Which airport is the most popular layover for flights between Seattle and Lisbon?

London (LHR) was the most common stop: 46% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport has the shortest connection time from Seattle to Lisbon?

Munich (MUC) has the shortest average layover time for this route: 1h 23m.

Which layover airport offers the lowest fares from Seattle to Lisbon?

Flights via Munich (MUC) offer the lowest average round-trip price of $518.

Which layover airport has the shortest travel time from Seattle to Lisbon?

Flights connecting via Munich (MUC) have the shortest average one-way travel time: 14h 39m.

What is the cheapest airline that flies from Seattle/Tacoma Intl to Lisbon Humberto Delgado?

United Airlines and British Airways are the most popular carriers operating from Seattle/Tacoma Intl to Lisbon Humberto Delgado

What airlines fly to Lisbon?

British Airways, United Airlines and Delta are the top three most popular airlines that fly to Lisbon from Seattle according to our data. British Airways is the first choice among our users, with 39% of people opting to fly with this airline when traveling to Lisbon. Keep in mind that there are 13 different airlines that fly to Lisbon on a routine basis, so you have a few additional options to choose from.

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?

The number of operators available for flights from Seattle/Tacoma Intl Airport to Lisbon Humberto Delgado Airport is 13 as of March 2026.

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.

$254 Cheap Flights from Seattle to Lisbon in 2026

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Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

8:20 pm - 11:00 pm

SEA

LIS

18h 40m

1 stop

12:30 pm - 12:44 am

LIS

SEA

20h 14m

2 stops

$494Multiple Airlines

Tue, Apr 14 - Wed, Apr 22

1:35 pm - 2:30 pm

SEA

LIS

16h 55m

1 stop

4:25 pm - 11:35 am

LIS

SEA

27h 10m

1 stop

$501British Airways

Tue, Apr 21 - Wed, Apr 29

8:20 pm - 11:05 pm

SEA

LIS

18h 45m

1 stop

12:30 pm - 12:44 am

LIS

SEA

20h 14m

2 stops

$504Multiple Airlines

Sun, Apr 12 - Wed, Apr 22

11:59 pm - 10:45 pm

SEA

LIS

38h 46m

2 stops

6:15 am - 6:35 pm

LIS

SEA

20h 20m

2 stops

$505United Airlines

Wed, Apr 22 - Wed, Apr 29

8:20 pm - 11:00 pm

SEA

LIS

18h 40m

1 stop

6:45 pm - 6:25 pm

LIS

SEA

31h 40m

1 stop

$506British Airways

Tue, Apr 7 - Wed, Apr 15

8:20 pm - 10:05 am

SEA

LIS

29h 45m

1 stop

4:25 pm - 11:35 am

LIS

SEA

27h 10m

1 stop

$507British Airways

Sun, Apr 12 - Sat, Apr 25

1:35 pm - 11:05 pm

SEA

LIS

25h 30m

1 stop

1:40 pm - 11:35 am

LIS

SEA

29h 55m

1 stop

$508American Airlines

Sun, Apr 19 - Tue, May 5

8:20 pm - 11:10 pm

SEA

LIS

18h 50m

1 stop

7:20 am - 11:35 am

LIS

SEA

36h 15m

1 stop

$510American Airlines

Mon, Apr 20 - Wed, May 6

8:20 pm - 11:00 pm

SEA

LIS

18h 40m

1 stop

11:05 am - 9:23 pm

LIS

SEA

18h 18m

1 stop

$511British Airways

Tue, Apr 7 - Wed, Apr 15

8:20 pm - 3:45 pm

SEA

LIS

35h 25m

1 stop

6:45 pm - 11:35 am

LIS

SEA

24h 50m

1 stop

$512British Airways

Sun, Apr 12 - Tue, Apr 28

British Airways flights from Seattle to Lisbon

Our best British Airways deals on Seattle to Lisbon flight tickets

British Airways

Apr 21

SEA1:35 pmSeattle/Tacoma Intl

16h 55m

1 stop

LIS2:30 pmLisbon Humberto Delgado

Apr 29

LIS4:25 pmLisbon Humberto Delgado

27h 10m

1 stop

SEA11:35 amSeattle/Tacoma Intl

$501

British Airways

Apr 7

SEA8:20 pmSeattle/Tacoma Intl

18h 40m

1 stop

LIS11:00 pmLisbon Humberto Delgado

Apr 15

LIS6:45 pmLisbon Humberto Delgado

31h 40m

1 stop

SEA6:25 pmSeattle/Tacoma Intl

$506

British Airways

Apr 12

SEA8:20 pmSeattle/Tacoma Intl

29h 45m

1 stop

LIS10:05 amLisbon Humberto Delgado

Apr 25

LIS4:25 pmLisbon Humberto Delgado

27h 10m

1 stop

SEA11:35 amSeattle/Tacoma Intl

$507

Delta flights from Seattle to Lisbon

Our best Delta deals on Seattle to Lisbon flight tickets

Delta

Apr 14

SEA6:40 pmSeattle/Tacoma Intl

15h 10m

1 stop

LIS5:50 pmLisbon Humberto Delgado

Apr 27

LIS5:00 amLisbon Humberto Delgado

20h 16m

2 stops

SEA5:16 pmSeattle/Tacoma Intl

$551

Delta

Apr 21

SEA7:15 amSeattle/Tacoma Intl

20h 00m

2 stops

LIS11:15 amLisbon Humberto Delgado

Apr 28

LIS5:00 amLisbon Humberto Delgado

21h 26m

2 stops

SEA6:26 pmSeattle/Tacoma Intl

$556

Delta

Apr 16

SEA7:15 amSeattle/Tacoma Intl

19h 40m

2 stops

LIS10:55 amLisbon Humberto Delgado

Apr 27

LIS5:00 amLisbon Humberto Delgado

20h 16m

2 stops

SEA5:16 pmSeattle/Tacoma Intl

$561

Fly from

Fly to

Route

Depart

Return

Price

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 4/14

8:20 pm-11:00 pm

1 stop18h 40m

Lisbon Humberto Delgado

Wed 4/22

12:30 pm-12:44 am

2 stops20h 14m

$494

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 4/21

1:35 pm-2:30 pm

1 stop16h 55m

Lisbon Humberto Delgado

Wed 4/29

4:25 pm-11:35 am

1 stop27h 10m

$501

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 4/12

8:20 pm-11:05 pm

1 stop18h 45m

Lisbon Humberto Delgado

Wed 4/22

12:30 pm-12:44 am

2 stops20h 14m

$504

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 4/22

11:59 pm-10:45 pm

2 stops38h 46m

Lisbon Humberto Delgado

Wed 4/29

6:15 am-6:35 pm

2 stops20h 20m

$505

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 4/7

8:20 pm-11:00 pm

1 stop18h 40m

Lisbon Humberto Delgado

Wed 4/15

6:45 pm-6:25 pm

1 stop31h 40m

$506

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 4/12

8:20 pm-10:05 am

1 stop29h 45m

Lisbon Humberto Delgado

Sat 4/25

4:25 pm-11:35 am

1 stop27h 10m

$507

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 4/19

1:35 pm-11:05 pm

1 stop25h 30m

Lisbon Humberto Delgado

Tue 5/5

1:40 pm-11:35 am

1 stop29h 55m

$508

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 4/20

8:20 pm-11:10 pm

1 stop18h 50m

Lisbon Humberto Delgado

Wed 5/6

7:20 am-11:35 am

1 stop36h 15m

$510

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 4/7

8:20 pm-11:00 pm

1 stop18h 40m

Lisbon Humberto Delgado

Wed 4/15

11:05 am-9:23 pm

1 stop18h 18m

$511

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 4/12

8:20 pm-3:45 pm

1 stop35h 25m

Lisbon Humberto Delgado

Tue 4/28

6:45 pm-11:35 am

1 stop24h 50m

$512

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Layovers

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 $492. If you are unable to visit Lisbon during the month of January, then departing from Seattle during the month February is also very affordable. Most momondo users find prices during this month for around $560.

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 $822 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 $742 on momondo.

Can stopping save me money on Seattle to Lisbon flights?

You could potentially save up to 5% 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 March 2026, prices for Seattle to Lisbon flights are approximately 20% 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 10m
Direct flights	None

The fastest flight from Seattle to Lisbon takes 15h 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. 15h 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?
The number of operators available for flights from Seattle/Tacoma Intl Airport to Lisbon Humberto Delgado Airport is 13 as of March 2026.
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?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Seattle to Lisbon is British Airways (23% of total bookings). The next most popular airlines are United Airlines (16%), Delta (14%), and Lufthansa (10%).

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
Icelandair	PriceFrom $348	Free Cancellation	Rating 7.1 617 reviews	Search Icelandair flights
British Airways	PriceFrom $482	Free Cancellation	Rating 6.7 7,774 reviews	Search British Airways flights
Lufthansa	PriceFrom $484	Free Cancellation	Rating 6.8 7,818 reviews	Search Lufthansa flights
United Airlines	PriceFrom $494	Free Cancellation	Rating 7.4 9,372 reviews	Search United Airlines flights
Air France	PriceFrom $530	Free Cancellation	Rating 7.4 1,541 reviews	Search Air France flights
KLM	PriceFrom $535	Free Cancellation	Rating 7.7 1,461 reviews	Search KLM flights
Air Canada	PriceFrom $543	Free Cancellation	Rating 7.1 10,763 reviews	Search Air Canada flights
Delta	PriceFrom $554	Free Cancellation	Rating 7.9 8,238 reviews	Search Delta flights
American Airlines	PriceFrom $558	Free Cancellation	Rating 7.1 11,370 reviews	Search American Airlines flights
SWISS	PriceFrom $562	Free Cancellation	Rating 7.5 1,887 reviews	Search SWISS flights

Sintra

Ericeira

Fátima

Nazaré

Setúbal

Estoril

Peniche

Evora

Oeiras

Sesimbra

Leiria

Figueira da Foz

Tomar

Zambujeira do Mar

Batalha

Óbidos

Sines

Comporta

Torres Vedras

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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Cheap flights from Seattle to Lisbon from $254

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 4/24. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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See travel insights to Lisbon from

How to get the cheapest flight ticket from Seattle to Lisbon

What is the cheapest month to fly to Lisbon?

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

Can stopping save me money on Seattle to Lisbon flights?

How have Seattle to Lisbon flight prices changed over time?

What is the cheapest airline that flies from Seattle/Tacoma Intl to Lisbon Humberto Delgado?

What airlines fly to Lisbon?

Which airport is the most popular layover for flights between Seattle and Lisbon?

Which layover airport offers the lowest fares from Seattle to Lisbon?

Which layover airport has the shortest travel time from Seattle to Lisbon?

Which layover airport has the shortest connection time from Seattle to Lisbon?

When to book flights from Seattle to Lisbon

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

Direct flights

Best airlines flying from Seattle to Lisbon

Compare and see reviews for airlines that fly from Seattle to Lisbon with momondo

Traveling to a place near Lisbon?

Why use momondo?

An easier way to manage your Lisbon trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Portugal

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List of cabin classes available on flights landing in Lisbon. Availability may vary depending on flight origin and airline.

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