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

London (LHR) was the most common stop: 30% of momondo users choosing 1-stop flights on this route connected there.

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

Flights connecting via Washington, D.C. (IAD) have the shortest average one-way travel time: 13h 35m.

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

Munich (MUC) has the shortest average layover time for this route: 1h 10m.

What airlines fly to Lisbon?

British Airways, Delta and United Airlines 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 38% 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.

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

Flights via Munich (MUC) offer the lowest average round-trip price of $529.

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

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

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 November 2025.

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.

$262 Cheap Flights from Seattle to Lisbon in 2025/26

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5:50 am - 9:20 amSEA-LIS

19h 30m2 stops

6:10 am - 10:28 pmLIS-SEA

24h 18m2 stops

$494Multiple Airlines

Find Deal

Tue, Dec 2 - Tue, Dec 9

12:37 pm - 9:20 amSEA-LIS

36h 43m3 stops

11:20 am - 9:01 pmLIS-SEA

41h 41m3 stops

$496United Airlines

Find Deal

Sat, Feb 14 - Mon, Feb 23

1:45 pm - 8:00 amSEA-LIS

34h 15m1 stop

5:00 am - 11:50 amLIS-SEA

14h 50m1 stop

$497Delta

Find Deal

Sun, Jan 11 - Tue, Jan 20

3:00 pm - 10:50 pmSEA-LIS

24h 50m1 stop

5:05 am - 12:20 pmLIS-SEA

15h 15m1 stop

$498Lufthansa

Find Deal

Tue, Mar 24 - Tue, Mar 31

8:00 pm - 9:20 amSEA-LIS

53h 20m2 stops

11:20 am - 3:01 pmLIS-SEA

34h 41m2 stops

$499Air Canada

Find Deal

Fri, Feb 27 - Tue, Mar 10

5:11 pm - 10:15 amSEA-LIS

33h 04m2 stops

5:00 am - 12:10 pmLIS-SEA

15h 10m1 stop

$501United Airlines

Find Deal

Sat, Dec 6 - Tue, Dec 16

5:00 am - 8:55 amSEA-LIS

19h 55m2 stops

11:20 am - 10:16 pmLIS-SEA

42h 56m2 stops

$502Multiple Airlines

Find Deal

Sat, Feb 21 - Sat, Feb 28

8:00 pm - 9:20 amSEA-LIS

29h 20m2 stops

10:50 am - 10:16 pmLIS-SEA

18h 26m1 stop

$504Air Canada

Find Deal

Sun, Feb 22 - Sun, Mar 8

8:10 am - 9:20 amSEA-LIS

17h 10m1 stop

11:20 am - 10:16 pmLIS-SEA

41h 56m2 stops

$505Air Canada

Find Deal

Fri, Feb 27 - Thu, Mar 12

8:10 am - 10:15 amSEA-LIS

18h 05m1 stop

5:00 am - 12:10 pmLIS-SEA

15h 10m1 stop

$506United Airlines

Find Deal

Sat, Dec 6 - Tue, Dec 16

Scandinavian Airlines flights from Seattle to Lisbon

Our best Scandinavian Airlines deals on Seattle to Lisbon flight tickets

Scandinavian Airlines

Feb 15

SEA7:10 amSeattle/Tacoma Intl

25h 20m

2 stops

LIS4:30 pmLisbon Humberto Delgado

Feb 20

LIS6:55 amLisbon Humberto Delgado

23h 30m

2 stops

SEA10:25 pmSeattle/Tacoma Intl

$514

Find similar

Scandinavian Airlines

Feb 28

SEA11:31 amSeattle/Tacoma Intl

20h 34m

2 stops

LIS4:05 pmLisbon Humberto Delgado

Mar 6

LIS4:55 pmLisbon Humberto Delgado

37h 30m

2 stops

SEA10:25 pmSeattle/Tacoma Intl

$525

Find similar

Scandinavian Airlines

Feb 28

SEA7:10 amSeattle/Tacoma Intl

30h 20m

2 stops

LIS9:30 pmLisbon Humberto Delgado

Mar 7

LIS7:05 amLisbon Humberto Delgado

23h 20m

2 stops

SEA10:25 pmSeattle/Tacoma Intl

$555

Find similar

British Airways flights from Seattle to Lisbon

Our best British Airways deals on Seattle to Lisbon flight tickets

British Airways

Jan 5

SEA6:50 pmSeattle/Tacoma Intl

19h 05m

1 stop

LIS9:55 pmLisbon Humberto Delgado

Jan 12

LIS6:35 pmLisbon Humberto Delgado

24h 55m

1 stop

SEA11:30 amSeattle/Tacoma Intl

$575

Find similar

British Airways

Nov 15

SEA1:35 pmSeattle/Tacoma Intl

36h 15m

1 stop

LIS9:50 amLisbon Humberto Delgado

Nov 27

LIS7:00 amLisbon Humberto Delgado

17h 55m

1 stop

SEA4:55 pmSeattle/Tacoma Intl

$683

Find similar

British Airways

Nov 15

SEA1:35 pmSeattle/Tacoma Intl

17h 15m

1 stop

LIS2:50 pmLisbon Humberto Delgado

Nov 23

LIS7:05 amLisbon Humberto Delgado

17h 50m

1 stop

SEA4:55 pmSeattle/Tacoma Intl

$693

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 12/2

5:50 am-9:20 am

2 stops19h 30m

Lisbon Humberto Delgado

Tue 12/9

6:10 am-10:28 pm

2 stops24h 18m

$494

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 2/14

12:37 pm-9:20 am

3 stops36h 43m

Lisbon Humberto Delgado

Mon 2/23

11:20 am-9:01 pm

3 stops41h 41m

$496

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 1/11

1:45 pm-8:00 am

1 stop34h 15m

Lisbon Humberto Delgado

Tue 1/20

5:00 am-11:50 am

1 stop14h 50m

$497

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 3/24

3:00 pm-10:50 pm

1 stop24h 50m

Lisbon Humberto Delgado

Tue 3/31

5:05 am-12:20 pm

1 stop15h 15m

$498

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 2/27

8:00 pm-9:20 am

2 stops53h 20m

Lisbon Humberto Delgado

Tue 3/10

11:20 am-3:01 pm

2 stops34h 41m

$499

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 12/6

5:11 pm-10:15 am

2 stops33h 04m

Lisbon Humberto Delgado

Tue 12/16

5:00 am-12:10 pm

1 stop15h 10m

$501

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 2/21

5:00 am-8:55 am

2 stops19h 55m

Lisbon Humberto Delgado

Sat 2/28

11:20 am-10:16 pm

2 stops42h 56m

$502

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 2/22

8:00 pm-9:20 am

2 stops29h 20m

Lisbon Humberto Delgado

Sun 3/8

10:50 am-10:16 pm

1 stop18h 26m

$504

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 2/27

8:10 am-9:20 am

1 stop17h 10m

Lisbon Humberto Delgado

Thu 3/12

11:20 am-10:16 pm

2 stops41h 56m

$505

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 12/6

8:10 am-10:15 am

1 stop18h 05m

Lisbon Humberto Delgado

Tue 12/16

5:00 am-12:10 pm

1 stop15h 10m

$506

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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, November 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 $635. If you are unable to visit Lisbon during the month of November, then departing from Seattle during the month January is also very affordable. Most momondo users find prices during this month for around $707.

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 $905 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 $776 on momondo.

Can stopping save me money on Seattle to Lisbon flights?

You could potentially save up to 14% 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 November 2025, 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

Direct flights	None

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 05m 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 November 2025.
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 Delta (16%), United Airlines (14%), and Air France (9%).

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 $358	Free Cancellation	Rating 7.1 578 reviews	Search Icelandair flights
Lufthansa	PriceFrom $517	Free Cancellation	Rating 6.8 7,572 reviews	Search Lufthansa flights
British Airways	PriceFrom $534	Free Cancellation	Rating 6.7 7,520 reviews	Search British Airways flights
Air Canada	PriceFrom $543	Free Cancellation	Rating 7.1 10,448 reviews	Search Air Canada flights
United Airlines	PriceFrom $543	Free Cancellation	Rating 7.4 9,017 reviews	Search United Airlines flights
Air France	PriceFrom $560	Free Cancellation	Rating 7.4 1,487 reviews	Search Air France flights
SWISS	PriceFrom $562	Free Cancellation	Rating 7.5 1,784 reviews	Search SWISS flights
KLM	PriceFrom $566	Free Cancellation	Rating 7.7 1,411 reviews	Search KLM flights
American Airlines	PriceFrom $621	Free Cancellation	Rating 7.2 11,051 reviews	Search American Airlines flights
Aer Lingus	PriceFrom $627	Free Cancellation	Rating 7.2 1,370 reviews	Search Aer Lingus flights

Sintra

Fátima

Ericeira

Nazaré

Oeiras

Setúbal

Peniche

Estoril

Leiria

Sesimbra

Tomar

Almada

Evora

Zambujeira do Mar

Figueira da Foz

Batalha

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.

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.

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Cheap flights from Seattle to Lisbon from $262

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 12/3. 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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Scandinavian Airlines flights from Seattle to Lisbon

Our best Scandinavian Airlines deals on Seattle to Lisbon flight tickets

British Airways flights from Seattle to Lisbon

Our best British Airways deals on Seattle to Lisbon flight tickets

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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?

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?

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

Can stopping save me money on Seattle to Lisbon flights?

You could potentially save up to 14% 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 November 2025, prices for Seattle to Lisbon flights are approximately 20% cheaper when compared to flights at the same time last year.

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

Icelandair, British Airways, and Scandinavian Airlines are the most popular carriers operating 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?

London (LHR) was the most common stop: 30% of momondo users choosing 1-stop flights on this route connected there.

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

Flights via Munich (MUC) offer the lowest average round-trip price of $529.

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

Flights connecting via Washington, D.C. (IAD) have the shortest average one-way travel time: 13h 35m.

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

Munich (MUC) has the shortest average layover time for this route: 1h 10m.

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

Direct flights

How far is Seattle/Tacoma Intl to Lisbon Humberto Delgado by plane?

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Lisbon Humberto Delgado Airport?

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?

What documentation or ID do you need to fly to Lisbon Humberto Delgado Airport?

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

Traveling to a place near Lisbon?

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Lisbon?

Can I find flights from Seattle to Lisbon with flexible booking policies on momondo?

How can momondo help me find flights from Seattle to Lisbon?

I’m not ready to book a flight from Seattle to Lisbon right now. Can momondo alert me if prices change?

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

Airports servicing Portugal