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

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

Flights connecting via Paris (CDG) have the shortest average one-way travel time: 14h 26m.

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 12 different airlines that fly to Lisbon on a routine basis, so you have a few additional options to choose from.

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

London (LHR) was the most common stop: 42% 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 22m.

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.

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 12 as of September 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.

$280 Cheap Flights from Seattle to Lisbon in 2026/27

Discover deals from 900+ travel sites with momondo.

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.

8:20 pm - 11:10 pmSEA Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado

18h 50m1 stop London Heathrow

6:35 pm - 12:25 pmLIS Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl

24h 50m1 stop London Heathrow

$658British Airways

Mon, Oct 19 - Mon, Oct 26

6:45 pm - 5:45 pmSEA Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado

15h 00m1 stop London Heathrow

11:05 am - 10:31 pmLIS Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl

19h 26m1 stop Philadelphia

$658British Airways

Wed, Nov 18 - Sun, Nov 22

6:45 pm - 9:45 pmSEA Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado

19h 00m1 stop London Heathrow

6:45 pm - 9:29 amLIS Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl

22h 44m2 stops Madrid Barajas Dallas/Fort Worth

$658Multiple Airlines

Sun, Jan 17 - Sat, Jan 23

6:45 pm - 5:45 pmSEA Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado

15h 00m1 stop London Heathrow

6:45 pm - 9:42 amLIS Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl

22h 57m2 stops Madrid Barajas Dallas/Fort Worth

$658Multiple Airlines

Sun, Feb 21 - Sat, Feb 27

8:40 am - 9:20 amSEA Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado

16h 40m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl

11:20 am - 2:37 pmLIS Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl

35h 17m2 stops Toronto Pearson Intl Vancouver Intl

$662Air Canada

Fri, Nov 13 - Wed, Nov 25

7:35 pm - 9:20 amSEA Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado

29h 45m2 stops San Francisco Toronto Pearson Intl

11:20 am - 8:59 pmLIS Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl

17h 39m1 stop Toronto Pearson Intl

$663United Airlines

Mon, Nov 16 - Tue, Dec 1

7:35 pm - 9:20 amSEA Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado

29h 45m2 stops San Francisco Toronto Pearson Intl

11:20 am - 8:59 pmLIS Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl

17h 39m1 stop Toronto Pearson Intl

$664United Airlines

Mon, Nov 23 - Wed, Dec 2

7:45 am - 8:55 amSEA Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado

17h 10m1 stop Toronto Pearson Intl

11:20 am - 8:59 pmLIS Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl

17h 39m1 stop Toronto Pearson Intl

$664Air Canada

Wed, Nov 18 - Tue, Dec 1

11:07 pm - 8:55 amSEA Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado

25h 48m1 stop Boston Logan Intl

11:15 am - 10:55 pmLIS Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl

19h 40m1 stop Boston Logan Intl

$669Delta

Sat, Nov 21 - Thu, Dec 3

11:07 pm - 8:55 amSEA Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado

25h 48m1 stop Boston Logan Intl

10:55 am - 10:55 pmLIS Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl

20h 00m1 stop Boston Logan Intl

$669Delta

Sat, Nov 21 - Fri, Dec 4

Cheap last minute flights

Enter your travel dates to find the best prices.

6:45 pm - 8:50 amSEA Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado

30h 05m1 stop Paris Charles de Gaulle

11:55 am - 11:52 amLIS Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl

31h 57m1 stop Amsterdam Schiphol

$727Delta

Sun, Sep 27 - Wed, Oct 14

6:45 pm - 2:55 pmSEA Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado

36h 10m1 stop Paris Charles de Gaulle

11:55 am - 11:52 amLIS Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl

31h 57m1 stop Amsterdam Schiphol

$727Delta

Sun, Sep 27 - Mon, Oct 19

8:20 pm - 3:35 pmSEA Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado

35h 15m1 stop London Heathrow

6:55 pm - 11:35 amLIS Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl

24h 40m1 stop London Heathrow

$772British Airways

Mon, Sep 28 - Sat, Oct 17

6:45 pm - 10:25 pmSEA Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado

19h 40m1 stop Paris Charles de Gaulle

7:45 pm - 11:52 amLIS Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl

24h 07m1 stop Amsterdam Schiphol

$785Multiple Airlines

Fri, Sep 25 - Mon, Oct 5

1:30 pm - 11:05 pmSEA Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado

25h 35m1 stop London Heathrow

6:55 pm - 11:35 amLIS Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl

24h 40m1 stop London Heathrow

$890British Airways

Sun, Sep 27 - Sat, Oct 17

6:45 pm - 10:25 pmSEA Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado

19h 40m1 stop Paris Charles de Gaulle

7:45 pm - 11:52 amLIS Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl

24h 07m1 stop Amsterdam Schiphol

$900Multiple Airlines

Sun, Sep 27 - Sat, Oct 3

6:50 pm - 10:45 pmSEA Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado

19h 55m1 stop Munich Franz Josef Strauss

2:30 pm - 4:59 pmLIS Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl

34h 29m1 stop Munich Franz Josef Strauss

$923Lufthansa

Fri, Sep 25 - Mon, Oct 5

7:00 pm - 1:50 pmSEA Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado

34h 50m1 stop Reykjavik Keflavik Intl

7:00 am - 8:40 pmLIS Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl

21h 40m2 stops London Gatwick Reykjavik Keflavik Intl

$996Icelandair

Sun, Sep 27 - Tue, Oct 20

2:10 pm - 3:35 pmSEA Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado

17h 25m1 stop Frankfurt am Main

2:30 pm - 4:59 pmLIS Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl

34h 29m1 stop Munich Franz Josef Strauss

$1,013Lufthansa

Wed, Sep 23 - Mon, Sep 28

7:00 pm - 1:50 pmSEA Seattle/Tacoma Intl-LIS Lisbon Humberto Delgado

34h 50m1 stop Reykjavik Keflavik Intl

7:00 am - 5:55 pmLIS Lisbon Humberto Delgado-SEA Seattle/Tacoma Intl

42h 55m2 stops London Gatwick Reykjavik Keflavik Intl

$1,398Icelandair

Sun, Sep 27 - Mon, Oct 19

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Lufthansa flights from Seattle to Lisbon

Our best Lufthansa deals on Seattle to Lisbon flight tickets

Lufthansa

Oct 30

SEA3:50 pmSeattle/Tacoma Intl

24h 45m

1 stop

LIS11:35 pmLisbon Humberto Delgado

Nov 10

LIS2:20 pmLisbon Humberto Delgado

30h 40m

1 stop

SEA1:00 pmSeattle/Tacoma Intl

$695

Lufthansa

Sep 25

SEA6:50 pmSeattle/Tacoma Intl

19h 55m

1 stop

LIS10:45 pmLisbon Humberto Delgado

Oct 5

LIS2:30 pmLisbon Humberto Delgado

34h 29m

1 stop

SEA4:59 pmSeattle/Tacoma Intl

$923

Air Canada flights from Seattle to Lisbon

Our best Air Canada deals on Seattle to Lisbon flight tickets

Air Canada

Nov 13

SEA8:40 amSeattle/Tacoma Intl

16h 40m

2 stops

LIS9:20 amLisbon Humberto Delgado

Nov 25

LIS11:20 amLisbon Humberto Delgado

35h 17m

2 stops

SEA2:37 pmSeattle/Tacoma Intl

$662

Air Canada

Oct 21

SEA7:55 amSeattle/Tacoma Intl

17h 25m

2 stops

LIS9:20 amLisbon Humberto Delgado

Nov 10

LIS6:05 amLisbon Humberto Delgado

20h 17m

2 stops

SEA6:22 pmSeattle/Tacoma Intl

$693

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Mon 10/19

8:20 pm-11:10 pm

1 stop18h 50m

Lisbon Humberto Delgado

Mon 10/26

6:35 pm-12:25 pm

1 stop24h 50m

$658

Quickest round-trip

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Wed 11/18

6:45 pm-5:45 pm

1 stop15h 00m

Lisbon Humberto Delgado

Sun 11/22

11:05 am-10:31 pm

1 stop19h 26m

$658

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Sun 1/17

6:45 pm-9:45 pm

1 stop19h 00m

Lisbon Humberto Delgado

Sat 1/23

6:45 pm-9:29 am

2 stops22h 44m

$658

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Sun 2/21

6:45 pm-5:45 pm

1 stop15h 00m

Lisbon Humberto Delgado

Sat 2/27

6:45 pm-9:42 am

2 stops22h 57m

$658

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Fri 11/13

8:40 am-9:20 am

2 stops16h 40m

Lisbon Humberto Delgado

Wed 11/25

11:20 am-2:37 pm

2 stops35h 17m

$662

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Mon 11/16

7:35 pm-9:20 am

2 stops29h 45m

Lisbon Humberto Delgado

Tue 12/1

11:20 am-8:59 pm

1 stop17h 39m

$663

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Mon 11/23

7:35 pm-9:20 am

2 stops29h 45m

Lisbon Humberto Delgado

Wed 12/2

11:20 am-8:59 pm

1 stop17h 39m

$664

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Wed 11/18

7:45 am-8:55 am

1 stop17h 10m

Lisbon Humberto Delgado

Tue 12/1

11:20 am-8:59 pm

1 stop17h 39m

$664

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Sat 11/21

11:07 pm-8:55 am

1 stop25h 48m

Lisbon Humberto Delgado

Thu 12/3

11:15 am-10:55 pm

1 stop19h 40m

$669

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Sat 11/21

11:07 pm-8:55 am

1 stop25h 48m

Lisbon Humberto Delgado

Fri 12/4

10:55 am-10:55 pm

1 stop20h 00m

$669

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?

Prices are currently low for flights on this route.

Typical prices usually range from $782 to $1,068.
The lowest price recently found on this route was $658.

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 $459. 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 $553.

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 $855 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 $787 on momondo.

How have Seattle to Lisbon flight prices changed over time?

As of September 2026, prices for Seattle to Lisbon flights are approximately 29% 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	$280
Fastest flight time	14h 15m
Direct flights	None

The best one-way flight to Lisbon from Seattle in the past 72 hours is $280. The best round-trip flight deal from Seattle to Lisbon found on momondo in the last 72 hours is $658.

The fastest flight from Seattle to Lisbon takes 14h 15m

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. 14h 15m 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 12 as of September 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 (27% of total bookings). The next most popular airlines are Delta (24%), United Airlines (13%), 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 $345	Free Cancellation	Rating 6.9 747 reviews	Search Icelandair flights
Lufthansa	PriceFrom $471	Free Cancellation	Rating 6.8 8,236 reviews	Search Lufthansa flights
British Airways	PriceFrom $482	Free Cancellation	Rating 6.7 8,229 reviews	Search British Airways flights
United Airlines	PriceFrom $482	Free Cancellation	Rating 7.4 10,229 reviews	Search United Airlines flights
American Airlines	PriceFrom $497	Free Cancellation	Rating 7.0 12,081 reviews	Search American Airlines flights
KLM	PriceFrom $503	Free Cancellation	Rating 7.8 1,575 reviews	Search KLM flights
Air France	PriceFrom $504	Free Cancellation	Rating 7.5 1,651 reviews	Search Air France flights
Delta	PriceFrom $550	Free Cancellation	Rating 7.8 8,595 reviews	Search Delta flights
Scandinavian Airlines	PriceFrom $567	Free Cancellation	Rating 7.4 1,989 reviews	Search Scandinavian Airlines flights
Turkish Airlines	PriceFrom $687	Free Cancellation	Rating 7.4 4,462 reviews	Search Turkish Airlines flights

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Caldas da Rainha

Ericeira

Leiria

Oeiras

Costa da Caparica

Comporta

Tomar

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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 $280

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 10/25. 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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Lufthansa flights from Seattle to Lisbon

Our best Lufthansa deals on Seattle to Lisbon flight tickets

Air Canada flights from Seattle to Lisbon

Our best Air Canada deals on Seattle to Lisbon flight tickets

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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

Best Price Found

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

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.

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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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