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Cheap flights from Seattle to Lisbon from £280

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 15/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
20 Feb — 27 Feb1
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 21 January 2026.

Wed 22/418:50
SEA
-
LIS
1 stop19h 55m
United Airlines
Fri 1/513:00
LIS
-
SEA
1 stop29h 20m
United Airlines
Deal found 19/1£359
Sun 12/420:20
SEA
-
LIS
1 stop35h 25m
British Airways
Sun 19/407:20
LIS
-
SEA
1 stop36h 15m
British Airways
Deal found 20/1£361
Sat 28/208:17
SEA
-
LIS
1 stop17h 58m
United Airlines
Fri 20/306:10
LIS
-
SEA
1 stop15h 10m
United Airlines
Deal found 19/1£361
Sun 22/214:15
SEA
-
LIS
1 stop16h 55m
Delta
Sun 1/311:25
LIS
-
SEA
1 stop32h 10m
Delta
Deal found 20/1£362
Thu 19/207:00
SEA
-
LIS
2 stops16h 55m
United Airlines
Tue 3/305:00
LIS
-
SEA
1 stop15h 10m
United Airlines
Deal found 20/1£363
Wed 8/411:16
SEA
-
LIS
2 stops27h 59m
British Airways
Sat 18/418:55
LIS
-
SEA
1 stop24h 40m
British Airways
Deal found 20/1£364
Fri 27/215:10
SEA
-
LIS
1 stop14h 10m
United Airlines
Wed 18/311:55
LIS
-
SEA
2 stops20h 04m
United Airlines
Deal found 19/1£364
Fri 20/208:30
SEA
-
LIS
2 stops18h 50m
Delta
Thu 5/305:00
LIS
-
SEA
1 stop14h 35m
Delta
Deal found 20/1£365
Tue 27/105:00
SEA
-
LIS
2 stops19h 10m
United Airlines
Thu 2/412:20
LIS
-
SEA
2 stops29h 26m
United Airlines
Deal found 20/1£366
Sat 2/523:14
SEA
-
LIS
1 stop27h 16m
United Airlines
Sun 10/513:00
LIS
-
SEA
1 stop29h 20m
United Airlines
Deal found 20/1£367
Wed 21/108:40
SEA
-
LIS
2 stops15h 30m
United Airlines
Thu 29/105:00
LIS
-
SEA
1 stop15h 10m
United Airlines
Deal found 20/1£367
Wed 21/108:40
SEA
-
LIS
2 stops15h 30m
United Airlines
Wed 28/106:10
LIS
-
SEA
1 stop15h 10m
United Airlines
Deal found 20/1£368

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 21 January 2026.

Round-trip from

£359

One-way from

£280

Popular in

June

Cheapest in

January

Average price

£375
United Airlines
  • United Airlines
  • 22/4-1/5
  • 2 total stops
  • 49h 15m total
  • Seattle to Lisbon
Search Deals
British Airways
  • British Airways
  • 15/4
  • 2 total stops
  • 25h 46m total
  • Seattle to Lisbon
Search Deals
Highest demand for flights based on searches. 24% potential increase in price (£150 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£23 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 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 21 January 2026.
Use the filters below to find and compare flights from Seattle to Lisbon that are best for you.

Fly from

Seattle

Fly to

Lisbon

Route

Depart

Return

Price

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 11/4

23:10-23:05

2 stops39h 55m

Lisbon Humberto Delgado

Sat 18/4

18:55-11:35

1 stop24h 40m

£361

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 28/2

08:17-10:15

1 stop17h 58m

Lisbon Humberto Delgado

Fri 20/3

06:10-14:20

1 stop15h 10m

£361

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 12/4

07:00-17:45

2 stops26h 45m

Lisbon Humberto Delgado

Sat 18/4

18:55-11:35

1 stop24h 40m

£364

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 26/2

07:00-08:10

2 stops17h 10m

Lisbon Humberto Delgado

Fri 20/3

06:10-14:20

1 stop15h 10m

£365

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 20/3

15:00-16:20

1 stop18h 20m

Lisbon Humberto Delgado

Wed 1/4

06:15-16:59

1 stop18h 44m

£367

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 11/4

22:25-10:45

1 stop28h 20m

Lisbon Humberto Delgado

Mon 20/4

11:55-11:45

1 stop31h 50m

£370

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 25/4

20:20-23:10

1 stop18h 50m

Lisbon Humberto Delgado

Sat 2/5

06:35-22:26

2 stops23h 51m

£370

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 23/4

13:35-23:05

1 stop25h 30m

Lisbon Humberto Delgado

Sat 2/5

06:35-22:26

2 stops23h 51m

£370

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 27/2

14:20-10:15

2 stops35h 55m

Lisbon Humberto Delgado

Thu 19/3

05:00-22:45

2 stops24h 45m

£371

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 21/2

07:00-10:15

2 stops19h 15m

Lisbon Humberto Delgado

Sat 28/2

06:10-18:27

2 stops20h 17m

£373

Flights are sorted by cheapest return flights first.

Deals found on 18/1

Showing 1-10 of 20 results
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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?

Use this chart to determine the optimal time to book a return flight from Seattle to Lisbon. Price data was last updated on 16 January 2026.

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 27 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 £259). Flying from Seattle to Lisbon in June is currently the most expensive (average of £769). 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.

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 £361, United Airlines can have you in Lisbon from Seattle in 18h 30m. 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 £259). Flying from Seattle to Lisbon in June is currently the most expensive (average of £769). 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
Setúbal
Oeiras
Madeira
Fátima
Estoril
Óbidos
Almada
Beja
Sintra
Costa da Caparica
Nazaré
Sesimbra
Peniche

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Why should you use Cheapflights to find cheap flight tickets from Seattle to Lisbon?

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.

Can Cheapflights notify me if prices for flights from Seattle to Lisbon become cheaper?

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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