How does KAYAK find such low prices on flights from Washington to St. Louis?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington to St. Louis. Visit our flight page for the latest deals!>/a>

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington to St. Louis?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Washington is likely to change within 7 days, so travelers know whether to wait or book now. Visit our flight page for the latest deals!>/a>

What is the Hacker Fare option on flights from Washington to St. Louis?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Washington with another airline. Visit our flight page for the latest deals!>/a>

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington to St. Louis?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. Visit our flight page for the latest deals!>/a>

$85 CHEAP FLIGHTS from Washington to St. Louis

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Cheap Flights from Washington to St. Louis

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Washington to St. Louis that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Washington to St. Louis

Wed, Jul 9 - Wed, Jul 16

11:30 am - 5:30 pmSEA-STL

4h 00mnonstop

6:15 pm - 12:15 amSTL-SEA

8h 00m1 stop

$179Southwest

Find Deal

Tue, Sep 16 - Tue, Sep 23

7:00 am - 3:44 pmSEA-STL

6h 44m1 stop

5:49 pm - 10:59 pmSTL-SEA

7h 10m1 stop

$180United Airlines

Find Deal

Fri, Aug 1 - Mon, Aug 4

11:59 pm - 10:33 amSEA-STL

8h 34m1 stop

7:15 pm - 11:59 pmSTL-SEA

6h 44m1 stop

$189Delta

Find Deal

Tue, Aug 5 - Tue, Aug 19

11:56 pm - 9:29 amSEA-STL

7h 33m1 stop

3:43 pm - 10:00 pmSTL-SEA

8h 17m1 stop

$209American Airlines

Find Deal

Tue, Aug 5 - Tue, Aug 19

11:56 pm - 9:29 amSEA-STL

7h 33m1 stop

4:19 pm - 11:40 pmSTL-SEA

9h 21m1 stop

$218American Airlines

Find Deal

Fri, Aug 15 - Mon, Aug 18

11:55 pm - 8:34 amSEA-STL

6h 39m1 stop

7:11 pm - 12:06 amSTL-SEA

6h 55m1 stop

$223Delta

Find Deal

Wed, Oct 1 - Tue, Oct 7

6:05 am - 9:07 amPDX-STL

25h 02m1 stop

7:52 pm - 10:39 pmSTL-PDX

28h 47m1 stop

$244Frontier

Find Deal

Thu, Nov 6 - Sun, Nov 9

3:45 pm - 1:34 pmSEA-STL

19h 49m1 stop

2:19 pm - 3:00 pmSTL-SEA

26h 41m1 stop

$248Frontier

Find Deal

Thu, Jul 31 - Tue, Aug 5

6:06 pm - 11:59 pmSEA-STL

3h 53mnonstop

3:24 pm - 5:50 pmSTL-SEA

4h 26mnonstop

$249Alaska Airlines

Find Deal

Mon, Jul 28 - Mon, Aug 4

6:06 pm - 11:59 pmSEA-STL

3h 53mnonstop

3:24 pm - 5:50 pmSTL-SEA

4h 26mnonstop

$289Alaska Airlines

Find Deal

Useful Info

Low season	January
High season	July
Cheapest flight	$85

Best time to beat the crowds with an average 1% drop in price.

Most popular time to fly and prices are also 8% lower on average.

Flight from Seattle to St. Louis

How does KAYAK find such low prices on flights from Washington to St. Louis?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington to St. Louis.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington to St. Louis?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Washington is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Washington to St. Louis?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Washington with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington to St. Louis?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Everything you need to know for your flight to St. Louis

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on the airport you'll fly into in St. Louis

St. Louis (STL)

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.

STL

$85 Find Cheap Flights from Washington to St. Louis

KAYAK searches hundreds of travel sites at once for deals on flights to St. Louis

Cheap Flights from Washington to St. Louis

Recent round-trip flight deals from Washington to St. Louis

Recent one-way flight deals from Washington to St. Louis

Recent last minute flight deals from Washington to St. Louis

Recent direct flight deals from Washington to St. Louis

Good to know

FAQs for booking flights from Washington to St. Louis

How does KAYAK find such low prices on flights from Washington to St. Louis?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington to St. Louis.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington to St. Louis?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Washington is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Washington to St. Louis?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Washington with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington to St. Louis?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Everything you need to know for your flight to St. Louis

Information on the airport you'll fly into in St. Louis

Cabin class types available on flights to Washington

Complete your trip to St. Louis with a hotel stay or car rental

Find direct flights for St. Louis

Flights to other popular destinations

Flights from domestic origins to St. Louis

Choose which airport to fly into in St. Louis

Find deals for your return flight