₹8,983 Cheap Flights from St. Louis (STL) to Seattle (SEA)

If you're travelling between Lambert-St. Louis Intl. Airport (STL) and SEA, round-trip flights start from ₹35,631. This price is based on airfares available within the last 7 days on Expedia for flights departing within the next year, so don't delay. Book now and save yourself money and time. Prices and availability are subject to change. Additional terms apply.

Each airline has different terms and conditions. If you decide to cancel your holiday, visit our Customer Service Portal.

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 Lambert Field to Sea-Tac Airport flights, you'll see a "no change fees" filter for you to select.

It's around 2,700 kilometres between STL and SEA, so you'll be strapped into your seat for a while. Keep yourself entertained with things like your e-reader or a thrilling novel.

Offering 30 flights each month, Alaska Airlines (AS) is a popular choice when flying directly from St. Louis Lambert International Airport to Sea-Tac Airport.

Last-minute bookings from St. Louis Lambert International Airport to Sea-Tac Airport can be hit-or-miss. It is possible to find a bargain, but then again, you could miss out altogether! If you'd rather play it safe and start planning your trip ahead of time, Expedia compares flight deals up to 12 months in advance. Just bear in mind that not all airlines publish their prices so far in advance. Our advice? Check back often as prices are updated regularly.