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Cheap flights from Seattle to St. Louis

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Find the cheapest flights from Seattle to St. Louis

Cheap return flights

These are some of the best return flight deals from Seattle to St. Louis 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 Seattle to St. Louis.

Cheap last-minute flights

Planning a quick getaway from Seattle to St. Louis? 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 St. Louis, so you can enjoy a seamless trip without stopovers.

Cheap bus & train deals from Seattle to St. Louis

Find recent return train or bus tickets from Seattle to St. Louis.

All return flight deals from Seattle to St. Louis

The cheapest plane tickets from Seattle to St. Louis found on KAYAK recently.
SEA-STL
3h 53mdirect
STL-SEA
4h 24mdirect
American Airlines
Find Deal
SEA-STL
3h 56mdirect
STL-SEA
4h 24mdirect
Qatar Airways
Find Deal
SEA-STL
3h 53mdirect
STL-SEA
4h 24mdirect
Alaska Airlines
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SEA-STL
3h 52mdirect
STL-SEA
4h 24mdirect
Japan Airlines
Find Deal
SEA-STL
3h 45mdirect
STL-SEA
4h 20mdirect
Southwest
Find Deal
SEA-STL
3h 56mdirect
STL-SEA
4h 24mdirect
Finnair
Find Deal
SEA-STL
3h 53mdirect
STL-SEA
4h 24mdirect
Hawaiian Airlines
Find Deal
SEA-STL
3h 53mdirect
STL-SEA
4h 24mdirect
Air Tahiti Nui
Find Deal
SEA-STL
3h 53mdirect
American Airlines
Find Deal
SEA-STL
3h 56mdirect
Qatar Airways
Find Deal
SEA-STL
3h 53mdirect
Alaska Airlines
Find Deal
SEA-STL
3h 52mdirect
Japan Airlines
Find Deal
SEA-STL
3h 45mdirect
Southwest
Find Deal
SEA-STL
3h 56mdirect
Finnair
Find Deal
SEA-STL
3h 53mdirect
Hawaiian Airlines
Find Deal
SEA-STL
3h 53mdirect
Air Tahiti Nui
Find Deal
SEA-STL
3h 52mdirect
Singapore Airlines
Find Deal

See travel insights to St. Louis from

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

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 St. Louis?

In general, January is the cheapest month to fly from Seattle to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around R5 545. If you aren’t able to travel to St. Louis 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 R5 563.

How far in advance should I book a flight to St. Louis?

You are more likely to see cheaper flights to St. Louis from Seattle when booking 4 weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around R6 850 when searching 4 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Seattle for as low as R6 032 on momondo.

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

As of January 2025, prices for Seattle to St. Louis flights are approximately 13% more expensive when compared to flights at the same time last year.

When to book flights from Seattle to St. Louis

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

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

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

Direct flights

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

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

    The straight-line distance from Seattle/Tacoma Intl to Lambert-St Louis is 2767,4 km.

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

    Prices for flights from Seattle/Tacoma Intl Airport to Lambert-St Louis Airport are refreshed on a daily basis.

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and stopovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents you'll need for your trip to Lambert-St Louis 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 Lambert-St Louis 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 Seattle to St. Louis?


Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Seattle to St. Louis . Millions of users trust and use momondo every year so you are in good hands.

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

Yes. momondo allows you to filter the results for Seattle to St. Louis flights to just show those with flexible booking policies.

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

momondo provides multiple filters to help you find the best flight to St. Louis from Seattle. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes. momondo can track prices for Seattle to St. Louis flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.


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