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

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

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 36% of people opting to fly with this airline when traveling to Lisbon. Keep in mind that there are 14 different airlines that fly to Lisbon on a routine basis, so you have a few additional options to choose from.

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.

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

Flights via Washington, D.C. (IAD) offer the lowest average round-trip price of $511.

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.

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 14 as of June 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.

$304 Cheap Flights from Seattle to Lisbon in 2026

Q: What is the typical price of a round-trip flight between Seattle and Lisbon?

Prices are currently low for flights on this route. Typical prices usually range from $1,376 to $1,126. The lowest price recently found on this route was $860.

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Find the cheapest flights from Seattle to Lisbon

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:50 pm - 10:45 pm

SEA

LIS

19h 55m

1 stop

6:15 am - 9:40 am

LIS

SEA

35h 25m

3 stops

$860Multiple Airlines

Tue, Jul 7 - Tue, Jul 14

3:40 pm - 10:40 pm

SEA

LIS

23h 00m

2 stops

6:10 am - 6:32 pm

LIS

SEA

44h 22m

3 stops

$861Multiple Airlines

Sat, Aug 15 - Sun, Aug 23

6:50 pm - 10:45 pm

SEA

LIS

19h 55m

1 stop

3:50 pm - 6:59 pm

LIS

SEA

35h 09m

2 stops

$862Lufthansa

Wed, Oct 21 - Mon, Dec 7

8:00 am - 7:25 pm

SEA

LIS

27h 25m

3 stops

2:00 pm - 4:59 pm

LIS

SEA

34h 59m

3 stops

$863Multiple Airlines

Sun, Aug 16 - Sat, Aug 22

6:50 pm - 10:45 pm

SEA

LIS

19h 55m

1 stop

6:15 am - 9:40 am

LIS

SEA

35h 25m

2 stops

$864Multiple Airlines

Tue, Jul 7 - Tue, Jul 14

7:45 am - 11:00 am

SEA

LIS

19h 15m

1 stop

5:00 am - 2:37 pm

LIS

SEA

17h 37m

2 stops

$865Multiple Airlines

Mon, Nov 16 - Tue, Dec 1

10:30 am - 8:55 pm

SEA

LIS

26h 25m

3 stops

6:10 am - 9:40 am

LIS

SEA

35h 30m

3 stops

$866WestJet

Sat, Jun 13 - Sun, Jun 21

7:10 pm - 6:55 pm

SEA

LIS

15h 45m

1 stop

6:10 am - 9:40 am

LIS

SEA

35h 30m

2 stops

$867Multiple Airlines

Mon, Jul 6 - Sun, Jul 19

8:20 pm - 11:00 pm

SEA

LIS

18h 40m

1 stop

11:05 am - 10:51 pm

LIS

SEA

18h 46m

1 stop

$868British Airways

Tue, Oct 13 - Wed, Oct 28

3:55 pm - 9:00 am

SEA

LIS

33h 05m

1 stop

10:55 pm - 1:45 pm

LIS

SEA

22h 50m

1 stop

$869Scandinavian Airlines

Fri, Oct 2 - Sat, Oct 10

Scandinavian Airlines flights from Seattle to Lisbon

Our best Scandinavian Airlines deals on Seattle to Lisbon flight tickets

Scandinavian Airlines

Oct 2

SEA3:55 pmSeattle/Tacoma Intl

33h 05m

1 stop

LIS9:00 amLisbon Humberto Delgado

Oct 10

LIS10:55 pmLisbon Humberto Delgado

22h 50m

1 stop

SEA1:45 pmSeattle/Tacoma Intl

$869

Scandinavian Airlines

Oct 2

SEA2:30 pmSeattle/Tacoma Intl

23h 35m

2 stops

LIS10:05 pmLisbon Humberto Delgado

Oct 10

LIS10:55 pmLisbon Humberto Delgado

22h 50m

1 stop

SEA1:45 pmSeattle/Tacoma Intl

$897

Scandinavian Airlines

Aug 16

SEA3:55 pmSeattle/Tacoma Intl

19h 30m

1 stop

LIS7:25 pmLisbon Humberto Delgado

Aug 26

LIS7:15 amLisbon Humberto Delgado

22h 30m

2 stops

SEA9:45 pmSeattle/Tacoma Intl

$898

Lufthansa flights from Seattle to Lisbon

Our best Lufthansa deals on Seattle to Lisbon flight tickets

Lufthansa

Oct 21

SEA6:50 pmSeattle/Tacoma Intl

19h 55m

1 stop

LIS10:45 pmLisbon Humberto Delgado

Dec 7

LIS3:50 pmLisbon Humberto Delgado

35h 09m

2 stops

SEA6:59 pmSeattle/Tacoma Intl

$862

Lufthansa

Oct 25

SEA6:50 amSeattle/Tacoma Intl

18h 20m

1 stop

LIS8:10 amLisbon Humberto Delgado

Dec 6

LIS5:00 amLisbon Humberto Delgado

15h 00m

1 stop

SEA12:00 pmSeattle/Tacoma Intl

$873

Lufthansa

Nov 1

SEA8:00 amSeattle/Tacoma Intl

18h 15m

1 stop

LIS10:15 amLisbon Humberto Delgado

Nov 15

LIS5:00 amLisbon Humberto Delgado

15h 00m

1 stop

SEA12:00 pmSeattle/Tacoma Intl

$876

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 7/7

6:50 pm-10:45 pm

1 stop19h 55m

Lisbon Humberto Delgado

Tue 7/14

6:15 am-9:40 am

3 stops35h 25m

$860

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 8/15

3:40 pm-10:40 pm

2 stops23h 00m

Lisbon Humberto Delgado

Sun 8/23

6:10 am-6:32 pm

3 stops44h 22m

$861

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 10/21

6:50 pm-10:45 pm

1 stop19h 55m

Lisbon Humberto Delgado

Mon 12/7

3:50 pm-6:59 pm

2 stops35h 09m

$862

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 8/16

8:00 am-7:25 pm

3 stops27h 25m

Lisbon Humberto Delgado

Sat 8/22

2:00 pm-4:59 pm

3 stops34h 59m

$863

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 7/7

6:50 pm-10:45 pm

1 stop19h 55m

Lisbon Humberto Delgado

Tue 7/14

6:15 am-9:40 am

2 stops35h 25m

$864

Quickest round-trip

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 11/16

7:45 am-11:00 am

1 stop19h 15m

Lisbon Humberto Delgado

Tue 12/1

5:00 am-2:37 pm

2 stops17h 37m

$865

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 6/13

10:30 am-8:55 pm

3 stops26h 25m

Lisbon Humberto Delgado

Sun 6/21

6:10 am-9:40 am

3 stops35h 30m

$866

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 7/6

7:10 pm-6:55 pm

1 stop15h 45m

Lisbon Humberto Delgado

Sun 7/19

6:10 am-9:40 am

2 stops35h 30m

$867

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 10/13

8:20 pm-11:00 pm

1 stop18h 40m

Lisbon Humberto Delgado

Wed 10/28

11:05 am-10:51 pm

1 stop18h 46m

$868

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 10/2

3:55 pm-9:00 am

1 stop33h 05m

Lisbon Humberto Delgado

Sat 10/10

10:55 pm-1:45 pm

1 stop22h 50m

$869

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 typical price of a round-trip flight between Seattle and Lisbon?

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 $555.

How far in advance should I book a flight from Seattle 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 $818 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 $721 on momondo.

How have Seattle to Lisbon flight prices changed over time?

As of June 2026, prices for Seattle to Lisbon flights are approximately 17% more expensive 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	13h 45m
Direct flights	None

The fastest flight from Seattle to Lisbon takes 13h 45m

There are no direct flights from Seattle to Lisbon. There are no popular flight routes from Seattle to Lisbon.

Search flight deals

Frequently asked questions about flying 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 45m 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 14 as of June 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 (24% of total bookings). The next most popular airlines are Delta (17%), United Airlines (15%), 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 7.0 663 reviews	Search Icelandair flights
Lufthansa	PriceFrom $482	Free Cancellation	Rating 6.8 8,035 reviews	Search Lufthansa flights
British Airways	PriceFrom $482	Free Cancellation	Rating 6.7 8,019 reviews	Search British Airways flights
United Airlines	PriceFrom $494	Free Cancellation	Rating 7.4 9,778 reviews	Search United Airlines flights
KLM	PriceFrom $503	Free Cancellation	Rating 7.8 1,524 reviews	Search KLM flights
Air France	PriceFrom $505	Free Cancellation	Rating 7.4 1,596 reviews	Search Air France flights
Air Canada	PriceFrom $543	Free Cancellation	Rating 7.1 11,114 reviews	Search Air Canada flights
Delta	PriceFrom $545	Free Cancellation	Rating 7.9 8,398 reviews	Search Delta flights
Aer Lingus	PriceFrom $553	Free Cancellation	Rating 7.3 1,590 reviews	Search Aer Lingus flights
American Airlines	PriceFrom $558	Free Cancellation	Rating 7.1 11,641 reviews	Search American Airlines flights

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Fátima

Ericeira

Nazaré

Setúbal

Estoril

Peniche

Evora

Oeiras

Leiria

Figueira da Foz

Sesimbra

Zambujeira do Mar

Batalha

Óbidos

Tomar

Comporta

Sines

Torres Vedras

Costa da Caparica

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 $304

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 11/17. 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 typical price of a round-trip flight between Seattle and Lisbon?

What is the cheapest month to fly to Lisbon?

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

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

Frequently asked questions about flying 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

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Why use momondo?

An easier way to manage your Lisbon trip

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