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Cheap flights from Seattle to Lisbon from $260

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Lisbon departing on 1/31. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Seattle to Lisbon

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
11:59 pm - 9:20 am
SEA
-
LIS
26h 21m2 stops
United Airlines Logo
11:55 am - 10:59 pm
LIS
-
SEA
42h 04m2 stops
$483United Airlines
Sun, Mar 8 - Thu, Mar 19
Air Canada Logo
8:00 pm - 11:00 am
SEA
-
LIS
55h 00m2 stops
Air Canada Logo
1:00 pm - 9:51 pm
LIS
-
SEA
16h 51m1 stop
$484Air Canada
Fri, Apr 17 - Sun, Apr 26
United Airlines Logo
8:00 am - 10:30 am
SEA
-
LIS
18h 30m1 stop
United Airlines Logo
5:05 am - 12:20 pm
LIS
-
SEA
15h 15m1 stop
$485United Airlines
Fri, May 1 - Sat, May 9
British Airways Logo
1:35 pm - 6:10 pm
SEA
-
LIS
20h 35m1 stop
British Airways Logo
7:10 am - 11:35 am
LIS
-
SEA
36h 25m1 stop
$486British Airways
Thu, Apr 16 - Mon, Apr 27
United Airlines Logo
7:00 am - 11:30 am
SEA
-
LIS
20h 30m2 stops
United Airlines Logo
10:55 am - 7:03 pm
LIS
-
SEA
40h 08m2 stops
$487United Airlines
Fri, Feb 6 - Fri, Feb 13
Delta Logo
7:30 am - 8:00 am
SEA
-
LIS
16h 30m1 stop
Delta Logo
5:00 am - 12:35 pm
LIS
-
SEA
14h 35m1 stop
$488Delta
Thu, Mar 5 - Thu, Mar 19
British Airways Logo
6:12 am - 9:05 am
SEA
-
LIS
18h 53m1 stop
British Airways Logo
12:55 pm - 4:55 pm
LIS
-
SEA
36h 00m1 stop
$489British Airways
Thu, Feb 5 - Thu, Feb 12
United Airlines Logo
7:00 am - 8:20 am
SEA
-
LIS
17h 20m2 stops
United Airlines Logo
5:05 am - 12:20 pm
LIS
-
SEA
15h 15m1 stop
$490United Airlines
Tue, Apr 21 - Mon, Apr 27
Delta Logo
11:17 am - 3:10 pm
SEA
-
LIS
19h 53m2 stops
Delta Logo
5:00 am - 11:40 am
LIS
-
SEA
14h 40m1 stop
$492Delta
Sat, Feb 7 - Sat, Feb 14
Delta Logo
1:40 pm - 5:30 pm
SEA
-
LIS
19h 50m1 stop
Delta Logo
5:30 am - 11:25 am
LIS
-
SEA
13h 55m1 stop
$493Delta
Sat, Feb 21 - Sat, Feb 28

United Airlines flights from Seattle to Lisbon

Our best United Airlines deals on Seattle to Lisbon flight tickets
United Airlines
Mar 8
SEA11:59 pmSeattle/Tacoma Intl
26h 21m
2 stops
LIS9:20 amLisbon Humberto Delgado
Mar 19
LIS11:55 amLisbon Humberto Delgado
42h 04m
2 stops
SEA10:59 pmSeattle/Tacoma Intl
$483
United Airlines
May 1
SEA8:00 amSeattle/Tacoma Intl
18h 30m
1 stop
LIS10:30 amLisbon Humberto Delgado
May 9
LIS5:05 amLisbon Humberto Delgado
15h 15m
1 stop
SEA12:20 pmSeattle/Tacoma Intl
$485
United Airlines
Feb 6
SEA7:00 amSeattle/Tacoma Intl
20h 30m
2 stops
LIS11:30 amLisbon Humberto Delgado
Feb 13
LIS10:55 amLisbon Humberto Delgado
40h 08m
2 stops
SEA7:03 pmSeattle/Tacoma Intl
$487

British Airways flights from Seattle to Lisbon

Our best British Airways deals on Seattle to Lisbon flight tickets
British Airways
Apr 16
SEA1:35 pmSeattle/Tacoma Intl
20h 35m
1 stop
LIS6:10 pmLisbon Humberto Delgado
Apr 27
LIS7:10 amLisbon Humberto Delgado
36h 25m
1 stop
SEA11:35 amSeattle/Tacoma Intl
$486
British Airways
Feb 5
SEA6:12 amSeattle/Tacoma Intl
18h 53m
1 stop
LIS9:05 amLisbon Humberto Delgado
Feb 12
LIS12:55 pmLisbon Humberto Delgado
36h 00m
1 stop
SEA4:55 pmSeattle/Tacoma Intl
$489
British Airways
Apr 23
SEA8:20 pmSeattle/Tacoma Intl
18h 45m
1 stop
LIS11:05 pmLisbon Humberto Delgado
May 8
LIS7:20 amLisbon Humberto Delgado
23h 06m
2 stops
SEA10:26 pmSeattle/Tacoma Intl
$495

momondo Fare Finder

 
Customize 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, momondo users made 832,500 searches. Data last updated January 8, 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

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 3/8

11:59 pm-9:20 am

2 stops26h 21m

Lisbon Humberto Delgado

Thu 3/19

11:55 am-10:59 pm

2 stops42h 04m

$483

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 4/17

8:00 pm-11:00 am

2 stops55h 00m

Lisbon Humberto Delgado

Sun 4/26

1:00 pm-9:51 pm

1 stop16h 51m

$484

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 5/1

8:00 am-10:30 am

1 stop18h 30m

Lisbon Humberto Delgado

Sat 5/9

5:05 am-12:20 pm

1 stop15h 15m

$485

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 4/16

1:35 pm-6:10 pm

1 stop20h 35m

Lisbon Humberto Delgado

Mon 4/27

7:10 am-11:35 am

1 stop36h 25m

$486

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 2/6

7:00 am-11:30 am

2 stops20h 30m

Lisbon Humberto Delgado

Fri 2/13

10:55 am-7:03 pm

2 stops40h 08m

$487

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 3/5

7:30 am-8:00 am

1 stop16h 30m

Lisbon Humberto Delgado

Thu 3/19

5:00 am-12:35 pm

1 stop14h 35m

$488

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 2/5

6:12 am-9:05 am

1 stop18h 53m

Lisbon Humberto Delgado

Thu 2/12

12:55 pm-4:55 pm

1 stop36h 00m

$489

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 4/21

7:00 am-8:20 am

2 stops17h 20m

Lisbon Humberto Delgado

Mon 4/27

5:05 am-12:20 pm

1 stop15h 15m

$490

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 2/7

11:17 am-3:10 pm

2 stops19h 53m

Lisbon Humberto Delgado

Sat 2/14

5:00 am-11:40 am

1 stop14h 40m

$492

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 2/21

1:40 pm-5:30 pm

1 stop19h 50m

Lisbon Humberto Delgado

Sat 2/28

5:30 am-11:25 am

1 stop13h 55m

$493

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Lisbon from

How to get the cheapest flight ticket from Seattle to Lisbon

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Lisbon?

In general, January is the cheapest month to fly from Seattle to Lisbon. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $504. If you are unable to visit Lisbon during the month of January, then departing from Seattle during the month November is also very affordable. Most momondo users find prices during this month for around $594.

How far in advance should I book a flight to Lisbon?

You are more likely to see cheaper flights to Lisbon from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Lisbon for around $846 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Lisbon from Seattle for as low as $723 on momondo.

Can stopping save me money on Seattle to Lisbon flights?

You could potentially save up to 22% on your flight if you consider stops on a Seattle to Lisbon flight.

How have Seattle to Lisbon flight prices changed over time?

As of January 2026, prices for Seattle to Lisbon flights are approximately 24% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to Lisbon

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Lisbon according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Lisbon (SEA to LIS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Lisbon

Fastest flight time

14h 10m

Direct flights

None
The fastest flight from Seattle to Lisbon takes 14h 10m
There are no direct flights from Seattle to Lisbon. There are no popular flight routes from Seattle to Lisbon.
Search flight deals

  • How far is Seattle/Tacoma Intl to Lisbon Humberto Delgado by plane?

    The straight-line distance from Seattle/Tacoma Intl to Lisbon Humberto Delgado is 5195.1 mi. 14h 10m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Lisbon Humberto Delgado Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to Lisbon Humberto Delgado Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Lisbon Humberto Delgado Airport?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Lisbon Humberto Delgado Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Lisbon Humberto Delgado Airport.

  • What documentation or ID do you need to fly to Lisbon Humberto Delgado Airport?

    The travel and health documents you'll need for your trip to Lisbon Humberto Delgado Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Lisbon Humberto Delgado Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Seattle to Lisbon?

Best airlines flying from Seattle to Lisbon

Compare and see reviews for airlines that fly from Seattle to Lisbon with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom $352Free CancellationRating
7.1
593 reviews
Search Icelandair flights
LufthansaPriceFrom $494Free CancellationRating
6.8
7,692 reviews
Search Lufthansa flights
British AirwaysPriceFrom $499Free CancellationRating
6.7
7,657 reviews
Search British Airways flights
United AirlinesPriceFrom $507Free CancellationRating
7.4
9,139 reviews
Search United Airlines flights
Air CanadaPriceFrom $543Free CancellationRating
7.1
10,603 reviews
Search Air Canada flights
Air FrancePriceFrom $553Free CancellationRating
7.4
1,519 reviews
Search Air France flights
American AirlinesPriceFrom $558Free CancellationRating
7.2
11,095 reviews
Search American Airlines flights
KLMPriceFrom $560Free CancellationRating
7.7
1,434 reviews
Search KLM flights
SWISSPriceFrom $562Free CancellationRating
7.5
1,840 reviews
Search SWISS flights
Scandinavian AirlinesPriceFrom $576Free CancellationRating
7.3
1,635 reviews
Search Scandinavian Airlines flights

Traveling to a place near Lisbon?

Book flights to Lisbon if you plan to visit one of these locations
Sintra
Ericeira
Fátima
Nazaré
Setúbal
Estoril
Peniche
Leiria
Oeiras
Sesimbra
Tomar
Evora
Figueira da Foz
Zambujeira do Mar
Batalha
Torres Vedras
Óbidos
Comporta
Sines
Almada

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Lisbon?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Lisbon from Seattle.

Can I find flights from Seattle to Lisbon with flexible booking policies on momondo?

Yes. All flights to Lisbon from Seattle on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Seattle to Lisbon?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Lisbon from Seattle.

I’m not ready to book a flight from Seattle to Lisbon right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Seattle to Lisbon flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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