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Cheap flights from St. Louis to Seattle

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Find the cheapest flights from St. Louis to Seattle

Cheap return flights

These are some of the best return flight deals from St. Louis to Seattle that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from St. Louis to Seattle.

Cheap last-minute flights

Planning a quick getaway from St. Louis to Seattle? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to Seattle, so you can enjoy a seamless trip without stopovers.

Cheap bus & train deals from St. Louis to Seattle

Find recent round-trip train or bus tickets from St. Louis to Seattle.

All round-trip flight deals to Seattle

The cheapest plane tickets to Seattle found on KAYAK recently.
STL-SEA
4h 37mdirect
SEA-STL
3h 54mdirect
American Airlines
Find Deal
STL-SEA
4h 42mdirect
SEA-STL
3h 56mdirect
Qatar Airways
Find Deal
STL-SEA
4h 38mdirect
SEA-STL
3h 54mdirect
Alaska Airlines
Find Deal
STL-SEA
4h 38mdirect
SEA-STL
3h 52mdirect
Japan Airlines
Find Deal
STL-SEA
4h 26mdirect
SEA-STL
3h 56mdirect
Finnair
Find Deal
STL-SEA
4h 42mdirect
SEA-STL
3h 54mdirect
Hawaiian Airlines
Find Deal
STL-SEA
4h 42mdirect
SEA-STL
3h 54mdirect
Air Tahiti Nui
Find Deal
STL-SEA
4h 37mdirect
American Airlines
Find Deal
STL-SEA
4h 42mdirect
Qatar Airways
Find Deal
STL-SEA
4h 38mdirect
Alaska Airlines
Find Deal
STL-SEA
4h 38mdirect
Japan Airlines
Find Deal
STL-SEA
4h 26mdirect
Finnair
Find Deal
STL-SEA
4h 42mdirect
Hawaiian Airlines
Find Deal
STL-SEA
4h 42mdirect
Air Tahiti Nui
Find Deal

See travel insights to Seattle from

How to get the cheapest flight ticket from St. Louis to Seattle

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 cheapest month to fly to Seattle?

The cheapest month to fly to Seattle from St. Louis is in January. Flight prices, which tend to average around R4 380, are often lower during this time because this is during the off-season. If you aren’t able to travel to Seattle during the month of January, then flying in February is also cheap. Prices for this month can be found on momondo for an average of R4 706.

What is the cheapest Lambert-St Louis to Seattle/Tacoma Intl flight route?

Fly from Lambert-St Louis to Seattle/Tacoma Intl for the best Lambert-St Louis - Seattle/Tacoma Intl flight prices

How far in advance should I book a flight to Seattle?

The ideal time to book your flight to Seattle is 38 days in advance, when prices tend to average R6 327. However, in the past 72 hours, people saw flights from St. Louis for as low as R77 313.

What cabin class options are available on Lambert-St Louis to Seattle/Tacoma Intl flights?

There are 1 cabin classes available to choose from on Lambert-St Louis to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have St. Louis to Seattle flight prices changed over time?

As of November 2024, prices for St. Louis to Seattle flights are approximately 1% cheaper when compared to flights at the same time last year.

When to book flights from St. Louis to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap St. Louis to Seattle (STL to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Seattle

Direct flights

None
There are no direct flights from St. Louis to Seattle. There are no popular flight routes from St. Louis to Seattle.

  • How far is Lambert-St Louis to Seattle/Tacoma Intl by plane?

    There are 2767,4 km between Lambert-St Louis and Seattle/Tacoma Intl.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Seattle/Tacoma Intl Airport?

    Prices for flights from Lambert-St Louis Airport to Seattle/Tacoma Intl Airport refresh daily.

  • How old do you have to be to fly from Lambert-St Louis Airport to Seattle/Tacoma Intl Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The travel and health documents you'll need for your trip to Seattle/Tacoma Intl 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 licence and a passport that is valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from St. Louis to Seattle?


Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Seattle?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Seattle. momondo saves you time and could save you money on your trip.

Can I find flights from St. Louis to Seattle with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Seattle from St. Louis with this policy.

How can momondo help me find flights from St. Louis to Seattle?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Seattle.

I’m not ready to book a flight from St. Louis to Seattle right now. Can momondo alert me if prices change?

Price alerts on flights to Seattle from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.


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