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Cheap flights from Seattle to Lisbon from $266

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 4/27. 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
3:40 pm - 9:20 am
SEA
-
LIS
33h 40m
2 stops
Lufthansa Logo
5:05 am - 12:20 pm
LIS
-
SEA
15h 15m
1 stop
$484Lufthansa
Mon, Apr 20 - Wed, Apr 29
United Airlines Logo
8:17 am - 10:15 am
SEA
-
LIS
17h 58m
1 stop
United Airlines Logo
5:00 am - 1:10 pm
LIS
-
SEA
15h 10m
1 stop
$485United Airlines
Tue, Mar 3 - Fri, Mar 20
Delta Logo
6:40 pm - 5:50 pm
SEA
-
LIS
15h 10m
1 stop
Delta Logo
5:00 am - 4:30 pm
LIS
-
SEA
19h 30m
1 stop
$486Delta
Tue, Apr 14 - Thu, Apr 23
KLM Logo
7:23 am - 8:00 am
SEA
-
LIS
16h 37m
1 stop
KLM Logo
7:45 pm - 11:45 am
LIS
-
SEA
24h 00m
1 stop
$487KLM
Sun, Apr 19 - Wed, Apr 29
Delta Logo
6:40 pm - 8:50 am
SEA
-
LIS
30h 10m
1 stop
Delta Logo
11:55 am - 11:45 am
LIS
-
SEA
31h 50m
1 stop
$488Delta
Mon, Apr 13 - Wed, Apr 22
United Airlines Logo
11:59 pm - 10:30 am
SEA
-
LIS
26h 31m
2 stops
United Airlines Logo
5:05 am - 12:20 pm
LIS
-
SEA
15h 15m
1 stop
$490United Airlines
Sat, Apr 18 - Mon, Apr 27
Delta Logo
9:50 am - 2:55 pm
SEA
-
LIS
21h 05m
2 stops
Delta Logo
5:00 am - 4:30 pm
LIS
-
SEA
19h 30m
1 stop
$491Delta
Tue, Apr 21 - Wed, Apr 29
Delta Logo
5:30 am - 5:30 pm
SEA
-
LIS
28h 00m
2 stops
Delta Logo
5:00 am - 12:35 pm
LIS
-
SEA
14h 35m
1 stop
$492Delta
Fri, Feb 27 - Thu, Mar 19
Delta Logo
6:40 pm - 5:50 pm
SEA
-
LIS
15h 10m
1 stop
Delta Logo
5:35 am - 11:15 am
LIS
-
SEA
13h 40m
1 stop
$493Delta
Tue, Apr 14 - Tue, Apr 28
Multiple Airlines Logo
8:00 pm - 9:20 am
SEA
-
LIS
29h 20m
2 stops
Multiple Airlines Logo
5:55 am - 9:51 pm
LIS
-
SEA
23h 56m
2 stops
$494Multiple Airlines
Mon, Apr 20 - Wed, Apr 29

United Airlines flights from Seattle to Lisbon

Our best United Airlines deals on Seattle to Lisbon flight tickets
United Airlines
Mar 3
SEA8:17 amSeattle/Tacoma Intl
17h 58m
1 stop
LIS10:15 amLisbon Humberto Delgado
Mar 20
LIS5:00 amLisbon Humberto Delgado
15h 10m
1 stop
SEA1:10 pmSeattle/Tacoma Intl
$485
United Airlines
Apr 18
SEA11:59 pmSeattle/Tacoma Intl
26h 31m
2 stops
LIS10:30 amLisbon Humberto Delgado
Apr 27
LIS5:05 amLisbon Humberto Delgado
15h 15m
1 stop
SEA12:20 pmSeattle/Tacoma Intl
$490
United Airlines
Feb 2
SEA7:00 amSeattle/Tacoma Intl
17h 10m
2 stops
LIS8:10 amLisbon Humberto Delgado
Feb 26
LIS5:00 amLisbon Humberto Delgado
15h 10m
1 stop
SEA12:10 pmSeattle/Tacoma Intl
$494

Lufthansa flights from Seattle to Lisbon

Our best Lufthansa deals on Seattle to Lisbon flight tickets
Lufthansa
Apr 20
SEA3:40 pmSeattle/Tacoma Intl
33h 40m
2 stops
LIS9:20 amLisbon Humberto Delgado
Apr 29
LIS5:05 amLisbon Humberto Delgado
15h 15m
1 stop
SEA12:20 pmSeattle/Tacoma Intl
$484
Lufthansa
Apr 17
SEA2:10 pmSeattle/Tacoma Intl
23h 45m
1 stop
LIS9:55 pmLisbon Humberto Delgado
Apr 28
LIS5:05 amLisbon Humberto Delgado
15h 15m
1 stop
SEA12:20 pmSeattle/Tacoma Intl
$501
Lufthansa
Apr 16
SEA2:24 pmSeattle/Tacoma Intl
23h 51m
2 stops
LIS10:15 pmLisbon Humberto Delgado
Apr 29
LIS5:05 amLisbon Humberto Delgado
15h 15m
1 stop
SEA12:20 pmSeattle/Tacoma Intl
$505

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 January 27, 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

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 4/20

3:40 pm-9:20 am

2 stops33h 40m

Lisbon Humberto Delgado

Wed 4/29

5:05 am-12:20 pm

1 stop15h 15m

$484

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 3/3

8:17 am-10:15 am

1 stop17h 58m

Lisbon Humberto Delgado

Fri 3/20

5:00 am-1:10 pm

1 stop15h 10m

$485

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 4/14

6:40 pm-5:50 pm

1 stop15h 10m

Lisbon Humberto Delgado

Thu 4/23

5:00 am-4:30 pm

1 stop19h 30m

$486

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 4/19

7:23 am-8:00 am

1 stop16h 37m

Lisbon Humberto Delgado

Wed 4/29

7:45 pm-11:45 am

1 stop24h 00m

$487

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 4/13

6:40 pm-8:50 am

1 stop30h 10m

Lisbon Humberto Delgado

Wed 4/22

11:55 am-11:45 am

1 stop31h 50m

$488

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 4/18

11:59 pm-10:30 am

2 stops26h 31m

Lisbon Humberto Delgado

Mon 4/27

5:05 am-12:20 pm

1 stop15h 15m

$490

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 4/21

9:50 am-2:55 pm

2 stops21h 05m

Lisbon Humberto Delgado

Wed 4/29

5:00 am-4:30 pm

1 stop19h 30m

$491

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 2/27

5:30 am-5:30 pm

2 stops28h 00m

Lisbon Humberto Delgado

Thu 3/19

5:00 am-12:35 pm

1 stop14h 35m

$492

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 4/14

6:40 pm-5:50 pm

1 stop15h 10m

Lisbon Humberto Delgado

Tue 4/28

5:35 am-11:15 am

1 stop13h 40m

$493

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 4/20

8:00 pm-9:20 am

2 stops29h 20m

Lisbon Humberto Delgado

Wed 4/29

5:55 am-9:51 pm

2 stops23h 56m

$494

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 $504. If you are unable to visit Lisbon during the month of January, then departing from Seattle during the month November is also very affordable. Most momondo users find prices during this month for around $594.

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 $839 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 $742 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 January 2026, prices for Seattle to Lisbon flights are approximately 24% 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?

  • 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
7.1
603 reviews
Search Icelandair flights
British AirwaysPriceFrom $486Free CancellationRating
6.7
7,704 reviews
Search British Airways flights
LufthansaPriceFrom $488Free CancellationRating
6.8
7,749 reviews
Search Lufthansa flights
United AirlinesPriceFrom $498Free CancellationRating
7.4
9,209 reviews
Search United Airlines flights
Air CanadaPriceFrom $543Free CancellationRating
7.1
10,666 reviews
Search Air Canada flights
Air FrancePriceFrom $546Free CancellationRating
7.4
1,528 reviews
Search Air France flights
American AirlinesPriceFrom $558Free CancellationRating
7.2
11,201 reviews
Search American Airlines flights
KLMPriceFrom $560Free CancellationRating
7.7
1,443 reviews
Search KLM flights
DeltaPriceFrom $561Free CancellationRating
7.9
8,124 reviews
Search Delta flights
SWISSPriceFrom $562Free CancellationRating
7.6
1,863 reviews
Search SWISS flights

Traveling to a place near Lisbon?

Book flights to Lisbon if you plan to visit one of these locations
Sintra
Ericeira
Fátima
Nazaré
Setúbal
Estoril
Peniche
Leiria
Oeiras
Sesimbra
Evora
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.

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