should convert some of your cash to the local currency. At SEA, you’ll be able to do so, as this airport features currency exchange sites. They are located in the ticketing level and baggage claim area in the Main Terminal and near Gates A and S.
  • LIS features information desks in its Arrivals Hall and Departures Hall. At any of these information desks, open from 7 am to 12 am, you can rest assured of getting the help you need once you land at this airport, as they are both manned by informed airport staff.
  • If you have the necessary documents, you can easily rent a car at LIS, as this airport features counters for car rental agencies such as Hertz, SIXT, Europcar, Avis, Budget, and other local car rentals. As the counters for these car rentals are within the airport’s terminal complex, you won’t need any form of ground transportation to get to the counter of your preferred car rental.

Reviews of the top airlines flying from Seattle to Lisbon

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Lisbon. 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 Seattle to Lisbon? 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.
7.3
Turkish AirlinesOverall score based on 4208 reviews
7.8Crew
7.4Food
7.3Comfort
7.3Boarding
7.4Entertainment
Airline reviews

My, Syed Zawar Hussein Shirazi frequently flyer membership number was not included on my boarding pass from O’Hare to Istanbul despite my reminder to the attendant at check in. Further she forgot to give me my boarding pass form Istanbul to Lahore and she needs to improve her customer service, please 🙏

8.0 ExcellentAnonymous, Jan 2026
ORD - IST
Read more Turkish Airlines reviews

My, Syed Zawar Hussein Shirazi frequently flyer membership number was not included on my boarding pass from O’Hare to Istanbul despite my reminder to the attendant at check in. Further she forgot to give me my boarding pass form Istanbul to Lahore and she needs to improve her customer service, please 🙏

Everything about that day was great I was happy with how things went as a first time traveling with the airline thank you for all that you’ve doing by taking us there to our various destinations thanks.

They oversold the tickets by one which was my ticket so I didn’t have a ticket till last second

Not good. I was supposed to be in Mint but got in economy class

Service was slow and checked bag was off last evening when flying business

Turkish Airline canceled our tickets in the very last minute, with our luggage and everything else, all prepared and good to go. It’s clear that they sold the tickets for better money to someone else. Bad, Bad, Bad business!!!

Awful seating. Bad food. Staff only have one bottle of water and no cans.

it was like a banya -so hot... They did provide a great experience with special food. one toilet broke midflight In general it was a peaceful and relaxing flight - for business class it was good.

Chicago to Istanbul was a much better experience than I expected since I’m more accustomed to Qatar Airways business class. The business lounge in the Istanbul airport was amazing - loved the lockers and phone charging stations, and the bathroom was a spa experience in itself. The onward leg from Istanbul to Karachi was utterly disappointing. Terrible plane, and I felt like I was in economy - the seats don’t come near to lying flat and the food was mediocre. What a sad downgrade - it isn’t as though the ticket on that leg was cheaper. So, on that front, there’s no contest with Qatar airways.

Second leg of Turkish Airline with Indigo is disaster for following reason. 1) You have to carry your cabin bags through ladder to boeing 777 because it was parked somewhere in parking lot and was not given a gate to board passengers and this seems to be people traveling to and fro from those flights and is not issue with flight itself. 2) I choose non vegetarian food on Turkish portal way ahead of checkin to entire trip, However the Indigo flight gave me random veg food saying they code veg food code from Turkish. 3) Indigo did not served any alcoholic beverages stating some weird reason which is non nonsensical. 4)Indigo have TV screens in front of you but it displays nothing except "Welcome Onboard" with annoying white black ground in dark flight. This is the most stupidest and annoying part because you are held hostage for 7 hours and only thing you could do is stare back at white screen which does not have entertainment package or even flight tracker. Such a shame.

The issue was not with BA it was with the link yoiu sent fopr booking the flight

Loved the boarding option from Business class lounge, experience on flight was excellent, plenty of good food choices

Getting the boarding passes between the BA and AA apps was very clunky.

The airline was not clear about a new departure time so we got to the airport early anyway. The flight left early which was great because of weather. The check in process was very easy and staff were friendly and helpful. The crew was great and our flight was very good.

Awful it always is unfortunately is the only way to fly direct to london

I travelled in business class and was disappointed by lack of service, curt and borderline rude time of the crew and to top it off, all of my luggage was delayed. It was like pulling teeth to even report the missing luggage and recover it the next day from the airport.

Plane was extremely delayed, but not all of it was BA fault (some was). Worst part was lack of room - this had as much space as an Allegiant flight. I thought transatlantic usually gave you an extra inch or two, but not this one. Entertainment system sporadically worked and didn’t have great options. Overhead bins are old and tiny, not as good as aunties new planes.

Boarding was poor. All groups called immediately one after the other resulting in a long queue in the jetty/jet bridge. Seats were very hard and and did not recline on a 4.5 hour flight. No food was available. Plane was cold. There was no entertainment.

The cramped seats are cruel and unusual punishment and may violate the Geneva code.

Check in was was and the agent was very friendly and helpful The lounge was nice...boarding was straight from the lounge Everything worked at our seats, and video entertainment was good ..food was mediocre

Everything you need to know for your flight from Seattle to Lisbon

Information on your arrival and departure airports