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Cheap flights from Seattle to Lisbon from £263

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 19/7. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
7 Apr — 14 Apr1
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 8 March 2026.

Mon 20/420:20
SEA
-
LIS
1 stop13h 35m
Multiple Airlines
Tue 28/408:25
LIS
-
SEA
2 stops22h 13m
Multiple Airlines
Deal found 4/3£388
Mon 23/1114:00
SEA
-
LIS
1 stop24h 50m
Lufthansa
Sat 5/1214:10
LIS
-
SEA
1 stop31h 10m
Lufthansa
Deal found 5/3£397
Tue 7/407:09
SEA
-
LIS
2 stops32h 16m
Finnair
Wed 15/406:35
LIS
-
SEA
2 stops24h 03m
Finnair
Deal found 4/3£401
Tue 21/420:20
SEA
-
LIS
1 stop18h 40m
British Airways
Tue 28/411:00
LIS
-
SEA
2 stops19h 38m
British Airways
Deal found 4/3£403
Tue 21/407:09
SEA
-
LIS
2 stops32h 16m
Finnair
Sat 2/518:55
LIS
-
SEA
2 stops32h 41m
Finnair
Deal found 4/3£420
Mon 20/407:15
SEA
-
LIS
2 stops20h 00m
Delta
Fri 8/505:00
LIS
-
SEA
1 stop14h 42m
Delta
Deal found 4/3£423
Thu 26/1108:00
SEA
-
LIS
1 stop18h 15m
United Airlines
Sat 5/1210:15
LIS
-
SEA
1 stop15h 50m
United Airlines
Deal found 5/3£430
Mon 20/407:15
SEA
-
LIS
2 stops20h 00m
Delta
Tue 28/405:00
LIS
-
SEA
2 stops21h 26m
Delta
Deal found 4/3£431
Sun 12/420:20
SEA
-
LIS
1 stop18h 45m
British Airways
Fri 24/418:55
LIS
-
SEA
1 stop24h 40m
British Airways
Deal found 4/3£433
Thu 30/407:15
SEA
-
LIS
2 stops19h 40m
Delta
Thu 7/505:00
LIS
-
SEA
2 stops19h 01m
Delta
Deal found 4/3£435

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 8 March 2026.

Round-trip from

£388

One-way from

£263

Popular in

June

Cheapest in

January

Average price

£497
30/4-7/5
  • 30/4-7/5
  • 3 total stops
  • 45h 44m total
  • Seattle to Lisbon
Search Deals
British Airways
  • British Airways
  • 19/7
  • 1 total stop
  • 20h 10m total
  • Seattle to Lisbon
Search Deals
Highest demand for flights based on searches. 24% potential increase in price (£147 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£20 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 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 8 March 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

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 20/4

20:20-17:55

1 stop13h 35m

Lisbon Humberto Delgado

Tue 28/4

08:25-22:38

2 stops22h 13m

£388

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 21/4

20:20-17:55

1 stop13h 35m

Lisbon Humberto Delgado

Tue 5/5

18:45-11:35

1 stop24h 50m

£433

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 25/4

17:35-22:50

1 stop21h 15m

Lisbon Humberto Delgado

Sat 2/5

19:45-11:42

1 stop23h 57m

£466

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 2/5

19:36-10:30

2 stops30h 54m

Lisbon Humberto Delgado

Sun 10/5

05:05-12:20

1 stop15h 15m

£472

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 25/4

07:15-15:45

2 stops24h 30m

Lisbon Humberto Delgado

Sat 2/5

07:00-22:31

2 stops23h 31m

£475

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 25/4

07:15-15:45

2 stops24h 30m

Lisbon Humberto Delgado

Thu 30/4

07:00-22:31

2 stops23h 31m

£497

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 21/4

13:45-18:45

1 stop21h 00m

Lisbon Humberto Delgado

Sat 2/5

19:45-11:42

1 stop23h 57m

£503

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 21/4

14:39-09:20

2 stops34h 41m

Lisbon Humberto Delgado

Tue 28/4

13:00-21:53

1 stop16h 53m

£552
Fastest return journey

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 23/4

07:15-10:55

2 stops19h 40m

Lisbon Humberto Delgado

Fri 1/5

05:00-11:40

1 stop14h 40m

£579

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 5/4

20:20-23:05

1 stop18h 45m

Lisbon Humberto Delgado

Sun 12/4

07:20-11:35

1 stop36h 15m

£631

Flights are sorted by cheapest return flights first.

Deals found on 5/3

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?

Use this chart to determine the optimal time to book a return flight from Seattle to Lisbon. Price data was last updated on 6 March 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 81 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 £730). 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 £433, British Airways can have you in Lisbon from Seattle in 13h 35m. 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 £730). 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
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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