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Cheap flights from Seattle to Lisbon from $270

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 1/14. 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
7:00 am - 8:10 am
SEA
-
LIS
17h 10m2 stops
United Airlines Logo
6:10 am - 2:20 pm
LIS
-
SEA
15h 10m1 stop
$481United Airlines
Mon, Mar 2 - Wed, Mar 11
Lufthansa Logo
8:00 pm - 9:20 am
SEA
-
LIS
29h 20m2 stops
Lufthansa Logo
5:00 am - 12:10 pm
LIS
-
SEA
15h 10m1 stop
$482Lufthansa
Wed, Jan 28 - Sat, Feb 7
United Airlines Logo
8:40 am - 8:10 am
SEA
-
LIS
15h 30m2 stops
United Airlines Logo
5:00 am - 12:10 pm
LIS
-
SEA
15h 10m1 stop
$483United Airlines
Fri, Jan 23 - Thu, Jan 29
Delta Logo
7:10 am - 9:00 am
SEA
-
LIS
17h 50m1 stop
Delta Logo
5:00 am - 12:35 pm
LIS
-
SEA
14h 35m1 stop
$484Delta
Mon, Mar 2 - Wed, Mar 11
United Airlines Logo
7:00 am - 8:10 am
SEA
-
LIS
17h 10m2 stops
United Airlines Logo
6:10 am - 1:20 pm
LIS
-
SEA
15h 10m1 stop
$485United Airlines
Fri, Jan 23 - Fri, Jan 30
United Airlines Logo
8:40 am - 8:10 am
SEA
-
LIS
15h 30m2 stops
United Airlines Logo
11:20 am - 10:43 pm
LIS
-
SEA
43h 23m3 stops
$486United Airlines
Wed, Jan 21 - Thu, Jan 29
Lufthansa Logo
3:10 pm - 7:55 pm
SEA
-
LIS
20h 45m1 stop
Lufthansa Logo
5:00 am - 1:10 pm
LIS
-
SEA
15h 10m1 stop
$487Lufthansa
Sun, Mar 1 - Tue, Mar 10
Delta Logo
2:15 pm - 3:10 pm
SEA
-
LIS
16h 55m1 stop
Delta Logo
5:00 am - 11:35 am
LIS
-
SEA
14h 35m1 stop
$488Delta
Fri, Feb 27 - Sat, Mar 7
United Airlines Logo
8:40 am - 8:10 am
SEA
-
LIS
15h 30m2 stops
United Airlines Logo
11:20 am - 6:14 pm
LIS
-
SEA
38h 54m2 stops
$489United Airlines
Fri, Jan 23 - Fri, Jan 30
Delta Logo
7:10 am - 11:20 am
SEA
-
LIS
20h 10m2 stops
Delta Logo
11:25 am - 11:40 am
LIS
-
SEA
32h 15m1 stop
$490Delta
Thu, Jan 29 - Tue, Feb 3

Delta flights from Seattle to Lisbon

Our best Delta deals on Seattle to Lisbon flight tickets
Delta
Mar 2
SEA11:15 pmSeattle/Tacoma Intl
24h 45m
2 stops
LIS8:00 amLisbon Humberto Delgado
Mar 10
LIS5:00 amLisbon Humberto Delgado
14h 35m
1 stop
SEA12:35 pmSeattle/Tacoma Intl
$482
Find similar
Delta
Mar 3
SEA6:00 amSeattle/Tacoma Intl
18h 00m
2 stops
LIS8:00 amLisbon Humberto Delgado
Mar 10
LIS5:00 amLisbon Humberto Delgado
14h 35m
1 stop
SEA12:35 pmSeattle/Tacoma Intl
$483
Find similar
Delta
Mar 2
SEA7:10 amSeattle/Tacoma Intl
17h 50m
1 stop
LIS9:00 amLisbon Humberto Delgado
Mar 12
LIS11:25 amLisbon Humberto Delgado
32h 10m
1 stop
SEA12:35 pmSeattle/Tacoma Intl
$484
Find similar

Air Canada flights from Seattle to Lisbon

Our best Air Canada deals on Seattle to Lisbon flight tickets
Air Canada
Mar 4
SEA3:40 pmSeattle/Tacoma Intl
32h 15m
2 stops
LIS7:55 amLisbon Humberto Delgado
Mar 9
LIS11:20 amLisbon Humberto Delgado
38h 56m
2 stops
SEA7:16 pmSeattle/Tacoma Intl
$501
Find similar
Air Canada
Dec 29
SEA3:40 pmSeattle/Tacoma Intl
57h 15m
2 stops
LIS8:55 amLisbon Humberto Delgado
Jan 14
LIS11:20 amLisbon Humberto Delgado
18h 46m
2 stops
SEA10:06 pmSeattle/Tacoma Intl
$513
Find similar
Air Canada
Dec 12
SEA8:10 amSeattle/Tacoma Intl
17h 10m
1 stop
LIS9:20 amLisbon Humberto Delgado
Dec 14
LIS10:50 amLisbon Humberto Delgado
30h 41m
2 stops
SEA9:31 amSeattle/Tacoma Intl
$1,103
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 11, 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

Mon 3/2

7:00 am-8:10 am

2 stops17h 10m

Lisbon Humberto Delgado

Wed 3/11

6:10 am-2:20 pm

1 stop15h 10m

$481

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 1/28

8:00 pm-9:20 am

2 stops29h 20m

Lisbon Humberto Delgado

Sat 2/7

5:00 am-12:10 pm

1 stop15h 10m

$482

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 1/23

8:40 am-8:10 am

2 stops15h 30m

Lisbon Humberto Delgado

Thu 1/29

5:00 am-12:10 pm

1 stop15h 10m

$483

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 3/2

7:10 am-9:00 am

1 stop17h 50m

Lisbon Humberto Delgado

Wed 3/11

5:00 am-12:35 pm

1 stop14h 35m

$484

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 1/23

7:00 am-8:10 am

2 stops17h 10m

Lisbon Humberto Delgado

Fri 1/30

6:10 am-1:20 pm

1 stop15h 10m

$485

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 1/21

8:40 am-8:10 am

2 stops15h 30m

Lisbon Humberto Delgado

Thu 1/29

11:20 am-10:43 pm

3 stops43h 23m

$486

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 3/1

3:10 pm-7:55 pm

1 stop20h 45m

Lisbon Humberto Delgado

Tue 3/10

5:00 am-1:10 pm

1 stop15h 10m

$487

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 2/27

2:15 pm-3:10 pm

1 stop16h 55m

Lisbon Humberto Delgado

Sat 3/7

5:00 am-11:35 am

1 stop14h 35m

$488

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 1/23

8:40 am-8:10 am

2 stops15h 30m

Lisbon Humberto Delgado

Fri 1/30

11:20 am-6:14 pm

2 stops38h 54m

$489

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 1/29

7:10 am-11:20 am

2 stops20h 10m

Lisbon Humberto Delgado

Tue 2/3

11:25 am-11:40 am

1 stop32h 15m

$490

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 $589. 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 day to depart on your flight to Lisbon?

Our data shows that Monday is the least expensive day to fly to Lisbon. Tickets to fly out on this day can be as low as $908. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from Seattle to Lisbon for around $1,111.

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 $880 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 38% 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

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 $356Free CancellationRating
7.0
589 reviews
Search Icelandair flights
United AirlinesPriceFrom $514Free CancellationRating
7.4
9,094 reviews
Search United Airlines flights
LufthansaPriceFrom $516Free CancellationRating
6.8
7,626 reviews
Search Lufthansa flights
British AirwaysPriceFrom $525Free CancellationRating
6.7
7,571 reviews
Search British Airways flights
Air CanadaPriceFrom $543Free CancellationRating
7.1
10,517 reviews
Search Air Canada flights
Air FrancePriceFrom $553Free CancellationRating
7.4
1,504 reviews
Search Air France flights
American AirlinesPriceFrom $558Free CancellationRating
7.2
11,049 reviews
Search American Airlines flights
KLMPriceFrom $560Free CancellationRating
7.7
1,432 reviews
Search KLM flights
SWISSPriceFrom $562Free CancellationRating
7.5
1,810 reviews
Search SWISS flights
Scandinavian AirlinesPriceFrom $576Free CancellationRating
7.4
1,605 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
Oeiras
Setúbal
Peniche
Estoril
Leiria
Sesimbra
Tomar
Almada
Evora
Figueira da Foz
Zambujeira do Mar
Batalha
Comporta
Torres Vedras
Sines
Óbidos

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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