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

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

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 connection time from Seattle to Lisbon?

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

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

London (LHR) was the most common stop: 40% of momondo users choosing 1-stop flights on this route connected there.

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 February 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.

$264 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 $503 to $707. The lowest price recently found on this route was $486.

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

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.

8:00 am - 10:30 am

SEA

LIS

18h 30m

1 stop

5:05 am - 12:20 pm

LIS

SEA

15h 15m

1 stop

$486United Airlines

lun., abr. 20 - mar., abr. 28

6:40 pm - 5:50 pm

SEA

LIS

15h 10m

1 stop

5:00 am - 11:45 am

LIS

SEA

14h 45m

1 stop

$487Delta

lun., abr. 13 - mar., abr. 21

3:40 pm - 11:05 am

SEA

LIS

35h 25m

2 stops

6:15 am - 10:37 pm

LIS

SEA

24h 22m

2 stops

$488Lufthansa

lun., abr. 13 - mié., abr. 22

10:35 pm - 9:20 am

SEA

LIS

26h 45m

2 stops

5:05 am - 12:20 pm

LIS

SEA

15h 15m

1 stop

$489United Airlines

dom., abr. 12 - lun., abr. 20

11:59 pm - 10:30 am

SEA

LIS

26h 31m

2 stops

5:05 am - 12:20 pm

LIS

SEA

15h 15m

1 stop

$490United Airlines

sáb., abr. 18 - lun., abr. 27

10:35 pm - 9:20 am

SEA

LIS

26h 45m

2 stops

6:15 am - 4:59 pm

LIS

SEA

18h 44m

1 stop

$491United Airlines

dom., abr. 12 - mié., abr. 22

11:45 am - 3:10 pm

SEA

LIS

20h 25m

2 stops

5:00 am - 12:35 pm

LIS

SEA

14h 35m

1 stop

$492Delta

mar., mar. 10 - mié., mar. 18

1:35 pm - 11:00 pm

SEA

LIS

25h 25m

1 stop

6:35 am - 10:38 pm

LIS

SEA

24h 03m

2 stops

$494Multiple Airlines

mar., abr. 21 - sáb., may. 2

9:00 am - 8:10 am

SEA

LIS

15h 10m

2 stops

5:00 am - 12:10 pm

LIS

SEA

15h 10m

1 stop

$495United Airlines

mar., feb. 24 - jue., mar. 5

9:00 am - 8:10 am

SEA

LIS

15h 10m

2 stops

6:10 am - 1:20 pm

LIS

SEA

15h 10m

1 stop

$496United Airlines

mar., feb. 24 - mié., mar. 4

Air Canada flights from Seattle to Lisbon

Our best Air Canada deals on Seattle to Lisbon flight tickets

Air Canada

Apr 24

SEA8:00 pmSeattle/Tacoma Intl

55h 00m

2 stops

LIS11:00 amLisbon Humberto Delgado

May 4

LIS11:25 amLisbon Humberto Delgado

34h 55m

2 stops

SEA2:20 pmSeattle/Tacoma Intl

$505

Air Canada

Feb 23

SEA5:45 amSeattle/Tacoma Intl

19h 35m

2 stops

LIS9:20 amLisbon Humberto Delgado

Mar 3

LIS5:00 amLisbon Humberto Delgado

25h 16m

2 stops

SEA10:16 pmSeattle/Tacoma Intl

$507

Air Canada

Apr 24

SEA8:00 pmSeattle/Tacoma Intl

55h 00m

2 stops

LIS11:00 amLisbon Humberto Delgado

May 4

LIS1:00 pmLisbon Humberto Delgado

29h 20m

1 stop

SEA10:20 amSeattle/Tacoma Intl

$510

British Airways flights from Seattle to Lisbon

Our best British Airways deals on Seattle to Lisbon flight tickets

British Airways

Apr 25

SEA2:10 pmSeattle/Tacoma Intl

25h 00m

2 stops

LIS11:10 pmLisbon Humberto Delgado

May 2

LIS6:55 pmLisbon Humberto Delgado

37h 35m

2 stops

SEA12:30 amSeattle/Tacoma Intl

$509

British Airways

Apr 22

SEA1:35 pmSeattle/Tacoma Intl

16h 35m

1 stop

LIS2:10 pmLisbon Humberto Delgado

Apr 30

LIS6:45 pmLisbon Humberto Delgado

35h 53m

2 stops

SEA10:38 pmSeattle/Tacoma Intl

$511

British Airways

Apr 16

SEA1:35 pmSeattle/Tacoma Intl

25h 30m

1 stop

LIS11:05 pmLisbon Humberto Delgado

Apr 26

LIS5:10 pmLisbon Humberto Delgado

26h 25m

1 stop

SEA11:35 amSeattle/Tacoma Intl

$535

Fly from

Fly to

Route

Depart

Return

Price

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

lun. 4/20

8:00 am-10:30 am

1 stop18h 30m

Lisbon Humberto Delgado

mar. 4/28

5:05 am-12:20 pm

1 stop15h 15m

$486

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

lun. 4/13

6:40 pm-5:50 pm

1 stop15h 10m

Lisbon Humberto Delgado

mar. 4/21

5:00 am-11:45 am

1 stop14h 45m

$487

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

lun. 4/13

3:40 pm-11:05 am

2 stops35h 25m

Lisbon Humberto Delgado

mié. 4/22

6:15 am-10:37 pm

2 stops24h 22m

$488

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

dom. 4/12

10:35 pm-9:20 am

2 stops26h 45m

Lisbon Humberto Delgado

lun. 4/20

5:05 am-12:20 pm

1 stop15h 15m

$489

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

sáb. 4/18

11:59 pm-10:30 am

2 stops26h 31m

Lisbon Humberto Delgado

lun. 4/27

5:05 am-12:20 pm

1 stop15h 15m

$490

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

dom. 4/12

10:35 pm-9:20 am

2 stops26h 45m

Lisbon Humberto Delgado

mié. 4/22

6:15 am-4:59 pm

1 stop18h 44m

$491

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

mar. 3/10

11:45 am-3:10 pm

2 stops20h 25m

Lisbon Humberto Delgado

mié. 3/18

5:00 am-12:35 pm

1 stop14h 35m

$492

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

mar. 4/21

1:35 pm-11:00 pm

1 stop25h 25m

Lisbon Humberto Delgado

sáb. 5/2

6:35 am-10:38 pm

2 stops24h 03m

$494

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

mar. 2/24

9:00 am-8:10 am

2 stops15h 10m

Lisbon Humberto Delgado

jue. 3/5

5:00 am-12:10 pm

1 stop15h 10m

$495

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

mar. 2/24

9:00 am-8:10 am

2 stops15h 10m

Lisbon Humberto Delgado

mié. 3/4

6:10 am-1:20 pm

1 stop15h 10m

$496

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 $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 $823 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 $744 on momondo.

Can stopping save me money on Seattle to Lisbon flights?

You could potentially save up to 33% 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 February 2026, prices for Seattle to Lisbon flights are approximately 14% 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	14h 10m
Direct flights	None

The fastest flight from Seattle to Lisbon takes 14h 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. 14h 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 February 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 United Airlines (16%), Delta (13%), and Lufthansa (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 $355	Free Cancellation	Rating 7.1 611 reviews	Search Icelandair flights
British Airways	PriceFrom $482	Free Cancellation	Rating 6.7 7,731 reviews	Search British Airways flights
Lufthansa	PriceFrom $484	Free Cancellation	Rating 6.8 7,780 reviews	Search Lufthansa flights
United Airlines	PriceFrom $494	Free Cancellation	Rating 7.4 9,279 reviews	Search United Airlines flights
KLM	PriceFrom $535	Free Cancellation	Rating 7.7 1,451 reviews	Search KLM flights
Air Canada	PriceFrom $543	Free Cancellation	Rating 7.1 10,709 reviews	Search Air Canada flights
Air France	PriceFrom $546	Free Cancellation	Rating 7.4 1,531 reviews	Search Air France flights
Delta	PriceFrom $554	Free Cancellation	Rating 7.9 8,178 reviews	Search Delta flights
American Airlines	PriceFrom $558	Free Cancellation	Rating 7.2 11,271 reviews	Search American Airlines flights
SWISS	PriceFrom $562	Free Cancellation	Rating 7.6 1,870 reviews	Search SWISS flights

Sintra

Ericeira

Nazaré

Fátima

Setúbal

Estoril

Peniche

Evora

Oeiras

Leiria

Sesimbra

Tomar

Figueira da Foz

Zambujeira do Mar

Batalha

Óbidos

Comporta

Torres Vedras

Sines

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.

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.

Start using Trips

Find my bookings

Get notified when prices go down

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

1 adult

vie. 3/13

vie. 3/20

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Portugal

Nearby airports

Airlines

Cabin classes

Other Portugal destinations

Other flights from Seattle

Complete your trip

Feeling lucky

Airports servicing Portugal

Cheap flights from Seattle to Lisbon from $264

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 3/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Seattle to Lisbon

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Air Canada flights from Seattle to Lisbon

Our best Air Canada 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

momondo Fare Finder

Use the filters below to find and compare flights from Seattle to Lisbon that are best for you.

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 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?

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

Fly your favorite airline to Lisbon

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Lisbon

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

Popular cities in Portugal

Popular flights according to clicks in the last 7 days on momondo

Fly to other destinations from Seattle

According to popular flight searches on momondo this year

Complete your trip to Lisbon

Explore popular destinations other users love

According to popular flight searches on momondo this year