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.

$49 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

Fri, Jan 1 - Wed, Jan 6

7:55 pm - 9:30 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 35mnonstop

3:47 pm - 6:51 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 04mnonstop

$239American Airlines

Mon, Dec 7 - Fri, Dec 11

1:29 pm - 3:11 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 42mnonstop

10:38 am - 1:44 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 06mnonstop

$239American Airlines

Sat, Nov 14 - Thu, Nov 19

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

2h 25mnonstop

8:40 am - 11:35 amSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

1h 55mnonstop

$239Southwest

Tue, Nov 10 - Wed, Nov 11

2:40 pm - 4:05 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 25mnonstop

1:25 pm - 4:20 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

1h 55mnonstop

$239Southwest

Fri, Nov 20 - Sun, Nov 22

6:50 am - 5:40 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

11h 50m1 stop Atlanta Hartsfield-Jackson

9:09 am - 9:01 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

10h 52m1 stop Dallas/Fort Worth

$240Frontier

Tue, Dec 22 - Tue, Dec 29

10:06 pm - 12:41 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

27h 35m1 stop Orlando

5:58 pm - 9:11 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

26h 13m1 stop Orlando

$240Frontier

Mon, Nov 9 - Thu, Nov 12

3:37 pm - 9:40 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

7h 03m1 stop Chicago O'Hare Intl

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

2h 10mnonstop

$241United Airlines

Thu, Nov 26 - Tue, Dec 1

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

2h 32mnonstop

6:30 am - 11:53 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

4h 23m1 stop Chicago O'Hare Intl

$249United Airlines

Tue, Nov 10 - Wed, Nov 11

5:16 pm - 8:29 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

4h 13m1 stop Detroit Metropolitan Wayne County

5:48 pm - 12:41 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

5h 53m1 stop Atlanta Hartsfield-Jackson

$259Delta

Fri, Dec 18 - Fri, Dec 25

6:00 am - 9:38 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

4h 38m1 stop Detroit Metropolitan Wayne County

6:20 am - 11:56 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

4h 36m1 stop Detroit Metropolitan Wayne County

$259Delta

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

Wed, Oct 28 - Sat, Oct 31

7:00 am - 3:23 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

9h 23m1 stop Denver Intl

7:59 pm - 1:09 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

16h 10m1 stop Denver Intl

$306Frontier

Wed, Oct 28 - Sat, Oct 31

7:00 am - 3:23 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

9h 23m1 stop Denver Intl

7:59 pm - 1:09 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

16h 10m1 stop Denver Intl

$306Frontier

Thu, Oct 29 - Thu, Nov 12

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

$411United Airlines

Thu, Oct 29 - Thu, Nov 12

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

2h 32mnonstop

9:59 am - 4:35 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

5h 36m1 stop Newark

$421United Airlines

Wed, Oct 28 - Wed, Oct 28

10:59 am - 12:35 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 36mnonstop

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

2h 10mnonstop

$465American Airlines

Wed, Oct 28 - Sat, Oct 31

2:25 pm - 3:57 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 32mnonstop

7:03 am - 10:15 amSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 12mnonstop

$473American Airlines

Thu, Oct 29 - Mon, Nov 2

11:16 am - 11:16 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

13h 00m1 stop Orlando

2:00 pm - 10:21 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

19h 21m3 stops Jonesboro Nashville Intl Orlando

$496Multiple Airlines

Tue, Oct 27 - Wed, Oct 28

6:40 pm - 8:10 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 30mnonstop

8:05 am - 11:00 amSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

1h 55mnonstop

$525Southwest

Wed, Oct 28 - Wed, Oct 28

8:00 am - 9:25 amDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 25mnonstop

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

2h 00mnonstop

$525Southwest

Sun, Oct 25 - Mon, Oct 26

6:00 am - 12:35 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

31h 35m1 stop Las Vegas Harry Reid Intl

5:53 pm - 12:45 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

17h 52m2 stops Dallas/Fort Worth Minneapolis St Paul

$570Multiple Airlines

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

Tue, Feb 16 - Thu, Feb 18

8:16 am - 10:00 amDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 44mnonstop

10:36 am - 1:43 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 07mnonstop

$239American Airlines

Tue, Nov 10 - Tue, Nov 17

8:19 am - 10:03 amDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 44mnonstop

10:33 am - 1:37 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 04mnonstop

$239American Airlines

Tue, Nov 10 - Wed, Nov 11

2:40 pm - 4:05 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 25mnonstop

1:25 pm - 4:20 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

1h 55mnonstop

$239Southwest

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

$239Southwest

Mon, Dec 7 - Fri, Dec 11

1:29 pm - 3:11 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 42mnonstop

10:38 am - 1:44 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 06mnonstop

$239American Airlines

Thu, Nov 19 - Fri, Nov 27

1:39 pm - 3:19 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 40mnonstop

6:53 am - 10:04 amSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 11mnonstop

$239American Airlines

Fri, Nov 13 - Mon, Nov 16

8:25 am - 9:55 amDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 30mnonstop

8:40 am - 11:35 amSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

1h 55mnonstop

$239Southwest

Thu, Nov 12 - Mon, Nov 16

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

$252United Airlines

Fri, Jan 1 - Wed, Jan 6

8:32 am - 10:05 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 33mnonstop

8:30 am - 11:37 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 07mnonstop

$252United Airlines

Fri, Jan 22 - Sun, Jan 24

8:35 am - 10:08 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 33mnonstop

8:30 am - 11:37 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 07mnonstop

$265United Airlines

Useful Info

Low season	January
High season	July
Cheapest flight	$49

Best time to beat the crowds with an average 9% drop in price.

Most popular time to fly with an average 5% increase in price.

Flight from Washington Dulles 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.