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Cheap flights from Seattle to Lisbon from $301

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 11/8. 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

Icelandair Logo
7:00 pm - 9:20 pmSEA-LIS
18h 20m1 stop
Icelandair Logo
10:20 pm - 11:25 amLIS-SEA
21h 05m1 stop
$495Icelandair
Find Deal
Wed, Aug 20 - Sun, Aug 24
Icelandair Logo
2:35 pm - 8:20 pmSEA-LIS
21h 45m1 stop
Icelandair Logo
9:20 pm - 5:00 pmLIS-SEA
27h 40m1 stop
$508Icelandair
Find Deal
Sat, Nov 15 - Sun, Nov 23
United Airlines Logo
7:00 am - 8:55 amSEA-LIS
17h 55m2 stops
United Airlines Logo
11:20 am - 11:45 amLIS-SEA
32h 25m2 stops
$521United Airlines
Find Deal
Sat, Nov 15 - Sat, Nov 22
Lufthansa Logo
3:40 pm - 8:55 amSEA-LIS
33h 15m2 stops
Lufthansa Logo
5:00 am - 12:10 pmLIS-SEA
15h 10m1 stop
$522Lufthansa
Find Deal
Fri, Nov 14 - Mon, Nov 24
Air Canada Logo
8:00 pm - 9:20 amSEA-LIS
29h 20m2 stops
Air Canada Logo
5:00 am - 7:16 pmLIS-SEA
22h 16m2 stops
$523Air Canada
Find Deal
Wed, Nov 5 - Mon, Nov 24
United Airlines Logo
7:00 am - 8:10 amSEA-LIS
17h 10m2 stops
United Airlines Logo
11:20 am - 4:07 pmLIS-SEA
36h 47m2 stops
$526United Airlines
Find Deal
Sat, Dec 6 - Tue, Dec 16
Air Canada Logo
8:00 pm - 9:20 amSEA-LIS
30h 20m2 stops
Air Canada Logo
6:10 am - 7:16 pmLIS-SEA
21h 06m2 stops
$533Air Canada
Find Deal
Wed, Oct 29 - Tue, Nov 11
Lufthansa Logo
4:10 pm - 1:20 pmSEA-LIS
14h 10m1 stop
Lufthansa Logo
5:00 am - 12:10 pmLIS-SEA
15h 10m1 stop
$543Lufthansa
Find Deal
Wed, Oct 29 - Tue, Nov 11
Delta Logo
11:20 pm - 8:00 amSEA-LIS
24h 40m2 stops
Delta Logo
11:15 am - 10:13 pmLIS-SEA
18h 58m1 stop
$560Delta
Find Deal
Sat, Oct 18 - Wed, Nov 12
Delta Logo
11:20 pm - 8:00 amSEA-LIS
24h 40m2 stops
Delta Logo
5:30 am - 11:25 amLIS-SEA
13h 55m1 stop
$562Delta
Find Deal
Sat, Oct 18 - Tue, Nov 11

Aer Lingus flights from Seattle to Lisbon

Our best Aer Lingus deals on Seattle to Lisbon flight tickets
Aer Lingus
Sep 8
SEA7:35 pmSeattle/Tacoma Intl
18h 00m
1 stop
LIS9:35 pmLisbon Humberto Delgado
Sep 23
LIS10:15 pmLisbon Humberto Delgado
27h 35m
1 stop
SEA5:50 pmSeattle/Tacoma Intl
$568
Find similar
Aer Lingus
Aug 25
SEA7:35 pmSeattle/Tacoma Intl
18h 00m
1 stop
LIS9:35 pmLisbon Humberto Delgado
Sep 9
LIS10:15 pmLisbon Humberto Delgado
27h 35m
1 stop
SEA5:50 pmSeattle/Tacoma Intl
$571
Find similar
Aer Lingus
Aug 25
SEA7:35 pmSeattle/Tacoma Intl
18h 00m
1 stop
LIS9:35 pmLisbon Humberto Delgado
Sep 9
LIS10:15 pmLisbon Humberto Delgado
27h 35m
1 stop
SEA5:50 pmSeattle/Tacoma Intl
$579
Find similar

United Airlines flights from Seattle to Lisbon

Our best United Airlines deals on Seattle to Lisbon flight tickets
United Airlines
Nov 15
SEA8:00 amSeattle/Tacoma Intl
18h 15m
1 stop
LIS10:15 amLisbon Humberto Delgado
Nov 22
LIS11:20 amLisbon Humberto Delgado
32h 25m
2 stops
SEA11:45 amSeattle/Tacoma Intl
$521
Find similar
United Airlines
Dec 6
SEA7:00 amSeattle/Tacoma Intl
17h 10m
2 stops
LIS8:10 amLisbon Humberto Delgado
Dec 16
LIS11:20 amLisbon Humberto Delgado
36h 47m
2 stops
SEA4:07 pmSeattle/Tacoma Intl
$526
Find similar
United Airlines
Nov 15
SEA8:36 amSeattle/Tacoma Intl
15h 34m
2 stops
LIS8:10 amLisbon Humberto Delgado
Nov 24
LIS5:00 amLisbon Humberto Delgado
15h 10m
1 stop
SEA12:10 pmSeattle/Tacoma Intl
$527
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 August 5, 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 8/20

7:00 pm-9:20 pm

1 stop18h 20m

Lisbon Humberto Delgado

Sun 8/24

10:20 pm-11:25 am

1 stop21h 05m

$495

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 11/15

2:35 pm-8:20 pm

1 stop21h 45m

Lisbon Humberto Delgado

Sun 11/23

9:20 pm-5:00 pm

1 stop27h 40m

$508

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 11/15

7:00 am-8:55 am

2 stops17h 55m

Lisbon Humberto Delgado

Sat 11/22

11:20 am-11:45 am

2 stops32h 25m

$521

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 11/14

3:40 pm-8:55 am

2 stops33h 15m

Lisbon Humberto Delgado

Mon 11/24

5:00 am-12:10 pm

1 stop15h 10m

$522

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 11/5

8:00 pm-9:20 am

2 stops29h 20m

Lisbon Humberto Delgado

Mon 11/24

5:00 am-7:16 pm

2 stops22h 16m

$523

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 12/6

7:00 am-8:10 am

2 stops17h 10m

Lisbon Humberto Delgado

Tue 12/16

11:20 am-4:07 pm

2 stops36h 47m

$526

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 10/29

8:00 pm-9:20 am

2 stops30h 20m

Lisbon Humberto Delgado

Tue 11/11

6:10 am-7:16 pm

2 stops21h 06m

$533

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 10/29

4:10 pm-1:20 pm

1 stop14h 10m

Lisbon Humberto Delgado

Tue 11/11

5:00 am-12:10 pm

1 stop15h 10m

$543

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 10/18

11:20 pm-8:00 am

2 stops24h 40m

Lisbon Humberto Delgado

Wed 11/12

11:15 am-10:13 pm

1 stop18h 58m

$560

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 10/18

11:20 pm-8:00 am

2 stops24h 40m

Lisbon Humberto Delgado

Tue 11/11

5:30 am-11:25 am

1 stop13h 55m

$562

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, February 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 $755. If you are unable to visit Lisbon during the month of February, then departing from Seattle during the month January is also very affordable. Most momondo users find prices during this month for around $759.

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 $954 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 $840 on momondo.

How have Seattle to Lisbon flight prices changed over time?

As of August 2025, prices for Seattle to Lisbon flights are approximately 26% 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

Best Price Found

$301

Fastest flight time

13h 50m

Direct flights

None

Airports in Lisbon

1 airport
The best one-way flight to Lisbon from Seattle in the past 72 hours is $301. The best round-trip flight deal from Seattle to Lisbon found on momondo in the last 72 hours is $495.
The fastest flight from Seattle to Lisbon takes 13h 50m
There are no direct flights from Seattle to Lisbon. Popular non-direct route for this connection is Seattle/Tacoma Intl Airport - Lisbon Humberto Delgado Airport.
There is 1 airport near Lisbon: Lisbon Humberto Delgado (LIS)
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  • 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. 13h 50m 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 $466Free CancellationRating
7.0
524 reviews
Search Icelandair flights
British AirwaysPriceFrom $570Free CancellationRating
6.6
7,235 reviews
Search British Airways flights
LufthansaPriceFrom $611Free CancellationRating
6.8
7,286 reviews
Search Lufthansa flights
American AirlinesPriceFrom $621Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Turkish AirlinesPriceFrom $646Free CancellationRating
7.3
3,935 reviews
Search Turkish Airlines flights
Air FrancePriceFrom $646Free CancellationRating
7.5
1,466 reviews
Search Air France flights
Scandinavian AirlinesPriceFrom $652Free CancellationRating
7.4
1,462 reviews
Search Scandinavian Airlines flights
Aer LingusPriceFrom $660Free CancellationRating
7.1
1,197 reviews
Search Aer Lingus flights
KLMPriceFrom $668Free CancellationRating
7.8
1,381 reviews
Search KLM flights
United AirlinesPriceFrom $696Free CancellationRating
7.4
8,915 reviews
Search United Airlines flights

Traveling to a place near Lisbon?

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

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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