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Cheap flights from Seattle to Lisbon from $242

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 4/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Seattle to Lisbon

Cheap round-trip flights

Enter your travel dates to find the best prices.
Lufthansa Logo
6:50 pm - 10:45 pm
SEA
-
LIS
19h 55m
1 stop
Lufthansa Logo
6:15 am - 10:42 pm
LIS
-
SEA
24h 27m
2 stops
$622Lufthansa
Sun, Apr 19 - Tue, Apr 28
Lufthansa Logo
6:50 pm - 10:45 pm
SEA
-
LIS
19h 55m
1 stop
Lufthansa Logo
5:05 am - 12:20 pm
LIS
-
SEA
15h 15m
1 stop
$630Lufthansa
Sun, Apr 19 - Tue, Apr 28
Lufthansa Logo
2:10 pm - 11:35 pm
SEA
-
LIS
25h 25m
1 stop
Lufthansa Logo
5:05 am - 12:20 pm
LIS
-
SEA
15h 15m
1 stop
$633Lufthansa
Mon, Apr 20 - Mon, Apr 27
Lufthansa Logo
6:50 pm - 10:45 pm
SEA
-
LIS
19h 55m
1 stop
Lufthansa Logo
5:05 am - 12:20 pm
LIS
-
SEA
15h 15m
1 stop
$640Lufthansa
Fri, Apr 17 - Thu, Apr 30
Lufthansa Logo
6:50 pm - 10:45 pm
SEA
-
LIS
19h 55m
1 stop
Lufthansa Logo
5:05 am - 12:20 pm
LIS
-
SEA
15h 15m
1 stop
$641Lufthansa
Fri, Apr 17 - Tue, Apr 21
Aer Lingus Logo
7:10 pm - 9:35 pm
SEA
-
LIS
18h 25m
1 stop
Aer Lingus Logo
10:15 pm - 5:10 pm
LIS
-
SEA
26h 55m
1 stop
$647Aer Lingus
Thu, Apr 23 - Fri, May 8
Multiple Airlines Logo
8:00 am - 9:20 am
SEA
-
LIS
17h 20m
2 stops
Multiple Airlines Logo
5:05 am - 12:20 pm
LIS
-
SEA
15h 15m
1 stop
$650Multiple Airlines
Mon, Apr 20 - Mon, Apr 27
Lufthansa Logo
6:50 pm - 10:45 pm
SEA
-
LIS
19h 55m
1 stop
Lufthansa Logo
5:05 am - 12:20 pm
LIS
-
SEA
15h 15m
1 stop
$655Lufthansa
Wed, Apr 22 - Thu, Apr 30
British Airways Logo
8:20 pm - 11:15 pm
SEA
-
LIS
18h 55m
1 stop
British Airways Logo
11:05 am - 9:23 pm
LIS
-
SEA
18h 18m
1 stop
$656British Airways
Wed, Apr 29 - Wed, May 6
United Airlines Logo
6:50 pm - 10:45 pm
SEA
-
LIS
19h 55m
1 stop
United Airlines Logo
5:05 am - 12:20 pm
LIS
-
SEA
15h 15m
1 stop
$657United Airlines
Fri, Apr 17 - Tue, Apr 21

British Airways flights from Seattle to Lisbon

Our best British Airways deals on Seattle to Lisbon flight tickets
British Airways
Apr 29
SEA8:20 pmSeattle/Tacoma Intl
18h 55m
1 stop
LIS11:15 pmLisbon Humberto Delgado
May 6
LIS11:05 amLisbon Humberto Delgado
18h 18m
1 stop
SEA9:23 pmSeattle/Tacoma Intl
$656
British Airways
Apr 7
SEA8:20 pmSeattle/Tacoma Intl
13h 35m
1 stop
LIS5:55 pmLisbon Humberto Delgado
Apr 15
LIS11:05 amLisbon Humberto Delgado
18h 18m
1 stop
SEA9:23 pmSeattle/Tacoma Intl
$665

Turkish Airlines flights from Seattle to Lisbon

Our best Turkish Airlines deals on Seattle to Lisbon flight tickets
Turkish Airlines
Apr 20
SEA7:10 pmSeattle/Tacoma Intl
20h 25m
1 stop
LIS11:35 pmLisbon Humberto Delgado
May 8
LIS4:45 pmLisbon Humberto Delgado
32h 30m
1 stop
SEA5:15 pmSeattle/Tacoma Intl
$661
Turkish Airlines
Apr 20
SEA7:10 pmSeattle/Tacoma Intl
20h 25m
1 stop
LIS11:35 pmLisbon Humberto Delgado
Apr 28
LIS10:55 amLisbon Humberto Delgado
38h 20m
1 stop
SEA5:15 pmSeattle/Tacoma Intl
$663
Turkish Airlines
Mar 31
SEA7:10 pmSeattle/Tacoma Intl
36h 25m
1 stop
LIS3:35 pmLisbon Humberto Delgado
Apr 21
LIS10:55 amLisbon Humberto Delgado
38h 20m
1 stop
SEA5:15 pmSeattle/Tacoma Intl
$664

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Lisbon that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated March 24, 2026.
Use the filters below to find and compare flights from Seattle to Lisbon that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 4/19

6:50 pm-10:45 pm

1 stop19h 55m

Lisbon Humberto Delgado

Tue 4/28

6:15 am-10:42 pm

2 stops24h 27m

$622

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 4/19

6:50 pm-10:45 pm

1 stop19h 55m

Lisbon Humberto Delgado

Tue 4/28

5:05 am-12:20 pm

1 stop15h 15m

$630

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 4/20

2:10 pm-11:35 pm

1 stop25h 25m

Lisbon Humberto Delgado

Mon 4/27

5:05 am-12:20 pm

1 stop15h 15m

$633

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 4/17

6:50 pm-10:45 pm

1 stop19h 55m

Lisbon Humberto Delgado

Thu 4/30

5:05 am-12:20 pm

1 stop15h 15m

$640

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 4/17

6:50 pm-10:45 pm

1 stop19h 55m

Lisbon Humberto Delgado

Tue 4/21

5:05 am-12:20 pm

1 stop15h 15m

$641

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 4/23

7:10 pm-9:35 pm

1 stop18h 25m

Lisbon Humberto Delgado

Fri 5/8

10:15 pm-5:10 pm

1 stop26h 55m

$647
Quickest round-trip

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 4/20

8:00 am-9:20 am

2 stops17h 20m

Lisbon Humberto Delgado

Mon 4/27

5:05 am-12:20 pm

1 stop15h 15m

$650

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 4/22

6:50 pm-10:45 pm

1 stop19h 55m

Lisbon Humberto Delgado

Thu 4/30

5:05 am-12:20 pm

1 stop15h 15m

$655

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 4/29

8:20 pm-11:15 pm

1 stop18h 55m

Lisbon Humberto Delgado

Wed 5/6

11:05 am-9:23 pm

1 stop18h 18m

$656

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 4/17

6:50 pm-10:45 pm

1 stop19h 55m

Lisbon Humberto Delgado

Tue 4/21

5:05 am-12:20 pm

1 stop15h 15m

$657

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Lisbon from

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?

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 $552.

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 $812 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 $735 on momondo.

Can stopping save me money on Seattle to Lisbon flights?

You could potentially save up to 1% 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 19% 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

18h 25m

Direct flights

None
The fastest flight from Seattle to Lisbon takes 18h 25m
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. 18h 25m 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?

  • 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?

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
IcelandairPriceFrom $348Free CancellationRating
7.0
625 reviews
Search Icelandair flights
British AirwaysPriceFrom $482Free CancellationRating
6.7
7,813 reviews
Search British Airways flights
LufthansaPriceFrom $484Free CancellationRating
6.8
7,864 reviews
Search Lufthansa flights
United AirlinesPriceFrom $494Free CancellationRating
7.4
9,467 reviews
Search United Airlines flights
KLMPriceFrom $503Free CancellationRating
7.8
1,477 reviews
Search KLM flights
Air FrancePriceFrom $526Free CancellationRating
7.4
1,550 reviews
Search Air France flights
Air CanadaPriceFrom $543Free CancellationRating
7.1
10,836 reviews
Search Air Canada flights
DeltaPriceFrom $545Free CancellationRating
7.9
8,320 reviews
Search Delta flights
Aer LingusPriceFrom $553Free CancellationRating
7.2
1,487 reviews
Search Aer Lingus flights
American AirlinesPriceFrom $558Free CancellationRating
7.1
11,492 reviews
Search American Airlines flights

Traveling to a place near Lisbon?

Book flights to Lisbon if you plan to visit one of these locations
Sintra
Fátima
Ericeira
Nazaré
Setúbal
Peniche
Estoril
Evora
Oeiras
Sesimbra
Leiria
Figueira da Foz
Tomar
Zambujeira do Mar
Óbidos
Batalha
Sines
Torres Vedras
Comporta
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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