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Cheap flights from Seattle to Lisbon from £244

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 19/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
17 Dec — 24 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap 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 17 November 2025.

Round-trip from

£375

One-way from

£244

Popular in

June

Cheapest in

November

Average price

£486
United Airlines
  • United Airlines
  • 30/12-14/1
  • 4 total stops
  • 60h 52m total
  • Seattle to Lisbon
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British Airways
  • British Airways
  • 19/4
  • 2 total stops
  • 20h 22m total
  • Seattle to Lisbon
Search Deals
Highest demand for flights based on searches. 20% potential increase in price (£132 potential increase over avg. return price).
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Cheapest flight prices on average. 4% potential price decrease (£22 potential savings vs. average return price).
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Average for round-trip flights in November 2025
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Find 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 17 November 2025.

Mon 29/1223:15SEA - LIS
2 stops24h 55mUnited Airlines
Wed 14/111:20LIS - SEA
2 stops36h 41mUnited Airlines
Deal found 16/11£375
Wed 10/1210:40SEA - LIS
2 stops15h 35mUnited Airlines
Tue 16/1205:00LIS - SEA
1 stop15h 10mUnited Airlines
Deal found 16/11£376
Sat 6/1217:11SEA - LIS
2 stops33h 04mUnited Airlines
Tue 16/1211:20LIS - SEA
2 stops43h 08mUnited Airlines
Deal found 16/11£377
Tue 30/1214:00SEA - LIS
1 stop16h 30mUnited Airlines
Tue 13/111:20LIS - SEA
2 stops32h 12mUnited Airlines
Deal found 16/11£378
Tue 30/1207:40SEA - LIS
1 stop16h 20mDelta
Tue 13/112:20LIS - SEA
1 stop33h 05mDelta
Deal found 16/11£382
Tue 30/1213:25SEA - LIS
1 stop24h 20mBritish Airways
Mon 12/112:55LIS - SEA
1 stop30h 35mBritish Airways
Deal found 16/11£385
Tue 9/1208:10SEA - LIS
1 stop18h 05mUnited Airlines
Wed 17/1211:00LIS - SEA
1 stop19h 16mUnited Airlines
Deal found 16/11£388
Wed 10/1207:00SEA - LIS
2 stops19h 15mUnited Airlines
Wed 17/1211:00LIS - SEA
1 stop19h 16mUnited Airlines
Deal found 16/11£392

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 17 November 2025.
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

Mon 16/3

23:59-08:10

2 stops25h 11m

Lisbon Humberto Delgado

Wed 25/3

06:10-14:20

1 stop15h 10m

£376

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 16/3

15:00-14:50

1 stop16h 50m

Lisbon Humberto Delgado

Thu 26/3

05:00-13:10

1 stop15h 10m

£378

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 21/4

10:55-15:45

2 stops20h 50m

Lisbon Humberto Delgado

Sat 2/5

07:00-22:16

2 stops23h 16m

£379

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 20/2

14:15-17:30

1 stop19h 15m

Lisbon Humberto Delgado

Sat 28/2

05:30-18:43

2 stops21h 13m

£380

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 16/3

12:00-21:30

2 stops26h 30m

Lisbon Humberto Delgado

Wed 25/3

19:00-23:40

2 stops35h 40m

£383

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 21/2

14:04-17:30

2 stops19h 26m

Lisbon Humberto Delgado

Sat 28/2

05:30-18:43

2 stops21h 13m

£384

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 27/2

13:35-09:55

1 stop36h 20m

Lisbon Humberto Delgado

Sat 7/3

12:55-16:55

1 stop36h 00m

£385

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 13/2

23:06-09:05

1 stop25h 59m

Lisbon Humberto Delgado

Sun 22/2

11:05-22:01

1 stop18h 56m

£388

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 29/12

23:00-08:00

1 stop25h 00m

Lisbon Humberto Delgado

Tue 13/1

10:00-20:00

1 stop18h 00m

£388

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 22/2

07:10-16:30

2 stops25h 20m

Lisbon Humberto Delgado

Sun 8/3

18:00-22:25

2 stops35h 25m

£390

Flights are sorted by cheapest return flights first.

Deals found on 16/11

Showing 1-10 of 18 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 14 November 2025.

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 £269). Flying from Seattle to Lisbon in June is currently the most expensive (average of £771). 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 £377, United Airlines can have you in Lisbon from Seattle in 25h. 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 £269). Flying from Seattle to Lisbon in June is currently the most expensive (average of £771). 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
Madeira
Setúbal
Oeiras
Fátima
Estoril
Almada
Beja
Sintra
Costa da Caparica
Óbidos
Nazaré
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.

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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