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Cheap flights from Seattle to Lisbon from £307

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
21 Apr — 28 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 22 March 2026.

Tue 8/915:55
SEA
-
LIS
1 stop15h 50m
Multiple Airlines
Tue 29/921:15
LIS
-
SEA
2 stops32h 50m
Multiple Airlines
Deal found 18/3£481
Mon 24/814:30
SEA
-
LIS
2 stops22h 10m
Multiple Airlines
Wed 23/907:15
LIS
-
SEA
2 stops22h 50m
Multiple Airlines
Deal found 17/3£484
Thu 26/1108:00
SEA
-
LIS
1 stop18h 15m
United Airlines
Thu 3/1205:00
LIS
-
SEA
1 stop15h 10m
United Airlines
Deal found 20/3£490
Thu 31/1208:00
SEA
-
LIS
1 stop18h 15m
United Airlines
Fri 15/105:00
LIS
-
SEA
1 stop15h 10m
United Airlines
Deal found 22/3£491
Fri 17/418:50
SEA
-
LIS
1 stop19h 55m
United Airlines
Tue 21/405:05
LIS
-
SEA
1 stop15h 15m
United Airlines
Deal found 19/3£492
Mon 30/1108:10
SEA
-
LIS
1 stop17h 10m
United Airlines
Sat 12/1205:00
LIS
-
SEA
1 stop15h 10m
United Airlines
Deal found 20/3£493
Wed 30/1208:10
SEA
-
LIS
1 stop17h 10m
United Airlines
Tue 19/105:00
LIS
-
SEA
1 stop15h 10m
United Airlines
Deal found 22/3£494
Mon 20/415:17
SEA
-
LIS
2 stops18h 38m
Multiple Airlines
Mon 4/516:35
LIS
-
SEA
1 stop31h 25m
Multiple Airlines
Deal found 18/3£495
Wed 22/410:48
SEA
-
LIS
2 stops27h 57m
United Airlines
Thu 30/405:05
LIS
-
SEA
1 stop15h 15m
United Airlines
Deal found 20/3£495
Tue 29/1213:40
SEA
-
LIS
1 stop19h 50m
Delta
Tue 19/105:00
LIS
-
SEA
1 stop14h 50m
Delta
Deal found 22/3£498
Mon 27/407:20
SEA
-
LIS
1 stop16h 40m
KLM
Tue 5/505:00
LIS
-
SEA
1 stop19h 30m
KLM
Deal found 20/3£498
Wed 8/418:50
SEA
-
LIS
1 stop19h 55m
United Airlines
Wed 22/405:05
LIS
-
SEA
1 stop15h 15m
United Airlines
Deal found 20/3£499

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 22 March 2026.

Round-trip from

£481

One-way from

£307

Popular in

June

Cheapest in

January

Average price

£499
8/9-29/9
  • 8/9-29/9
  • 3 total stops
  • 48h 40m total
  • Seattle to Lisbon
Search Deals
United Airlines
  • United Airlines
  • 19/7
  • 2 total stops
  • 26h 38m total
  • Seattle to Lisbon
Search Deals
Highest demand for flights based on searches. 24% potential increase in price (£149 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 22 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

Wed 8/4

07:20-08:50

2 stops17h 30m

Lisbon Humberto Delgado

Thu 16/4

05:00-16:30

1 stop19h 30m

£501

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 17/4

20:20-23:10

1 stop18h 50m

Lisbon Humberto Delgado

Tue 21/4

18:45-11:35

1 stop24h 50m

£508

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 20/4

13:45-17:50

2 stops20h 05m

Lisbon Humberto Delgado

Tue 28/4

05:00-18:30

2 stops21h 30m

£509

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 29/4

23:59-22:45

2 stops38h 46m

Lisbon Humberto Delgado

Wed 6/5

12:55-21:08

1 stop16h 13m

£511

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 17/4

18:50-22:45

1 stop19h 55m

Lisbon Humberto Delgado

Tue 21/4

11:25-16:41

2 stops37h 16m

£513

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 24/8

14:30-20:40

2 stops22h 10m

Lisbon Humberto Delgado

Wed 23/9

07:15-22:05

2 stops22h 50m

£544

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 13/4

14:10-15:30

1 stop17h 20m

Lisbon Humberto Delgado

Mon 27/4

12:20-12:47

2 stops32h 27m

£593

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 4/5

07:35-17:50

2 stops26h 15m

Lisbon Humberto Delgado

Mon 18/5

11:55-11:42

1 stop31h 47m

£595

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 9/9

13:19-09:50

2 stops36h 31m

Lisbon Humberto Delgado

Wed 30/9

05:55-17:15

1 stop19h 20m

£639
Fastest return journey

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 2/4

13:45-18:45

1 stop21h 00m

Lisbon Humberto Delgado

Fri 10/4

05:00-11:45

1 stop14h 45m

£659

Flights are sorted by cheapest return flights first.

Deals found on 20/3

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

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 13 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 £260). Flying from Seattle to Lisbon in June is currently the most expensive (average of £733). 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 £509, Delta can have you in Lisbon from Seattle in 20h 05m. 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 £260). Flying from Seattle to Lisbon in June is currently the most expensive (average of £733). 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
Setúbal
Oeiras
Fátima
Madeira
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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