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Cheap flights from Seattle to Lisbon from £282

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 18/11. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
2 Sep — 9 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 3 August 2026.

Mon 23/1114:35
SEA
-
LIS
1 stop14h 15m
Icelandair
Thu 10/1214:00
LIS
-
SEA
1 stop35h 00m
Icelandair
Deal found 3/8£543
Tue 24/1108:09
SEA
-
LIS
1 stop17h 56m
United Airlines
Wed 9/1205:00
LIS
-
SEA
1 stop15h 00m
United Airlines
Deal found 3/8£552
Tue 24/1116:05
SEA
-
LIS
1 stop17h 25m
Delta
Fri 4/1205:00
LIS
-
SEA
1 stop14h 50m
Delta
Deal found 3/8£552
Mon 23/1108:09
SEA
-
LIS
2 stops16h 01m
United Airlines
Wed 9/1205:00
LIS
-
SEA
1 stop15h 00m
United Airlines
Deal found 3/8£555
Sun 22/1111:45
SEA
-
LIS
2 stops21h 45m
Delta
Tue 8/1211:30
LIS
-
SEA
1 stop32h 20m
Delta
Deal found 3/8£555
Wed 25/1107:00
SEA
-
LIS
2 stops17h 55m
United Airlines
Wed 9/1205:00
LIS
-
SEA
1 stop15h 00m
United Airlines
Deal found 3/8£557
Tue 10/1108:30
SEA
-
LIS
3 stops38h 25m
United Airlines
Thu 26/1110:55
LIS
-
SEA
2 stops40h 08m
United Airlines
Deal found 30/7£559
Sun 22/1123:15
SEA
-
LIS
1 stop24h 55m
United Airlines
Wed 9/1205:00
LIS
-
SEA
1 stop15h 00m
United Airlines
Deal found 3/8£560
Sun 22/1122:50
SEA
-
LIS
1 stop25h 10m
Delta
Fri 4/1205:00
LIS
-
SEA
1 stop14h 50m
Delta
Deal found 3/8£561
Tue 1/1207:00
SEA
-
LIS
2 stops19h 05m
United Airlines
Wed 9/1212:25
LIS
-
SEA
2 stops20h 08m
United Airlines
Deal found 2/8£562
Wed 18/1114:35
SEA
-
LIS
1 stop14h 15m
Icelandair
Tue 1/1214:00
LIS
-
SEA
1 stop35h 00m
Icelandair
Deal found 3/8£565

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 3 August 2026.

Round-trip from

£541

One-way from

£282

Popular in

June

Cheapest in

January

Average price

£685
Icelandair
  • Icelandair
  • 6/1-19/1
  • 2 total stops
  • 27h 40m total
  • Seattle to Lisbon
Search Deals
British Airways
  • British Airways
  • 18/11
  • 1 total stop
  • 36h 00m total
  • Seattle to Lisbon
Search Deals
Highest demand for flights based on searches. 28% potential increase in price (£186 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£21 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 3 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 - LIS

SEALIS

Seattle/Tacoma Intl

Mon 14/12

15:25-15:10

1 stop15h 45m

Lisbon Humberto Delgado

Fri 25/12

05:30-15:13

1 stop17h 43m

£580
Fastest return journey

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 28/9

18:45-17:50

1 stop15h 05m

Lisbon Humberto Delgado

Wed 21/10

05:00-11:52

1 stop14h 52m

£596

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 26/9

23:13-09:20

2 stops26h 07m

Lisbon Humberto Delgado

Wed 21/10

05:05-12:20

1 stop15h 15m

£598

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 22/9

07:15-11:15

2 stops20h 00m

Lisbon Humberto Delgado

Fri 2/10

05:00-16:44

2 stops19h 44m

£607

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 24/12

07:45-09:20

1 stop17h 35m

Lisbon Humberto Delgado

Thu 31/12

10:55-20:59

1 stop18h 04m

£628

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 22/9

18:45-17:50

1 stop15h 05m

Lisbon Humberto Delgado

Sat 10/10

05:00-11:52

1 stop14h 52m

£641

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 17/10

22:48-08:20

1 stop25h 32m

Lisbon Humberto Delgado

Sat 24/10

07:25-13:00

1 stop37h 35m

£642
Cheapest one-way

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 18/11

18:45-14:45

1 stop36h 00m

£282

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 17/11

18:45-12:10

1 stop33h 25m

£282

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 15/11

18:45-17:45

1 stop15h 00m

£282

Flights are sorted by cheapest return flights first.

Deals found on 31/7

Showing 1-10 of 16 resultsSorted by cheapest first
1
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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 £357). Flying from Seattle to Lisbon in June is currently the most expensive (average of £922). 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 £601 and £815 in January.
The cheapest return price found within the last 5 days was £541 on Icelandair (6 Jan–19 Jan).

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 £579, Delta can have you in Lisbon from Seattle in 15h 45m. 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 £357). Flying from Seattle to Lisbon in June is currently the most expensive (average of £922). 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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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.

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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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