$520 Cheap Flights from Lyon (LYS) to Seattle (SEA)

View $520 flight on Wed, Oct 22, 2025Opens in a new window

Popular airlines from Saint-Exupery Airport (LYS) to Seattle-Tacoma International Airport (SEA)

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • one key icon

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Lyon to Seattle (LYS-SEA)

Prices were available within the past 7 days and start at $520 for one-way flights and $737 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Scandinavian Airlines
Thu, Oct 2 - Wed, Oct 22
LYS
Lyon
SEA
Seattle
$737 Roundtrip, found 3 days ago
$737
Roundtrip
found 3 days ago
Select Scandinavian Airlines flight, departing Thu, Oct 2 from Lyon to Seattle, returning Wed, Oct 22, priced at $737 found 3 days ago
British Airways
Sun, Nov 23 - Tue, Dec 2
LYS
Lyon
SEA
Seattle
$788 Roundtrip, found 1 day ago
$788
Roundtrip
found 1 day ago
Select British Airways flight, departing Sun, Nov 23 from Lyon to Seattle, returning Tue, Dec 2, priced at $788 found 1 day ago
British Airways
Tue, Feb 3 - Tue, Feb 24
LYS
Lyon
SEA
Seattle
$790 Roundtrip, found 9 hours ago
$790
Roundtrip
found 9 hours ago
Select British Airways flight, departing Tue, Feb 3 from Lyon to Seattle, returning Tue, Feb 24, priced at $790 found 9 hours ago
British Airways
Sun, Nov 23 - Tue, Dec 2
LYS
Lyon
SEA
Seattle
$792 Roundtrip, found 1 day ago
$792
Roundtrip
found 1 day ago
Select British Airways flight, departing Sun, Nov 23 from Lyon to Seattle, returning Tue, Dec 2, priced at $792 found 1 day ago
British Airways
Thu, Feb 5 - Tue, Feb 24
LYS
Lyon
SEA
Seattle
$794 Roundtrip, found 9 hours ago
$794
Roundtrip
found 9 hours ago
Select British Airways flight, departing Thu, Feb 5 from Lyon to Seattle, returning Tue, Feb 24, priced at $794 found 9 hours ago
British Airways
Sun, Nov 23 - Tue, Dec 2
LYS
Lyon
SEA
Seattle
$798 Roundtrip, found 1 day ago
$798
Roundtrip
found 1 day ago
Select British Airways flight, departing Sun, Nov 23 from Lyon to Seattle, returning Tue, Dec 2, priced at $798 found 1 day ago
Scandinavian Airlines
Tue, Oct 21 - Sun, Nov 9
LYS
Lyon
SEA
Seattle
$799 Roundtrip, found 3 days ago
$799
Roundtrip
found 3 days ago
Select Scandinavian Airlines flight, departing Tue, Oct 21 from Lyon to Seattle, returning Sun, Nov 9, priced at $799 found 3 days ago
Iberia
Sun, Nov 23 - Tue, Dec 2
LYS
Lyon
SEA
Seattle
$835 Roundtrip, found 1 day ago
$835
Roundtrip
found 1 day ago
Select Iberia flight, departing Sun, Nov 23 from Lyon to Seattle, returning Tue, Dec 2, priced at $835 found 1 day ago
Air Dolomiti
Tue, Sep 9 - Tue, Sep 16
LYS
Lyon
SEA
Seattle
$850 Roundtrip, found 6 days ago
$850
Roundtrip
found 6 days ago
Select Air Dolomiti flight, departing Tue, Sep 9 from Lyon to Seattle, returning Tue, Sep 16, priced at $850 found 6 days ago
Lufthansa
Thu, Mar 5 - Thu, Mar 12
LYS
Lyon
SEA
Seattle
$900 Roundtrip, found 2 days ago
$900
Roundtrip
found 2 days ago
Select Lufthansa flight, departing Thu, Mar 5 from Lyon to Seattle, returning Thu, Mar 12, priced at $900 found 2 days ago
Flights from Lyon (LYS) to Seattle (SEA)
Origin airport
Saint-Exupery
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Aer Lingus, Air Canada, British Airways, Brussels Airlines, Iberia, Lufthansa, Scandinavian Airlines, TAP Portugal
Roundtrip price
$736
Distance
5255 mi

Lyon to Seattle Flights

The cheapest times to fly from Lyon 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 Lyon to Seattle are during the month of October. You can find some of the cheapest flights from Lyon to Seattle with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Lyon to Seattle

Sunday is one of the best days to book for cheap flights from Lyon 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 Lyon 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 Lyon to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $520 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 Lyon 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 Lyon 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.

 

Frequently asked questions

How much does a flight from Saint-Exupery Airport (LYS) to Seattle - Tacoma Intl. Airport (SEA) cost?
Lock in a cheap one-way flight from $520 or cheap return flight from $737 from Saint-Exupery Airport (LYS) 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 Saint-Exupery Airport (LYS) to Seattle - Tacoma Intl. Airport (SEA)?
October is the cheapest month to fly from LYS to SEA. Avoiding peak travel times is often the key to finding a great deal.
What is the cheapest airline that flies from Saint-Exupery Airport (LYS) to Seattle - Tacoma Intl. Airport (SEA)?
To find the cheapest airline that'll fly you from LYS to SEA, use Expedia's filter tool. Tailor your search based on what's important to you, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from Saint-Exupery Airport (LYS) to Seattle - Tacoma Intl. Airport (SEA)?
There are no daily direct flights from Saint-Exupery Airport (LYS) to Seattle - Tacoma Intl. Airport (SEA). But you can book flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be soaring above the clouds in no time.
What day of the week has the most flights from LYS to SEA?
You'll generally find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Saint-Exupery Airport (LYS) to Seattle - Tacoma Intl. Airport (SEA)?
Choose a flight from Saint-Exupery Airport (LYS) to Seattle - Tacoma Intl. Airport (SEA) that leaves before 3 PM to reduce the likelihood of delays and cancellations. Later departures are on average 22% more likely to be canceled.**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 Saint-Exupery Airport (LYS) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Booking your plane ticket from LYS to SEA shortly before your journey is generally more expensive. But if you're flexible with your travel times and dates, you could snag a cheap last-minute fare.
Is it cheaper to book a LYS to SEA flight and hotel package?
You'll typically save money by booking a LYS to SEA flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one convenient place. Once you've chosen your preferred flights and accommodations, consider adding extras like car rentals, tours and activities.
Can I cancel or change the date of my flight from Saint-Exupery Airport (LYS) to Seattle - Tacoma Intl. Airport (SEA)?
You can usually reschedule or cancel your LYS to SEA flight. However, if it's been more than 24 hours since booking, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find more information on our Customer Service portal.

Explore a world of travel with Expedia

*Available to One Key members.