£412 Cheap Flights from Lisbon (LIS) to Seattle (SEA)

View £412 flight on Tue, 7 Oct 2025Opens 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 (LIS) to Seattle (SEA)

Prices were available within the past 7 days and start at £412 for one-way flights and £640 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Lufthansa
Wed, 10 Sep - Tue, 16 Sep
LIS
Lisbon
SEA
Seattle
£640 Return, found 3 days ago
£640
Return
found 3 days ago
Select Lufthansa flight, departing Wed, 10 Sep from Lisbon to Seattle, returning Tue, 16 Sep, priced at £640 found 3 days ago
Aer Lingus
Tue, 9 Sep - Mon, 15 Sep
LIS
Lisbon
SEA
Seattle
£642 Return, found 3 days ago
£642
Return
found 3 days ago
Select Aer Lingus flight, departing Tue, 9 Sep from Lisbon to Seattle, returning Mon, 15 Sep, priced at £642 found 3 days ago
Aer Lingus
Mon, 8 Sep - Mon, 15 Sep
LIS
Lisbon
SEA
Seattle
£645 Return, found 3 days ago
£645
Return
found 3 days ago
Select Aer Lingus flight, departing Mon, 8 Sep from Lisbon to Seattle, returning Mon, 15 Sep, priced at £645 found 3 days ago
Lufthansa
Wed, 10 Sep - Tue, 16 Sep
LIS
Lisbon
SEA
Seattle
£649 Return, found 3 days ago
£649
Return
found 3 days ago
Select Lufthansa flight, departing Wed, 10 Sep from Lisbon to Seattle, returning Tue, 16 Sep, priced at £649 found 3 days ago
Aer Lingus
Tue, 9 Sep - Tue, 16 Sep
LIS
Lisbon
SEA
Seattle
£651 Return, found 3 days ago
£651
Return
found 3 days ago
Select Aer Lingus flight, departing Tue, 9 Sep from Lisbon to Seattle, returning Tue, 16 Sep, priced at £651 found 3 days ago
Swiss International Air Lines
Wed, 10 Sep - Mon, 15 Sep
LIS
Lisbon
SEA
Seattle
£651 Return, found 3 days ago
£651
Return
found 3 days ago
Select Swiss International Air Lines flight, departing Wed, 10 Sep from Lisbon to Seattle, returning Mon, 15 Sep, priced at £651 found 3 days ago
Lufthansa
Tue, 9 Sep - Mon, 15 Sep
LIS
Lisbon
SEA
Seattle
£652 Return, found 3 days ago
£652
Return
found 3 days ago
Select Lufthansa flight, departing Tue, 9 Sep from Lisbon to Seattle, returning Mon, 15 Sep, priced at £652 found 3 days ago
Air Canada
Wed, 10 Sep - Mon, 15 Sep
LIS
Lisbon
SEA
Seattle
£654 Return, found 3 days ago
£654
Return
found 3 days ago
Select Air Canada flight, departing Wed, 10 Sep from Lisbon to Seattle, returning Mon, 15 Sep, priced at £654 found 3 days ago
Virgin Atlantic
Wed, 10 Sep - Mon, 15 Sep
LIS
Lisbon
SEA
Seattle
£683 Return, found 3 days ago
£683
Return
found 3 days ago
Select Virgin Atlantic flight, departing Wed, 10 Sep from Lisbon to Seattle, returning Mon, 15 Sep, priced at £683 found 3 days ago
British Airways
Tue, 9 Sep - Mon, 15 Sep
LIS
Lisbon
SEA
Seattle
£692 Return, found 3 days ago
£692
Return
found 3 days ago
Select British Airways flight, departing Tue, 9 Sep from Lisbon to Seattle, returning Mon, 15 Sep, priced at £692 found 3 days ago
Flight from Lisbon to Seattle route information
Origin airport
Humberto Delgado
Destination airport
Seattle - Tacoma Intl.
Return price
£640
Distance
8323 km

Compare flights from Lisbon to Seattle easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Lisbon to Seattle. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Seattle - Tacoma Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Humberto Delgado to Seattle - Tacoma Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Humberto Delgado (LIS) to Seattle - Tacoma Intl. (SEA)

The easiest way to view the best deals on flights from Lisbon to Seattle today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Humberto Delgado to Seattle - Tacoma Intl. start at just £640 and range up to £733.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Lisbon and Seattle
  • booking your flight during September, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Lisbon to Seattle flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Humberto Delgado to Seattle - Tacoma Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Frequently asked questions

How much is a flight from Lisbon/Portela Airport to Seattle - Tacoma Intl. Airport (SEA)?
Within the past 7 days on Expedia, for flights departing within the next year, the lowest price available for a round-trip journey from Lisbon Airport to SEA was £640. Fares this good don't last forever, so make sure you book yours today. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from LIS to Sea-Tac Airport?
This can vary from airline to airline, as each one has its own set of terms and conditions. Visit the Customer Service Portal, where there are simple instructions on how to cancel your flight online.
How do I find cheap flights from LIS to SEA that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Lisbon Airport to Sea-Tac Airport flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Lisbon/Portela Airport to SEA?
The distance is around 8,400 kilometres, so pack your carry-on luggage with all the items you need to make your journey comfortable. Wondering what to take on board your Lisbon District to SeaTac flight? Earplugs, a sleep mask and a neck pillow are a few essentials.
Which airlines fly direct from LIS to Sea-Tac Airport?
Flying directly between Lisbon Airport and Seattle - Tacoma Intl. Airport (SEA) isn't possible at the moment. However, you'll still be able to book a flight to SeaTac with at least one stop.
Are LIS to SEA flight tickets cheaper when they're purchased at the last minute?
Last-minute planners can occasionally score a bargain, with some of the cheapest fares from Lisbon/Portela Airport to Sea-Tac Airport surfacing a few weeks before the departure date. If you'd rather book ahead, Expedia compares and updates the best flight deals continuously --- as early as 12 months in advance in some cases. It does depend on the carrier though, as not every airline releases prices that far in advance.

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