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Cheap flights from Seattle to Lisbon from £215

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 14/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
31 Dec — 7 Jan1
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 1 December 2025.

Round-trip from

£369

One-way from

£215

Popular in

June

Cheapest in

November

Average price

£836
Delta
  • Delta
  • 5/3-12/3
  • 2 total stops
  • 50h 05m total
  • Seattle to Lisbon
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Icelandair
  • Icelandair
  • 14/1
  • 1 total stop
  • 21h 45m total
  • Seattle to Lisbon
Search Deals
Highest demand for flights based on searches. 20% potential increase in price (£131 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 December 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 1 December 2025.

Mon 1/1215:05SEA - LIS
1 stop35h 30mKLM
Mon 8/1215:30LIS - SEA
1 stop28h 20mKLM
Deal found 29/11£378
Sat 6/1211:30SEA - LIS
1 stop13h 30mDelta
Tue 16/1205:30LIS - SEA
1 stop13h 55mDelta
Deal found 30/11£383
Mon 8/1208:10SEA - LIS
1 stop18h 05mUnited Airlines
Mon 22/1211:55LIS - SEA
2 stops30h 01mUnited Airlines
Deal found 30/11£386
Thu 11/1205:00SEA - LIS
2 stops21h 15mUnited Airlines
Tue 23/1211:55LIS - SEA
2 stops30h 01mUnited Airlines
Deal found 30/11£404
Mon 1/1212:41SEA - LIS
3 stops36h 39mUnited Airlines
Mon 8/1211:20LIS - SEA
2 stops43h 08mUnited Airlines
Deal found 29/11£422
Fri 12/1205:00SEA - LIS
2 stops21h 15mUnited Airlines
Mon 22/1211:55LIS - SEA
2 stops30h 01mUnited Airlines
Deal found 29/11£424
Thu 11/1208:10SEA - LIS
1 stop18h 05mUnited Airlines
Thu 18/1211:55LIS - SEA
1 stop17h 02mUnited Airlines
Deal found 30/11£471
Tue 16/1205:00SEA - LIS
2 stops19h 10mUnited Airlines
Wed 24/1211:55LIS - SEA
2 stops30h 00mUnited Airlines
Deal found 29/11£540

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 1 December 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

Sat 28/2

06:00-08:00

2 stops18h 00m

Lisbon Humberto Delgado

Sat 7/3

05:30-11:25

1 stop13h 55m

£369

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 16/3

11:46-15:10

2 stops20h 24m

Lisbon Humberto Delgado

Mon 30/3

05:00-17:09

2 stops20h 09m

£370

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 17/3

11:45-15:10

2 stops20h 25m

Lisbon Humberto Delgado

Mon 30/3

05:00-17:09

2 stops20h 09m

£370

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 27/2

22:20-08:00

1 stop25h 40m

Lisbon Humberto Delgado

Wed 11/3

05:30-22:20

2 stops23h 50m

£372

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 4/3

21:55-08:55

1 stop27h 00m

Lisbon Humberto Delgado

Tue 10/3

05:30-22:20

2 stops23h 50m

£372

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 4/3

21:55-08:55

1 stop27h 00m

Lisbon Humberto Delgado

Mon 9/3

05:30-14:05

1 stop15h 35m

£372

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 3/3

07:10-08:00

2 stops16h 50m

Lisbon Humberto Delgado

Wed 11/3

05:30-22:20

2 stops23h 50m

£372

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 2/3

06:05-09:00

2 stops18h 55m

Lisbon Humberto Delgado

Wed 11/3

05:30-22:20

2 stops23h 50m

£372

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 27/2

14:15-15:10

1 stop16h 55m

Lisbon Humberto Delgado

Fri 6/3

05:30-22:22

2 stops24h 52m

£375

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 5/3

13:40-17:30

1 stop19h 50m

Lisbon Humberto Delgado

Tue 10/3

05:30-22:20

2 stops23h 50m

£375

Flights are sorted by cheapest return flights first.

Deals found on 30/11

Showing 1-10 of 19 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 28 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 £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 £369, Delta can have you in Lisbon from Seattle in 18h. The distance from Seattle to Lisbon is about 5199 mi.

  • 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 £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
Madeira
Setúbal
Oeiras
Fátima
Estoril
Almada
Beja
Sintra
Costa da Caparica
Óbidos
Nazaré
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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