Cheap flights from Seattle to Lisbon from $319

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 2/21. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
7:00 am - 10:15 amSEA-LIS
19h 15m2 stops
United Airlines Logo
10:15 am - 8:54 pmLIS-SEA
18h 39m2 stops
$535United Airlines
Find Deal
Thu, Nov 13 - Wed, Nov 19
Lufthansa Logo
2:00 pm - 10:50 pmSEA-LIS
24h 50m1 stop
Lufthansa Logo
5:00 am - 12:10 pmLIS-SEA
15h 10m1 stop
$536Lufthansa
Find Deal
Fri, Nov 14 - Sat, Nov 22
Air Canada Logo
5:50 am - 8:55 amSEA-LIS
19h 05m2 stops
Air Canada Logo
10:50 am - 10:16 pmLIS-SEA
19h 26m1 stop
$537Air Canada
Find Deal
Sat, Nov 29 - Sun, Dec 14
British Airways Logo
7:50 pm - 12:10 pmSEA-LIS
33h 20m1 stop
British Airways Logo
7:20 am - 6:25 pmLIS-SEA
19h 05m1 stop
$538British Airways
Find Deal
Fri, Mar 20 - Thu, Apr 2
Lufthansa Logo
3:10 pm - 11:30 pmSEA-LIS
24h 20m1 stop
Lufthansa Logo
5:00 am - 12:10 pmLIS-SEA
15h 10m1 stop
$539Lufthansa
Find Deal
Sun, Nov 2 - Sat, Nov 15
Delta Logo
9:30 am - 11:20 amSEA-LIS
17h 50m2 stops
Delta Logo
5:00 am - 11:45 amLIS-SEA
14h 45m1 stop
$540Delta
Find Deal
Sat, Nov 15 - Sun, Nov 23
Delta Logo
1:40 pm - 11:20 amSEA-LIS
13h 40m1 stop
Delta Logo
5:30 am - 1:25 pmLIS-SEA
15h 55m1 stop
$541Delta
Find Deal
Sat, Nov 29 - Wed, Dec 17
Air Canada Logo
8:00 pm - 3:05 pmSEA-LIS
35h 05m2 stops
Air Canada Logo
11:20 am - 9:31 amLIS-SEA
29h 11m2 stops
$542Air Canada
Find Deal
Sat, Feb 28 - Mon, Mar 9
British Airways Logo
1:35 pm - 12:10 pmSEA-LIS
14h 35m1 stop
British Airways Logo
6:40 pm - 4:55 pmLIS-SEA
30h 15m1 stop
$559British Airways
Find Deal
Sat, Feb 28 - Sat, Mar 7
Icelandair Logo
2:35 pm - 8:20 pmSEA-LIS
21h 45m1 stop
Icelandair Logo
9:20 pm - 5:00 pmLIS-SEA
27h 40m1 stop
$592Icelandair
Find Deal
Sat, Nov 29 - Sun, Dec 14

United Airlines flights from Seattle to Lisbon

Our best United Airlines deals on Seattle to Lisbon flight tickets
United Airlines
Nov 13
SEA7:00 amSeattle/Tacoma Intl
19h 15m
2 stops
LIS10:15 amLisbon Humberto Delgado
Nov 19
LIS10:15 amLisbon Humberto Delgado
18h 39m
2 stops
SEA8:54 pmSeattle/Tacoma Intl
United Airlines
Nov 2
SEA3:10 pmSeattle/Tacoma Intl
24h 20m
1 stop
LIS11:30 pmLisbon Humberto Delgado
Nov 17
LIS5:00 amLisbon Humberto Delgado
15h 10m
1 stop
SEA12:10 pmSeattle/Tacoma Intl
United Airlines
Nov 2
SEA3:10 pmSeattle/Tacoma Intl
24h 20m
1 stop
LIS11:30 pmLisbon Humberto Delgado
Nov 12
LIS6:10 amLisbon Humberto Delgado
15h 10m
1 stop
SEA1:20 pmSeattle/Tacoma Intl

Lufthansa flights from Seattle to Lisbon

Our best Lufthansa deals on Seattle to Lisbon flight tickets
Lufthansa
Nov 2
SEA3:10 pmSeattle/Tacoma Intl
24h 20m
1 stop
LIS11:30 pmLisbon Humberto Delgado
Nov 11
LIS3:55 pmLisbon Humberto Delgado
29h 25m
2 stops
SEA1:20 pmSeattle/Tacoma Intl
Lufthansa
Nov 14
SEA2:00 pmSeattle/Tacoma Intl
24h 50m
1 stop
LIS10:50 pmLisbon Humberto Delgado
Nov 22
LIS5:00 amLisbon Humberto Delgado
15h 10m
1 stop
SEA12:10 pmSeattle/Tacoma Intl
Lufthansa
Nov 2
SEA3:10 pmSeattle/Tacoma Intl
24h 20m
1 stop
LIS11:30 pmLisbon Humberto Delgado
Nov 15
LIS5:00 amLisbon Humberto Delgado
15h 10m
1 stop
SEA12:10 pmSeattle/Tacoma Intl

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 October 20, 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

Thu 11/13

7:00 am-10:15 am

2 stops19h 15m

Lisbon Humberto Delgado

Wed 11/19

10:15 am-8:54 pm

2 stops18h 39m

$535

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 11/14

2:00 pm-10:50 pm

1 stop24h 50m

Lisbon Humberto Delgado

Sat 11/22

5:00 am-12:10 pm

1 stop15h 10m

$536

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 11/29

5:50 am-8:55 am

2 stops19h 05m

Lisbon Humberto Delgado

Sun 12/14

10:50 am-10:16 pm

1 stop19h 26m

$537

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 3/20

7:50 pm-12:10 pm

1 stop33h 20m

Lisbon Humberto Delgado

Thu 4/2

7:20 am-6:25 pm

1 stop19h 05m

$538

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 11/2

3:10 pm-11:30 pm

1 stop24h 20m

Lisbon Humberto Delgado

Sat 11/15

5:00 am-12:10 pm

1 stop15h 10m

$539

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 11/15

9:30 am-11:20 am

2 stops17h 50m

Lisbon Humberto Delgado

Sun 11/23

5:00 am-11:45 am

1 stop14h 45m

$540

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 11/29

1:40 pm-11:20 am

1 stop13h 40m

Lisbon Humberto Delgado

Wed 12/17

5:30 am-1:25 pm

1 stop15h 55m

$541

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 2/28

8:00 pm-3:05 pm

2 stops35h 05m

Lisbon Humberto Delgado

Mon 3/9

11:20 am-9:31 am

2 stops29h 11m

$542

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 2/28

1:35 pm-12:10 pm

1 stop14h 35m

Lisbon Humberto Delgado

Sat 3/7

6:40 pm-4:55 pm

1 stop30h 15m

$559

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 11/29

2:35 pm-8:20 pm

1 stop21h 45m

Lisbon Humberto Delgado

Sun 12/14

9:20 pm-5:00 pm

1 stop27h 40m

$592

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 $717. 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 $731.

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 $921 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 $795 on momondo.

Can stopping save me money on Seattle to Lisbon flights?

You could potentially save up to 18% 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 October 2025, prices for Seattle to Lisbon flights are approximately 28% 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

Direct flights

None
There are no direct flights from Seattle to Lisbon. There are no popular flight routes from Seattle to Lisbon.
  • 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 40m 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
561 reviews
Search Icelandair flights
LufthansaPriceFrom $517Free CancellationRating
6.8
7,508 reviews
Search Lufthansa flights
Air CanadaPriceFrom $543Free CancellationRating
7.1
10,337 reviews
Search Air Canada flights
United AirlinesPriceFrom $554Free CancellationRating
7.4
8,991 reviews
Search United Airlines flights
British AirwaysPriceFrom $559Free CancellationRating
6.7
7,461 reviews
Search British Airways flights
Air FrancePriceFrom $560Free CancellationRating
7.4
1,475 reviews
Search Air France flights
American AirlinesPriceFrom $627Free CancellationRating
7.2
11,024 reviews
Search American Airlines flights
Aer LingusPriceFrom $627Free CancellationRating
7.2
1,348 reviews
Search Aer Lingus flights
KLMPriceFrom $632Free CancellationRating
7.7
1,404 reviews
Search KLM flights
Turkish AirlinesPriceFrom $654Free CancellationRating
7.3
4,022 reviews
Search Turkish Airlines flights

Traveling to a place near Lisbon?

Book flights to Lisbon if you plan to visit one of these locations
Sintra
Fátima
Ericeira
Nazaré
Oeiras
Setúbal
Peniche
Almada
Estoril
Leiria
Sesimbra
Tomar
Evora
Zambujeira do Mar
Batalha
Figueira da Foz
Óbidos
Torres Vedras
Comporta
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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1 adult
Wed 11/19
Wed 11/26

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