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Cheap flights from Seattle to Lisbon from $299

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 8/15. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to Lisbon

Cheap round-trip flights

Enter your travel dates to find the best prices.
Icelandair Logo
2:35 pm - 12:50 pm
SEA
-
LIS
14h 15m
1 stop
Icelandair Logo
2:00 pm - 5:00 pm
LIS
-
SEA
35h 00m
1 stop
$610Icelandair
Wed, Nov 18 - Tue, Dec 1
Icelandair Logo
2:35 pm - 12:50 pm
SEA
-
LIS
14h 15m
1 stop
Icelandair Logo
2:00 pm - 5:00 pm
LIS
-
SEA
35h 00m
1 stop
$641Icelandair
Wed, Nov 18 - Tue, Dec 1
Multiple Airlines Logo
10:10 am - 10:40 am
SEA
-
LIS
16h 30m
2 stops
Multiple Airlines Logo
6:10 am - 6:22 pm
LIS
-
SEA
20h 12m
2 stops
$713Multiple Airlines
Mon, Nov 2 - Tue, Nov 10
Multiple Airlines Logo
10:10 am - 10:40 am
SEA
-
LIS
16h 30m
2 stops
Multiple Airlines Logo
5:00 am - 6:22 pm
LIS
-
SEA
21h 22m
2 stops
$724Multiple Airlines
Mon, Nov 2 - Tue, Nov 10
Icelandair Logo
2:35 pm - 12:50 pm
SEA
-
LIS
14h 15m
1 stop
Icelandair Logo
2:00 pm - 5:00 pm
LIS
-
SEA
35h 00m
1 stop
$726Icelandair
Wed, Nov 18 - Tue, Dec 1
Icelandair Logo
2:35 pm - 12:50 pm
SEA
-
LIS
14h 15m
1 stop
Icelandair Logo
2:00 pm - 5:00 pm
LIS
-
SEA
35h 00m
1 stop
$727Icelandair
Mon, Nov 2 - Tue, Nov 10
Lufthansa Logo
3:50 pm - 1:20 pm
SEA
-
LIS
14h 30m
1 stop
Lufthansa Logo
5:00 am - 12:00 pm
LIS
-
SEA
15h 00m
1 stop
$731Lufthansa
Wed, Oct 28 - Wed, Nov 25
Icelandair Logo
2:35 pm - 12:50 pm
SEA
-
LIS
14h 15m
1 stop
Icelandair Logo
2:00 pm - 5:00 pm
LIS
-
SEA
35h 00m
1 stop
$732Icelandair
Wed, Nov 18 - Thu, Dec 3
Lufthansa Logo
3:50 pm - 1:20 pm
SEA
-
LIS
14h 30m
1 stop
Lufthansa Logo
5:00 am - 12:00 pm
LIS
-
SEA
15h 00m
1 stop
$735Lufthansa
Wed, Oct 28 - Wed, Nov 25
Lufthansa Logo
3:15 pm - 10:40 am
SEA
-
LIS
35h 25m
2 stops
Lufthansa Logo
5:00 am - 12:00 pm
LIS
-
SEA
15h 00m
1 stop
$736Lufthansa
Sun, Nov 8 - Wed, Nov 18

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United Airlines flights from Seattle to Lisbon

Our best United Airlines deals on Seattle to Lisbon flight tickets
United Airlines
Nov 4
SEA7:00 amSeattle/Tacoma Intl
17h 10m
1 stop
LIS8:10 amLisbon Humberto Delgado
Nov 18
LIS5:00 amLisbon Humberto Delgado
15h 00m
1 stop
SEA12:00 pmSeattle/Tacoma Intl
$744
United Airlines
Nov 1
SEA8:10 amSeattle/Tacoma Intl
17h 55m
1 stop
LIS10:05 amLisbon Humberto Delgado
Nov 13
LIS6:10 amLisbon Humberto Delgado
14h 50m
1 stop
SEA1:00 pmSeattle/Tacoma Intl
$746
United Airlines
Jan 12
SEA6:50 amSeattle/Tacoma Intl
17h 20m
1 stop
LIS8:10 amLisbon Humberto Delgado
Jan 21
LIS5:00 amLisbon Humberto Delgado
15h 00m
1 stop
SEA12:00 pmSeattle/Tacoma Intl
$749

Lufthansa flights from Seattle to Lisbon

Our best Lufthansa deals on Seattle to Lisbon flight tickets
Lufthansa
Oct 28
SEA3:50 pmSeattle/Tacoma Intl
14h 30m
1 stop
LIS1:20 pmLisbon Humberto Delgado
Nov 25
LIS5:00 amLisbon Humberto Delgado
15h 00m
1 stop
SEA12:00 pmSeattle/Tacoma Intl
$731
Lufthansa
Oct 28
SEA3:50 pmSeattle/Tacoma Intl
14h 30m
1 stop
LIS1:20 pmLisbon Humberto Delgado
Nov 25
LIS5:00 amLisbon Humberto Delgado
15h 00m
1 stop
SEA12:00 pmSeattle/Tacoma Intl
$735
Lufthansa
Nov 8
SEA3:15 pmSeattle/Tacoma Intl
35h 25m
2 stops
LIS10:40 amLisbon Humberto Delgado
Nov 18
LIS5:00 amLisbon Humberto Delgado
15h 00m
1 stop
SEA12:00 pmSeattle/Tacoma Intl
$736

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 July 22, 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

Wed 11/18

2:35 pm-12:50 pm

1 stop14h 15m

Lisbon Humberto Delgado

Tue 12/1

2:00 pm-5:00 pm

1 stop35h 00m

$610

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 11/18

2:35 pm-12:50 pm

1 stop14h 15m

Lisbon Humberto Delgado

Tue 12/1

2:00 pm-5:00 pm

1 stop35h 00m

$641

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 11/2

10:10 am-10:40 am

2 stops16h 30m

Lisbon Humberto Delgado

Tue 11/10

6:10 am-6:22 pm

2 stops20h 12m

$713

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 11/2

10:10 am-10:40 am

2 stops16h 30m

Lisbon Humberto Delgado

Tue 11/10

5:00 am-6:22 pm

2 stops21h 22m

$724

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 11/18

2:35 pm-12:50 pm

1 stop14h 15m

Lisbon Humberto Delgado

Tue 12/1

2:00 pm-5:00 pm

1 stop35h 00m

$726

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 11/2

2:35 pm-12:50 pm

1 stop14h 15m

Lisbon Humberto Delgado

Tue 11/10

2:00 pm-5:00 pm

1 stop35h 00m

$727
Quickest round-trip

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 10/28

3:50 pm-1:20 pm

1 stop14h 30m

Lisbon Humberto Delgado

Wed 11/25

5:00 am-12:00 pm

1 stop15h 00m

$731

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 11/18

2:35 pm-12:50 pm

1 stop14h 15m

Lisbon Humberto Delgado

Thu 12/3

2:00 pm-5:00 pm

1 stop35h 00m

$732

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 10/28

3:50 pm-1:20 pm

1 stop14h 30m

Lisbon Humberto Delgado

Wed 11/25

5:00 am-12:00 pm

1 stop15h 00m

$735

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 11/8

3:15 pm-10:40 am

2 stops35h 25m

Lisbon Humberto Delgado

Wed 11/18

5:00 am-12:00 pm

1 stop15h 00m

$736

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 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 $481. 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 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 $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 $726 on momondo.

How have Seattle to Lisbon flight prices changed over time?

As of July 2026, prices for Seattle to Lisbon flights are approximately 47% 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

13h 55m

Direct flights

None
The fastest flight from Seattle to Lisbon takes 13h 55m
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 55m 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
716 reviews
Search Icelandair flights
Virgin AtlanticPriceFrom $420Free CancellationRating
7.5
693 reviews
Search Virgin Atlantic flights
LufthansaPriceFrom $475Free CancellationRating
6.8
8,159 reviews
Search Lufthansa flights
British AirwaysPriceFrom $482Free CancellationRating
6.7
8,127 reviews
Search British Airways flights
United AirlinesPriceFrom $488Free CancellationRating
7.4
10,024 reviews
Search United Airlines flights
American AirlinesPriceFrom $497Free CancellationRating
7.1
11,831 reviews
Search American Airlines flights
KLMPriceFrom $503Free CancellationRating
7.8
1,544 reviews
Search KLM flights
Air FrancePriceFrom $505Free CancellationRating
7.4
1,628 reviews
Search Air France flights
Aer LingusPriceFrom $523Free CancellationRating
7.3
1,678 reviews
Search Aer Lingus flights
Air CanadaPriceFrom $543Free CancellationRating
7.1
11,371 reviews
Search Air Canada flights

Traveling to a place near Lisbon?

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