How does KAYAK find such low prices on flights from District of Columbia 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 District of Columbia to St. Louis.

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

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from District of Columbia 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 District of Columbia 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 District of Columbia with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from District of Columbia 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 District of Columbia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

$126 CHEAP FLIGHTS from District of Columbia to St. Louis

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Flight Deals

Cheap Flights from District of Columbia to St. Louis

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 District of Columbia to St. Louis

Thu, Oct 1 - Mon, Oct 5

2:54 pm - 4:27 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 33mnonstop

5:08 pm - 8:18 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 10mnonstop

$237American Airlines

Mon, Sep 21 - Thu, Sep 24

7:59 pm - 9:24 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 25mnonstop

6:00 am - 9:19 amSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 19mnonstop

$237American Airlines

Tue, Sep 22 - Wed, Sep 23

6:50 pm - 8:00 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 10mnonstop

8:25 am - 11:25 amSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 00mnonstop

$237Southwest

Wed, Sep 23 - Tue, Oct 6

12:00 pm - 1:15 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 15mnonstop

1:20 pm - 4:20 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 00mnonstop

$237Southwest

Sat, Nov 14 - Mon, Nov 16

1:00 pm - 7:14 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

7h 14m1 stop Denver Intl

7:59 pm - 9:50 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

24h 51m1 stop Denver Intl

$238Frontier

Fri, Oct 16 - Mon, Oct 19

6:00 pm - 6:57 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

25h 57m1 stop Denver Intl

8:00 pm - 4:56 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

19h 56m1 stop Denver Intl

$239Frontier

Mon, Sep 28 - Tue, Sep 29

5:20 pm - 9:21 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

5h 01m1 stop Chicago O'Hare Intl

1:09 pm - 4:25 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 16mnonstop

$247United Airlines

Wed, Sep 23 - Tue, Oct 6

8:20 am - 11:57 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

4h 37m1 stop Chicago O'Hare Intl

8:30 am - 11:46 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 16mnonstop

$247United Airlines

Sat, Dec 12 - Wed, Dec 30

11:30 am - 4:02 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

5h 32m1 stop Detroit Metropolitan Wayne County

6:00 am - 12:16 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

5h 16m1 stop Atlanta Hartsfield-Jackson

$257Delta

Sat, Oct 3 - Mon, Oct 5

11:15 am - 4:32 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

6h 17m1 stop Atlanta Hartsfield-Jackson

5:59 pm - 11:09 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

4h 10m1 stop Detroit Metropolitan Wayne County

$257Delta

Recent last minute flight deals from District of Columbia to St. Louis

Fri, Sep 4 - Sun, Oct 4

9:54 pm - 4:11 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

19h 17m1 stop Orlando

5:19 pm - 10:17 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

15h 58m1 stop Orlando

$291Frontier

Sun, Sep 6 - Wed, Sep 9

6:20 am - 5:22 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

12h 02m1 stop Atlanta Hartsfield-Jackson

12:17 pm - 6:20 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

17h 03m1 stop Las Vegas Harry Reid Intl

$300Frontier

Thu, Sep 3 - Tue, Oct 6

3:30 pm - 4:45 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 15mnonstop

7:55 pm - 10:55 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 00mnonstop

$390Southwest

Sun, Sep 6 - Wed, Sep 9

2:40 pm - 3:55 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 15mnonstop

7:10 pm - 10:10 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 00mnonstop

$393Southwest

Sat, Sep 5 - Wed, Sep 9

5:45 pm - 7:11 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 26mnonstop

8:40 am - 11:54 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 14mnonstop

$393United Airlines

Sun, Sep 6 - Wed, Sep 9

5:45 pm - 7:11 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 26mnonstop

8:40 am - 11:54 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 14mnonstop

$393United Airlines

Sat, Sep 5 - Wed, Sep 9

4:32 pm - 6:03 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 31mnonstop

5:13 pm - 8:19 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 06mnonstop

$439American Airlines

Sat, Sep 5 - Wed, Sep 9

4:32 pm - 6:03 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 31mnonstop

11:01 am - 4:24 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

4h 23m1 stop Chicago O'Hare Intl

$449American Airlines

Wed, Sep 2 - Wed, Sep 2

6:10 am - 9:37 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

4h 27m1 stop Detroit Metropolitan Wayne County

5:30 pm - 11:26 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

4h 56m1 stop Detroit Metropolitan Wayne County

$505Delta

Wed, Sep 2 - Mon, Sep 7

3:03 pm - 6:27 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

4h 24m1 stop Atlanta Hartsfield-Jackson

6:00 am - 11:33 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

4h 33m1 stop Atlanta Hartsfield-Jackson

$534Delta

Recent direct flight deals from District of Columbia to St. Louis

Thu, Oct 1 - Mon, Oct 5

2:54 pm - 4:27 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 33mnonstop

5:08 pm - 8:18 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 10mnonstop

$237American Airlines

Mon, Sep 21 - Thu, Sep 24

7:59 pm - 9:24 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 25mnonstop

6:00 am - 9:19 amSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 19mnonstop

$237American Airlines

Tue, Sep 22 - Wed, Sep 23

6:50 pm - 8:00 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 10mnonstop

8:25 am - 11:25 amSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 00mnonstop

$237Southwest

Wed, Sep 23 - Tue, Oct 6

12:00 pm - 1:15 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 15mnonstop

1:20 pm - 4:20 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 00mnonstop

$237Southwest

Mon, Sep 28 - Thu, Oct 1

2:54 pm - 4:27 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 33mnonstop

5:13 pm - 8:19 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 06mnonstop

$237American Airlines

Thu, Feb 4 - Mon, Feb 8

1:31 pm - 3:13 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 42mnonstop

10:42 am - 1:48 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 06mnonstop

$237American Airlines

Sat, Nov 14 - Mon, Nov 16

12:15 pm - 1:40 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 25mnonstop

4:00 pm - 6:55 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

1h 55mnonstop

$237Southwest

Thu, Oct 29 - Mon, Nov 2

8:40 am - 10:12 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 32mnonstop

8:00 am - 11:10 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 10mnonstop

$255United Airlines

Wed, Oct 28 - Thu, Oct 29

8:40 am - 10:12 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 32mnonstop

1:00 pm - 4:09 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 09mnonstop

$255United Airlines

Wed, Sep 23 - Tue, Oct 6

5:45 pm - 7:14 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 29mnonstop

8:30 am - 11:46 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 16mnonstop

$256United Airlines

Useful Info

Low season	January
High season	July
Cheapest flight	$126

Best time to beat the crowds with an average 6% drop in price.

Most popular time to fly with an average 9% increase in price.

Flight from Reagan Washington National Airport to St. Louis

How does KAYAK find such low prices on flights from District of Columbia 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 District of Columbia to St. Louis.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from District of Columbia to St. Louis?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from District of Columbia 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 District of Columbia 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 District of Columbia with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from District of Columbia 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 District of Columbia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Fenton

O'Fallon

Wentzville

Farmington

Eureka

Litchfield

Grafton

Shrewsbury

Glencoe

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

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St. Louis (STL)

STL

$126 Find Cheap Flights from District of Columbia to St. Louis - Compare and Save

Cheap Flights from District of Columbia to St. Louis

Recent round-trip flight deals from District of Columbia to St. Louis

Recent one-way flight deals from District of Columbia to St. Louis

Recent last minute flight deals from District of Columbia to St. Louis

Recent direct flight deals from District of Columbia to St. Louis

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

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

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Choose which airport to fly into in St. Louis