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Cheap flights from Seattle to Lisbon from £288

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 2/11. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
20 Jul — 27 Jul1
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 20 June 2026.

Mon 9/1107:00
SEA
-
LIS
2 stops17h 10m
United Airlines
Wed 18/1105:00
LIS
-
SEA
1 stop15h 00m
United Airlines
Deal found 19/6£554
Mon 9/1119:05
SEA
-
LIS
2 stops30h 45m
Air Canada
Tue 17/1105:00
LIS
-
SEA
2 stops24h 57m
Air Canada
Deal found 19/6£557
Wed 11/1107:45
SEA
-
LIS
1 stop19h 15m
Multiple Airlines
Tue 17/1114:10
LIS
-
SEA
1 stop30h 50m
Multiple Airlines
Deal found 19/6£557
Wed 11/1107:00
SEA
-
LIS
2 stops20h 00m
United Airlines
Thu 19/1105:00
LIS
-
SEA
1 stop15h 00m
United Airlines
Deal found 19/6£561
Wed 4/1107:00
SEA
-
LIS
1 stop17h 10m
United Airlines
Wed 18/1105:00
LIS
-
SEA
1 stop15h 00m
United Airlines
Deal found 19/6£563
Mon 9/1108:10
SEA
-
LIS
1 stop18h 10m
United Airlines
Tue 17/1110:15
LIS
-
SEA
1 stop19h 06m
United Airlines
Deal found 19/6£568
Tue 13/1013:30
SEA
-
LIS
1 stop20h 20m
Delta
Wed 28/1005:00
LIS
-
SEA
1 stop14h 47m
Delta
Deal found 20/6£586
Tue 24/1105:07
SEA
-
LIS
2 stops19h 03m
United Airlines
Tue 1/1211:20
LIS
-
SEA
3 stops42h 36m
United Airlines
Deal found 18/6£591
Mon 9/1107:00
SEA
-
LIS
1 stop17h 10m
United Airlines
Mon 16/1105:00
LIS
-
SEA
1 stop15h 00m
United Airlines
Deal found 19/6£592
Mon 9/1110:10
SEA
-
LIS
2 stops15h 40m
Air Canada
Mon 16/1105:00
LIS
-
SEA
2 stops21h 22m
Air Canada
Deal found 19/6£594

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 20 June 2026.

Round-trip from

£554

One-way from

£288

Popular in

June

Cheapest in

January

Average price

£934
United Airlines
  • United Airlines
  • 9/11-18/11
  • 3 total stops
  • 32h 10m total
  • Seattle to Lisbon
Search Deals
British Airways
  • British Airways
  • 2/11
  • 1 total stop
  • 19h 05m total
  • Seattle to Lisbon
Search Deals
Highest demand for flights based on searches. 27% potential increase in price (£178 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£22 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 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 20 June 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

Tue 10/11

07:00-08:10

1 stop17h 10m

Lisbon Humberto Delgado

Thu 19/11

05:00-12:00

1 stop15h 00m

£554

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 10/11

08:10-10:05

1 stop17h 55m

Lisbon Humberto Delgado

Wed 18/11

05:00-12:00

1 stop15h 00m

£554

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 9/11

08:10-10:20

1 stop18h 10m

Lisbon Humberto Delgado

Wed 18/11

05:00-12:00

1 stop15h 00m

£554

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 12/11

07:00-08:10

1 stop17h 10m

Lisbon Humberto Delgado

Tue 17/11

12:20-20:38

1 stop16h 18m

£627

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 14/12

06:00-11:20

2 stops21h 20m

Lisbon Humberto Delgado

Fri 25/12

05:30-18:30

2 stops21h 00m

£676

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 12/11

07:45-11:00

1 stop19h 15m

Lisbon Humberto Delgado

Mon 16/11

13:00-13:25

2 stops32h 25m

£679

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 22/11

15:30-08:00

1 stop32h 30m

Lisbon Humberto Delgado

Sun 29/11

12:20-15:21

1 stop35h 01m

£729

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 13/11

09:50-16:05

2 stops22h 15m

Lisbon Humberto Delgado

Mon 16/11

07:05-22:04

2 stops22h 59m

£749

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 19/9

23:04-10:30

1 stop27h 26m

Lisbon Humberto Delgado

Sat 3/10

05:05-12:20

1 stop15h 15m

£750
Cheapest one-way

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 25/11

08:33-10:20

2 stops17h 47m

£294

Flights are sorted by cheapest return flights first.

Deals found on 18/6

Showing 1-10 of 17 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 £365). Flying from Seattle to Lisbon in June is currently the most expensive (average of £941). 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 £554, United Airlines can have you in Lisbon from Seattle in 17h 10m. 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 £365). Flying from Seattle to Lisbon in June is currently the most expensive (average of £941). 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
Setúbal
Fátima
Nazaré
Evora
Madeira
Estoril
Óbidos
Almada
Tomar
Beja
Figueira da Foz
Sintra
Costa da Caparica
Sesimbra
Peniche

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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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