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Cheap flights from Seattle to Lisbon from $252

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.
Lufthansa Logo
3:40 pm - 7:55 am
SEA
-
LIS
32h 15m2 stops
Lufthansa Logo
5:00 am - 1:10 pm
LIS
-
SEA
15h 10m1 stop
$483Lufthansa
Wed, Mar 4 - Tue, Mar 17
United Airlines Logo
9:00 am - 8:10 am
SEA
-
LIS
15h 10m2 stops
United Airlines Logo
5:00 am - 12:10 pm
LIS
-
SEA
15h 10m1 stop
$484United Airlines
Tue, Feb 24 - Sat, Mar 7
Multiple Airlines Logo
3:40 pm - 7:55 am
SEA
-
LIS
56h 15m2 stops
Multiple Airlines Logo
6:10 am - 2:20 pm
LIS
-
SEA
15h 10m1 stop
$485Multiple Airlines
Tue, Mar 3 - Wed, Mar 11
United Airlines Logo
8:10 am - 9:20 am
SEA
-
LIS
18h 10m1 stop
United Airlines Logo
5:00 am - 1:10 pm
LIS
-
SEA
15h 10m1 stop
$486United Airlines
Sun, Mar 8 - Mon, Mar 16
KLM Logo
7:10 am - 8:55 am
SEA
-
LIS
17h 45m1 stop
KLM Logo
11:25 am - 11:35 am
LIS
-
SEA
32h 10m1 stop
$487KLM
Sun, Feb 22 - Sun, Mar 1
Air Canada Logo
8:10 am - 9:20 am
SEA
-
LIS
17h 10m1 stop
Air Canada Logo
6:10 am - 10:06 pm
LIS
-
SEA
23h 56m2 stops
$488Air Canada
Fri, Jan 23 - Fri, Jan 30
United Airlines Logo
11:59 pm - 10:15 am
SEA
-
LIS
26h 16m2 stops
United Airlines Logo
5:00 am - 1:10 pm
LIS
-
SEA
15h 10m1 stop
$489United Airlines
Sun, Mar 1 - Tue, Mar 10
Air Canada Logo
3:40 pm - 7:55 am
SEA
-
LIS
32h 15m2 stops
Air Canada Logo
5:00 am - 10:16 pm
LIS
-
SEA
48h 16m2 stops
$490Air Canada
Wed, Mar 4 - Tue, Mar 10
Delta Logo
7:10 am - 3:10 pm
SEA
-
LIS
24h 00m2 stops
Delta Logo
11:25 am - 11:40 am
LIS
-
SEA
32h 15m1 stop
$491Delta
Sat, Jan 31 - Mon, Feb 9
Multiple Airlines Logo
7:10 am - 8:55 am
SEA
-
LIS
17h 45m1 stop
Multiple Airlines Logo
5:30 am - 1:05 pm
LIS
-
SEA
15h 35m1 stop
$492Multiple Airlines
Sun, Feb 22 - Sun, Mar 8

United Airlines flights from Seattle to Lisbon

Our best United Airlines deals on Seattle to Lisbon flight tickets
United Airlines
Feb 24
SEA9:00 amSeattle/Tacoma Intl
15h 10m
2 stops
LIS8:10 amLisbon Humberto Delgado
Mar 7
LIS5:00 amLisbon Humberto Delgado
15h 10m
1 stop
SEA12:10 pmSeattle/Tacoma Intl
$484
Find similar
United Airlines
Mar 8
SEA8:10 amSeattle/Tacoma Intl
18h 10m
1 stop
LIS9:20 amLisbon Humberto Delgado
Mar 16
LIS5:00 amLisbon Humberto Delgado
15h 10m
1 stop
SEA1:10 pmSeattle/Tacoma Intl
$486
Find similar
United Airlines
Mar 1
SEA11:59 pmSeattle/Tacoma Intl
26h 16m
2 stops
LIS10:15 amLisbon Humberto Delgado
Mar 10
LIS5:00 amLisbon Humberto Delgado
15h 10m
1 stop
SEA1:10 pmSeattle/Tacoma Intl
$489
Find similar

Delta flights from Seattle to Lisbon

Our best Delta deals on Seattle to Lisbon flight tickets
Delta
Jan 31
SEA7:10 amSeattle/Tacoma Intl
24h 00m
2 stops
LIS3:10 pmLisbon Humberto Delgado
Feb 9
LIS11:25 amLisbon Humberto Delgado
32h 15m
1 stop
SEA11:40 amSeattle/Tacoma Intl
$491
Find similar
Delta
Feb 18
SEA11:17 amSeattle/Tacoma Intl
19h 53m
2 stops
LIS3:10 pmLisbon Humberto Delgado
Feb 27
LIS5:00 amLisbon Humberto Delgado
22h 00m
2 stops
SEA7:00 pmSeattle/Tacoma Intl
$501
Find similar
Delta
Feb 26
SEA1:40 pmSeattle/Tacoma Intl
17h 30m
1 stop
LIS3:10 pmLisbon Humberto Delgado
Mar 5
LIS5:30 amLisbon Humberto Delgado
19h 18m
2 stops
SEA4:48 pmSeattle/Tacoma Intl
$502
Find similar

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 December 28, 2025.
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

Wed 3/4

3:40 pm-7:55 am

2 stops32h 15m

Lisbon Humberto Delgado

Tue 3/17

5:00 am-1:10 pm

1 stop15h 10m

$483

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 2/24

9:00 am-8:10 am

2 stops15h 10m

Lisbon Humberto Delgado

Sat 3/7

5:00 am-12:10 pm

1 stop15h 10m

$484

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 3/3

3:40 pm-7:55 am

2 stops56h 15m

Lisbon Humberto Delgado

Wed 3/11

6:10 am-2:20 pm

1 stop15h 10m

$485

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 3/8

8:10 am-9:20 am

1 stop18h 10m

Lisbon Humberto Delgado

Mon 3/16

5:00 am-1:10 pm

1 stop15h 10m

$486

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 2/22

7:10 am-8:55 am

1 stop17h 45m

Lisbon Humberto Delgado

Sun 3/1

11:25 am-11:35 am

1 stop32h 10m

$487

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 1/23

8:10 am-9:20 am

1 stop17h 10m

Lisbon Humberto Delgado

Fri 1/30

6:10 am-10:06 pm

2 stops23h 56m

$488

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 3/1

11:59 pm-10:15 am

2 stops26h 16m

Lisbon Humberto Delgado

Tue 3/10

5:00 am-1:10 pm

1 stop15h 10m

$489

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 3/4

3:40 pm-7:55 am

2 stops32h 15m

Lisbon Humberto Delgado

Tue 3/10

5:00 am-10:16 pm

2 stops48h 16m

$490

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 1/31

7:10 am-3:10 pm

2 stops24h 00m

Lisbon Humberto Delgado

Mon 2/9

11:25 am-11:40 am

1 stop32h 15m

$491

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 2/22

7:10 am-8:55 am

1 stop17h 45m

Lisbon Humberto Delgado

Sun 3/8

5:30 am-1:05 pm

1 stop15h 35m

$492

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 typical price of a round-trip flight between Seattle and Lisbon?

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 $588. 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 $602.

What is the cheapest time of day to depart on your flight to Lisbon?

The cheapest time of day to fly to Lisbon is in the afternoon when flights can be purchased for as low as $959. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $1,074 on average. Flights to Lisbon from Seattle at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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 $879 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 $729 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 December 2025, prices for Seattle to Lisbon flights are approximately 40% 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

15h 45m

Direct flights

None
The fastest flight from Seattle to Lisbon takes 15h 45m
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. 15h 45m 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 $353Free CancellationRating
7.0
592 reviews
Search Icelandair flights
LufthansaPriceFrom $495Free CancellationRating
6.8
7,659 reviews
Search Lufthansa flights
British AirwaysPriceFrom $507Free CancellationRating
6.7
7,616 reviews
Search British Airways flights
United AirlinesPriceFrom $509Free CancellationRating
7.4
9,114 reviews
Search United Airlines flights
Air CanadaPriceFrom $543Free CancellationRating
7.1
10,562 reviews
Search Air Canada flights
Air FrancePriceFrom $553Free CancellationRating
7.4
1,515 reviews
Search Air France flights
American AirlinesPriceFrom $558Free CancellationRating
7.2
11,071 reviews
Search American Airlines flights
KLMPriceFrom $560Free CancellationRating
7.7
1,435 reviews
Search KLM flights
SWISSPriceFrom $562Free CancellationRating
7.5
1,832 reviews
Search SWISS flights
Scandinavian AirlinesPriceFrom $576Free CancellationRating
7.4
1,630 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
Peniche
Estoril
Leiria
Oeiras
Sesimbra
Tomar
Evora
Figueira da Foz
Zambujeira do Mar
Batalha
Comporta
Torres Vedras
Óbidos
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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