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Cheap flights from Seattle to Lisbon from £252

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
13 Jun — 20 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Seattle to Lisbon

Enter your travel dates to find the best prices.

Cheapest flights from Seattle to Lisbon
Explore the most affordable flight options available from Seattle to Lisbon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 14 May 2026.

Fri 4/915:55
SEA
-
LIS
2 stops20h 25m
Multiple Airlines
Sat 12/922:55
LIS
-
SEA
1 stop22h 50m
Multiple Airlines
Deal found 12/5£602
Tue 27/1008:00
SEA
-
LIS
1 stop19h 15m
United Airlines
Fri 6/1105:00
LIS
-
SEA
1 stop15h 10m
United Airlines
Deal found 9/5£610
Mon 26/1011:50
SEA
-
LIS
1 stop14h 10m
KLM
Mon 9/1115:35
LIS
-
SEA
1 stop28h 12m
KLM
Deal found 9/5£611
Mon 12/1023:50
SEA
-
LIS
2 stops25h 30m
United Airlines
Wed 4/1105:00
LIS
-
SEA
1 stop15h 10m
United Airlines
Deal found 10/5£612
Sat 24/1023:50
SEA
-
LIS
2 stops25h 20m
United Airlines
Fri 6/1105:00
LIS
-
SEA
1 stop15h 10m
United Airlines
Deal found 9/5£613
Sun 25/1006:05
SEA
-
LIS
2 stops19h 55m
Delta
Mon 9/1111:25
LIS
-
SEA
1 stop32h 22m
Delta
Deal found 9/5£614
Sat 24/1021:55
SEA
-
LIS
2 stops28h 05m
Delta
Mon 9/1111:25
LIS
-
SEA
1 stop32h 22m
Delta
Deal found 9/5£618
Sat 24/1013:00
SEA
-
LIS
1 stop36h 10m
United Airlines
Tue 10/1105:00
LIS
-
SEA
1 stop15h 10m
United Airlines
Deal found 9/5£619
Sun 1/1111:10
SEA
-
LIS
2 stops20h 55m
Multiple Airlines
Sat 7/1107:05
LIS
-
SEA
2 stops23h 06m
Multiple Airlines
Deal found 11/5£627
Sun 11/1007:20
SEA
-
LIS
1 stop19h 25m
Delta
Wed 4/1111:25
LIS
-
SEA
1 stop32h 22m
Delta
Deal found 10/5£646

Find flight deals from Seattle to Lisbon

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Lisbon (LIS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 14 May 2026.

Round-trip from

£602

One-way from

£252

Popular in

June

Cheapest in

January

Average price

£800
Scandinavian Airlines
  • Scandinavian Airlines
  • 4/9-12/9
  • 3 total stops
  • 43h 15m total
  • Seattle to Lisbon
Search Deals
Lufthansa
  • Lufthansa
  • 5/10
  • 1 total stop
  • 25h 25m total
  • Seattle to Lisbon
Search Deals
Highest demand for flights based on searches. 26% potential increase in price (£158 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£21 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Seattle to Lisbon that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 14 May 2026.
Use the filters below to find and compare flights from Seattle to Lisbon that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 2/11

08:00-10:15

1 stop18h 15m

Lisbon Humberto Delgado

Fri 6/11

05:00-12:10

1 stop15h 10m

£610

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 6/10

18:50-22:45

1 stop19h 55m

Lisbon Humberto Delgado

Sun 18/10

06:15-16:59

1 stop18h 44m

£728

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 12/9

23:10-08:20

2 stops25h 10m

Lisbon Humberto Delgado

Sat 26/9

13:00-15:49

2 stops34h 49m

£753

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 16/9

13:45-23:25

2 stops25h 40m

Lisbon Humberto Delgado

Sun 27/9

16:35-16:00

1 stop31h 25m

£942

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 28/6

18:50-22:45

1 stop19h 55m

Lisbon Humberto Delgado

Wed 15/7

05:05-22:42

2 stops25h 37m

£952

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 7/6

19:10-09:55

1 stop30h 45m

Lisbon Humberto Delgado

Thu 6/8

17:05-17:20

1 stop32h 15m

£1,019

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 1/6

07:35-08:20

1 stop16h 45m

Lisbon Humberto Delgado

Thu 18/6

05:05-14:22

2 stops17h 17m

£1,020

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 5/6

19:10-15:50

1 stop36h 40m

Lisbon Humberto Delgado

Thu 6/8

17:05-17:20

1 stop32h 15m

£1,048

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 18/6

17:45-22:50

1 stop21h 05m

Lisbon Humberto Delgado

Sun 28/6

19:45-11:37

1 stop23h 52m

£1,055

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 19/6

17:45-18:45

1 stop17h 00m

Lisbon Humberto Delgado

Sun 5/7

19:45-11:33

1 stop23h 48m

£1,055

Flights are sorted by cheapest return flights first.

Deals found on 11/5

Showing 1-10 of 20 resultsSorted by cheapest first
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Best time to book a flight from Seattle to Lisbon

Have a flexible travel schedule? Discover the best time to fly to Lisbon from Seattle with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

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

The price you pay for your flight from Seattle to Lisbon may vary depending on when you book. For the best chance of a lower fare, look to book 80 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Seattle to Lisbon?

Currently, January is the cheapest month in which you can book a flight from Seattle to Lisbon (average of £364). Flying from Seattle to Lisbon in June is currently the most expensive (average of £903). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost for a return flight from Seattle to Lisbon?

Related info for your journey

Find useful and relevant information for your journey from Seattle to Lisbon. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Seattle to Lisbon?

    For as low as £728, United Airlines can have you in Lisbon from Seattle in 19h 55m. The distance from Seattle to Lisbon is about 5199 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • Can I find deals for flights from Seattle to Lisbon that include hotel bookings?

    Yes. In addition to deals on Seattle to Lisbon flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Lisbon?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Lisbon.

  • Can I find deals for business class flights from Seattle to Lisbon?

    Yes. Cheapflights offers flight deals from Seattle to Lisbon by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Lisbon?

    Currently, January is the cheapest month in which you can book a flight from Seattle to Lisbon (average of £364). Flying from Seattle to Lisbon in June is currently the most expensive (average of £903). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Lisbon?

Book flights to Lisbon if you plan to visit one of these locations
Oeiras
Fátima
Setúbal
Nazaré
Madeira
Evora
Estoril
Óbidos
Almada
Beja
Sintra
Costa da Caparica
Sesimbra
Peniche

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It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Seattle to Lisbon.

Can Cheapflights find flights from Seattle to Lisbon with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Seattle to Lisbon, users can toggle the no change fees filter when performing a flight search.

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Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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