$550 Cheap Flights from Lisbon (LIS) to Seattle (SEA)

View $550 flight on Mon, Jan 19, 2026Opens in a new window

Popular airlines from Humberto Delgado Airport (LIS) to Seattle-Tacoma International Airport (SEA)

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Cheap Flights from Lisbon to Seattle (LIS-SEA)

Prices were available within the past 7 days and start at $550 for one-way flights and $802 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Aer Lingus
Tue, Apr 21 - Tue, May 5
LIS
Lisbon
SEA
Seattle
$802 Roundtrip, found 2 days ago
$802
Roundtrip
found 2 days ago
Select Aer Lingus flight, departing Tue, Apr 21 from Lisbon to Seattle, returning Tue, May 5, priced at $802 found 2 days ago
Scandinavian Airlines
Sat, May 9 - Tue, May 26
LIS
Lisbon
SEA
Seattle
$867 Roundtrip, found 3 days ago
$867
Roundtrip
found 3 days ago
Select Scandinavian Airlines flight, departing Sat, May 9 from Lisbon to Seattle, returning Tue, May 26, priced at $867 found 3 days ago
Lufthansa
Tue, Apr 21 - Tue, May 5
LIS
Lisbon
SEA
Seattle
$876 Roundtrip, found 2 days ago
$876
Roundtrip
found 2 days ago
Select Lufthansa flight, departing Tue, Apr 21 from Lisbon to Seattle, returning Tue, May 5, priced at $876 found 2 days ago
Air Canada
Tue, May 5 - Tue, May 26
LIS
Lisbon
SEA
Seattle
$884 Roundtrip, found 4 days ago
$884
Roundtrip
found 4 days ago
Select Air Canada flight, departing Tue, May 5 from Lisbon to Seattle, returning Tue, May 26, priced at $884 found 4 days ago
British Airways
Tue, Apr 14 - Tue, Apr 21
LIS
Lisbon
SEA
Seattle
$885 Roundtrip, found 3 days ago
$885
Roundtrip
found 3 days ago
Select British Airways flight, departing Tue, Apr 14 from Lisbon to Seattle, returning Tue, Apr 21, priced at $885 found 3 days ago
Delta
Wed, Nov 12 - Tue, Dec 2
LIS
Lisbon
SEA
Seattle
$891 Roundtrip, found 1 day ago
$891
Roundtrip
found 1 day ago
Select Delta flight, departing Wed, Nov 12 from Lisbon to Seattle, returning Tue, Dec 2, priced at $891 found 1 day ago
Iberia
Thu, Nov 6 - Fri, Jan 9
LIS
Lisbon
SEA
Seattle
$895 Roundtrip, found 3 days ago
$895
Roundtrip
found 3 days ago
Select Iberia flight, departing Thu, Nov 6 from Lisbon to Seattle, returning Fri, Jan 9, priced at $895 found 3 days ago
Swiss International Air Lines
Thu, May 28 - Sat, Jun 6
LIS
Lisbon
SEA
Seattle
$896 Roundtrip, found 6 days ago
$896
Roundtrip
found 6 days ago
Select Swiss International Air Lines flight, departing Thu, May 28 from Lisbon to Seattle, returning Sat, Jun 6, priced at $896 found 6 days ago
American Airlines
Tue, Apr 21 - Tue, May 5
LIS
Lisbon
SEA
Seattle
$907 Roundtrip, found 2 days ago
$907
Roundtrip
found 2 days ago
Select American Airlines flight, departing Tue, Apr 21 from Lisbon to Seattle, returning Tue, May 5, priced at $907 found 2 days ago
United
Wed, May 27 - Wed, Jun 17
LIS
Lisbon
SEA
Seattle
$908 Roundtrip, found 3 days ago
$908
Roundtrip
found 3 days ago
Select United flight, departing Wed, May 27 from Lisbon to Seattle, returning Wed, Jun 17, priced at $908 found 3 days ago

Find the cheapest month to fly from Lisbon (LIS) to Seattle (SEA)

May is typically the cheapest month to fly

From $664 - $1,089 per traveler.

Alternative airports near Seattle

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Seattle - Tacoma Intl. SEA. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $891
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from $891

Frequently asked questions

How much does a flight from Humberto Delgado Airport (LIS) to Seattle - Tacoma Intl. Airport (SEA) cost?
Snag a cheap one-way flight from $550 or cheap return flight from $802 from Humberto Delgado Airport (LIS) to Seattle - Tacoma Intl. Airport (SEA) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Humberto Delgado Airport (LIS) to Seattle - Tacoma Intl. Airport (SEA)?
April is the most affordable month to fly from LIS to SEA. Avoiding peak travel times is often the key to better flight prices.
What is the cheapest airline that flies from Humberto Delgado Airport (LIS) to Seattle - Tacoma Intl. Airport (SEA)?
To find the cheapest airline that'll fly you from LIS to SEA, use Expedia's filter tool. Customize your search based on what's important to you, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Humberto Delgado Airport (LIS) to Seattle - Tacoma Intl. Airport (SEA)?
There aren't any daily direct flights departing from Humberto Delgado Airport (LIS) to Seattle - Tacoma Intl. Airport (SEA). But you can opt for flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be cruising above the clouds in no time.
What day of the week has the most flights from LIS to SEA?
You'll typically find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Humberto Delgado Airport (LIS) to Seattle - Tacoma Intl. Airport (SEA)?
To arrive at Seattle - Tacoma Intl. Airport (SEA) on time, pick a flight that leaves from Humberto Delgado Airport (LIS) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Humberto Delgado Airport (LIS) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Last-minute bookings from LIS to SEA are typically more expensive. For the best rates, start looking for flights as early as possible. That said, if you can play around with your travel dates, you may find a cheap fare right before your trip.
Is it cheaper to book a LIS to SEA flight and hotel package?
Opting for a LIS to SEA flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels in one place. Select from our wide range of stays and then add car rentals, flights and activities to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Humberto Delgado Airport (LIS) to Seattle - Tacoma Intl. Airport (SEA)?
It's usually possible to cancel or reschedule your LIS to SEA flight. However, for bookings made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find further details on our Customer Service portal.

Travel information

Origin airport
Humberto Delgado
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Aer Lingus, Air Canada, Air Europa, Air France, American Airlines, British Airways, Brussels Airlines, Delta, Emirates, Finnair, Iberia, Icelandair, KLM, Lufthansa, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United, Virgin Atlantic
Roundtrip price
$802
Distance
5202 mi

Book with confidence

Lisbon to Seattle Flights

The cheapest times to fly from Lisbon to Seattle

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Lisbon to Seattle are during the month of April. You can find some of the cheapest flights from Lisbon to Seattle with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Lisbon to Seattle

Sunday is one of the best days to book for cheap flights from Lisbon to Seattle: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Lisbon to Seattle

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Lisbon to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $550 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Lisbon to Seattle flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Lisbon to Seattle airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Lisbon to Seattle Flights

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*Available to One Key members.