SEA - LIS

C$ 488 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 6/12. 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

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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Flights 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

Sat, 6 Dec - Tue, 16 Dec
United Airlines Logo
7:00 a.m. - 9:20 a.m.SEA-LIS
18h 20m2 stops
United Airlines Logo
11:00 a.m. - 3:58 p.m.LIS-SEA
36h 58m2 stops
C$ 712United Airlines
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Sat, 6 Dec - Tue, 16 Dec
United Airlines Logo
9:25 a.m. - 10:15 a.m.SEA-LIS
16h 50m2 stops
United Airlines Logo
5:00 a.m. - 12:10 p.m.LIS-SEA
15h 10m1 stop
C$ 721United Airlines
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Fri, 7 Nov - Mon, 17 Nov
United Airlines Logo
9:25 a.m. - 9:20 a.m.SEA-LIS
39h 55m3 stops
United Airlines Logo
5:00 a.m. - 9:56 p.m.LIS-SEA
48h 56m2 stops
C$ 730United Airlines
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Sat, 9 Aug - Sun, 24 Aug
Icelandair Logo
7:00 p.m. - 9:20 p.m.SEA-LIS
18h 20m1 stop
Icelandair Logo
10:20 p.m. - 11:25 a.m.LIS-SEA
21h 05m1 stop
C$ 734Icelandair
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Sat, 6 Dec - Tue, 16 Dec
Logo
1:45 p.m. - 12:10 p.m.SEA-LIS
14h 25m1 stop
Logo
11:10 a.m. - 9:56 p.m.LIS-SEA
18h 46m1 stop
C$ 742
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Wed, 20 Aug - Sun, 24 Aug
Icelandair Logo
11:30 p.m. - 9:20 p.m.SEA-LIS
13h 50m1 stop
Icelandair Logo
10:20 p.m. - 11:25 a.m.LIS-SEA
21h 05m1 stop
C$ 748Icelandair
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Fri, 17 Oct - Sun, 9 Nov
British Airways Logo
1:30 p.m. - 6:05 p.m.SEA-LIS
20h 35m1 stop
British Airways Logo
10:45 a.m. - 11:04 p.m.LIS-SEA
20h 19m2 stops
C$ 783British Airways
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Sun, 2 Nov - Sun, 9 Nov
Virgin Atlantic Logo
10:00 p.m. - 9:00 a.m.SEA-LIS
27h 00m1 stop
Virgin Atlantic Logo
11:15 a.m. - 10:13 p.m.LIS-SEA
18h 58m1 stop
C$ 792Virgin Atlantic
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Fri, 17 Oct - Sun, 9 Nov
Logo
1:55 p.m. - 10:50 p.m.SEA-LIS
24h 55m1 stop
Logo
11:15 a.m. - 10:13 p.m.LIS-SEA
18h 58m1 stop
C$ 835
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Tue, 7 Oct - Tue, 4 Nov
British Airways Logo
8:20 p.m. - 5:55 p.m.SEA-LIS
13h 35m1 stop
British Airways Logo
8:20 a.m. - 9:15 p.m.LIS-SEA
20h 55m2 stops
C$ 891British Airways
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Useful Info

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$ 1,024 (return) on average. On the other hand, the most expensive months are June and December, where the average cost of round-trip tickets is C$ 1,870 and C$ 1,652 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 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 3 weeks before departure.

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Good to know

Low seasonFebruary
High seasonSeptember
Cheapest flightC$ 488
Best time to beat the crowds (22% less expensive on average)
Most popular time to fly and prices are also 1% lower 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$ 357 for a one-way ticket and C$ 521 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?

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

  • 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.

Top airline 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.
6.6
British AirwaysOverall score based on 7008 reviews
6.3Food
6.4Entertainment
6.8Boarding
6.7Comfort
7.6Crew
Airline reviews

The payment system was not working so was unable to connect wifi the entire flight

6.0 GoodDaniel, Jun 2025JFK - LHR
Read more British Airways reviews

The payment system was not working so was unable to connect wifi the entire flight

Business class was nothing more than Economy with middle seat empty. Uncomfortable seat and leg room. A mom behind me had a 18 month/2 yr old on her lap, who had his feet on my back all the time- while middle seat remained empty. Pretty much not worth the fare. Very disappointed.

everything to do with KAYAK was terrible. Your customer facing departments are utterly useless, timewasting and unhelpful.

I ordered short ribs for main course. It tasted sweet, really sweet. Horrible.

Our luggage didn’t arrive with us, that puts a damper on the whole trip.

The screen didn’t work and I didn’t get the seat upgrade I paid $300 for. They were no help with that,

Paid $180 for seat selection, and selection essnt honored. Have to call for a refund.

Was 3 hrs delayed and my poor friend I met in Barcelona was waiting at airport for 3 hrs. Dallas airport was awful

The internet was horrible. Plus they charged me $25 for service that didn't work which should have been free since I'm Concierge Key. The flight attendant Rick Young was excellent. Greeted me by name and very attentive.

Not good. First time flying AA in years and won’t be doing so again. We departed late and missed our connecting flight to Barcelona. As a result we missed the first two days of a Mediterranean cruise. No reason given for the delay. Got rerouted from JFK to Heathrow and then to Barcelona. Flight to Heathrow was delayed causing us to miss the flight to Barcelona again. Routed then to Palmero where we had to purchase transportation and a 2 night hotel stay to pick up the cruise there. Probably cost us $2k plus.

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

Information on your arrival and departure airports

Seattle (SEA)
Lisbon (LIS)

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