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Cheap flights from Seattle to Lisbon from £287

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 25/11. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
16 Sep — 23 Sep1
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 17 August 2026.

Tue 27/1008:30 -
2 stops16h 40m
Wed 18/1105:00 -
1 stop15h 00m
Deal found 12/8£550
Tue 27/1017:05 -
1 stop15h 05m
Fri 13/1105:00 -
1 stop14h 47m
Deal found 12/8£550
Tue 27/1008:30 -
2 stops16h 40m
Fri 13/1106:00 -
1 stop15h 00m
Deal found 12/8£551
Sun 1/1123:15 -
2 stops27h 25m
Wed 18/1105:00 -
1 stop15h 00m
Deal found 12/8£552
Sat 31/1022:56 -
2 stops26h 14m
Thu 19/1105:00 -
1 stop15h 00m
Deal found 12/8£553
Sat 31/1022:56 -
2 stops26h 14m
Fri 13/1106:00 -
1 stop15h 00m
Deal found 12/8£554
Wed 21/1007:00 -
2 stops18h 20m
Tue 10/1111:20 -
2 stops32h 59m
Deal found 12/8£558
Sat 31/1016:00 -
1 stop33h 00m
Wed 18/1111:30 -
1 stop32h 17m
Deal found 12/8£559
Wed 4/1118:45 -
1 stop19h 10m
Mon 9/1107:05 -
1 stop36h 20m
Deal found 13/8£569
Wed 4/1107:00 -
2 stops17h 55m
Tue 10/1112:20 -
1 stop31h 40m
Deal found 13/8£570
Tue 29/907:00 -
1 stop17h 20m
Thu 3/1205:00 -
1 stop15h 00m
Deal found 12/8£572
Tue 22/918:45 -
1 stop15h 05m
Tue 22/1205:00 -
1 stop14h 50m
Deal found 14/8£572

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 17 August 2026.

Round-trip from

£550

One-way from

£287

Popular in

June

Cheapest in

January

Average price

£694
United Airlines
  • United Airlines
  • 27/10-18/11
  • 3 total stops
  • 31h 40m total
  • Seattle to Lisbon
Search Deals
United Airlines
  • United Airlines
  • 25/11
  • 2 total stops
  • 16h 01m 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 (£20 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 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 17 August 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 Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Sat 9/1

22:45-08:10

1 stop25h 25m

Lisbon Humberto Delgado

Wed 27/1

11:20-20:59

1 stop17h 39m

£566

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Mon 14/12

11:00-15:10

2 stops20h 10m

Lisbon Humberto Delgado

Fri 25/12

05:00-11:50

1 stop14h 50m

£575
Fastest return journey

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Wed 23/9

17:45-18:45

1 stop17h 00m

Lisbon Humberto Delgado

Tue 22/12

05:00-11:50

1 stop14h 50m

£576

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Sat 23/1

12:20-08:10

1 stop35h 50m

Lisbon Humberto Delgado

Sat 6/2

05:00-12:00

1 stop15h 00m

£595

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Tue 22/9

11:50-14:55

2 stops19h 05m

Lisbon Humberto Delgado

Fri 2/10

05:00-11:52

1 stop14h 52m

£598

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Wed 7/10

18:50-22:45

1 stop19h 55m

Lisbon Humberto Delgado

Thu 29/10

10:55-15:32

2 stops35h 37m

£601

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Thu 22/10

14:30-17:50

2 stops19h 20m

Lisbon Humberto Delgado

Fri 30/10

05:00-20:04

2 stops22h 04m

£620

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Mon 19/10

07:15-11:15

2 stops20h 00m

Lisbon Humberto Delgado

Sun 25/10

05:00-20:16

2 stops22h 16m

£639

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Tue 22/9

11:50-14:55

2 stops19h 05m

Lisbon Humberto Delgado

Sat 10/10

05:00-16:45

2 stops19h 45m

£650
Cheapest one-way
Fastest single journey

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Wed 25/11

08:09-08:10

2 stops16h 01m

£287

Flights are sorted by cheapest return flights first.

Deals found on 16/8

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 £355). Flying from Seattle to Lisbon in June is currently the most expensive (average of £912). 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?

Airfare is below average for this route at the moment.

Seattle to Lisbon flights typically cost between £573 and £898 in October.
The cheapest return price found within the last 5 days was £550 on United Airlines (27 Oct–18 Nov).

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 £576, Delta can have you in Lisbon from Seattle in 17h. 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 £355). Flying from Seattle to Lisbon in June is currently the most expensive (average of £912). 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
Fátima
Nazaré
Evora
Madeira
Setúbal
Almada
Óbidos
Tomar
Estoril
Figueira da Foz
Sintra
Costa da Caparica

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How does Cheapflights help users find flights from Seattle to Lisbon?

Cheapflights helps you search for flights from Seattle to Lisbon via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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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