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.

$105 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

Sun, Dec 13 - Wed, Dec 16

10:35 pm - 11:17 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

13h 42m1 stop Atlanta Hartsfield-Jackson

12:02 pm - 6:51 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

17h 49m1 stop Atlanta Hartsfield-Jackson

$240Frontier

Tue, Dec 8 - Mon, Dec 14

6:00 pm - 11:04 amDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

18h 04m1 stop Denver Intl

7:54 pm - 4:55 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

20h 01m1 stop Denver Intl

$245Frontier

Wed, Dec 2 - Tue, Dec 8

8:30 am - 10:03 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 33mnonstop

1:17 pm - 4:22 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 05mnonstop

$259United Airlines

Wed, Dec 2 - Sat, Dec 5

8:30 am - 10:03 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 33mnonstop

8:30 am - 11:35 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 05mnonstop

$259United Airlines

Wed, Dec 2 - Tue, Dec 8

1:28 pm - 3:10 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 42mnonstop

3:41 pm - 6:47 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 06mnonstop

$259American Airlines

Tue, Dec 8 - Tue, Dec 15

8:20 am - 10:08 amDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 48mnonstop

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

2h 06mnonstop

$259American Airlines

Sat, Dec 12 - Sat, Dec 19

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

2h 25mnonstop

8:10 am - 11:05 amSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

1h 55mnonstop

$259Southwest

Sat, Jan 9 - Sat, Jan 16

12:00 pm - 1:30 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 30mnonstop

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

2h 00mnonstop

$259Southwest

Tue, Dec 1 - Tue, Dec 8

12:38 pm - 4:43 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

5h 05m1 stop Atlanta Hartsfield-Jackson

10:14 am - 4:23 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

5h 09m1 stop Detroit Metropolitan Wayne County

$279Delta

Sat, Jan 23 - Wed, Jan 27

7:17 am - 11:05 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

4h 48m1 stop Atlanta Hartsfield-Jackson

5:45 pm - 11:17 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

4h 32m1 stop Detroit Metropolitan Wayne County

$279Delta

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

Sat, Nov 14 - Sat, Nov 21

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

13h 00m1 stop Orlando

5:15 pm - 5:10 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

10h 55m1 stop Las Vegas Harry Reid Intl

$268Frontier

Sat, Nov 14 - Mon, Nov 16

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

13h 00m1 stop Orlando

4:26 pm - 10:21 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

16h 55m1 stop Orlando

$316Frontier

Fri, Nov 13 - Tue, Dec 15

8:05 am - 1:23 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

6h 18m1 stop Atlanta Hartsfield-Jackson

6:05 pm - 11:23 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

4h 18m1 stop Detroit Metropolitan Wayne County

$391Delta

Thu, Nov 12 - Tue, Dec 15

3:00 pm - 6:13 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

4h 13m1 stop Atlanta Hartsfield-Jackson

6:00 am - 11:43 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

4h 43m1 stop Atlanta Hartsfield-Jackson

$391Delta

Sat, Nov 14 - Mon, Nov 16

5:55 pm - 7:30 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 35mnonstop

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

2h 09mnonstop

$453United Airlines

Sat, Nov 14 - Sun, Nov 15

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

$453United Airlines

Tue, Nov 17 - Thu, Nov 19

3:55 pm - 9:51 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

6h 56m1 stop Charlotte Douglas

12:54 pm - 7:37 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

5h 43m1 stop Charlotte Douglas

$461American Airlines

Fri, Nov 13 - Tue, Dec 15

12:00 pm - 1:25 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

$471Southwest

Wed, Nov 18 - Sat, Nov 21

1:44 pm - 3:21 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 37mnonstop

7:02 am - 10:08 amSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 06mnonstop

$474American Airlines

Fri, Nov 13 - Tue, Dec 15

12:00 pm - 1:25 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 25mnonstop

4:30 pm - 10:00 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

4h 30m1 stop Nashville Intl

$481Southwest

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

Wed, Dec 2 - Tue, Dec 8

8:30 am - 10:03 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 33mnonstop

1:17 pm - 4:22 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 05mnonstop

$259United Airlines

Wed, Dec 2 - Sat, Dec 5

8:30 am - 10:03 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 33mnonstop

8:30 am - 11:35 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 05mnonstop

$259United Airlines

Wed, Dec 2 - Tue, Dec 8

1:28 pm - 3:10 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 42mnonstop

3:41 pm - 6:47 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 06mnonstop

$259American Airlines

Tue, Dec 8 - Tue, Dec 15

8:20 am - 10:08 amDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 48mnonstop

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

2h 06mnonstop

$259American Airlines

Sat, Dec 12 - Sat, Dec 19

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

2h 25mnonstop

8:10 am - 11:05 amSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

1h 55mnonstop

$259Southwest

Sat, Jan 9 - Sat, Jan 16

12:00 pm - 1:30 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 30mnonstop

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

2h 00mnonstop

$259Southwest

Tue, Dec 1 - Tue, Dec 8

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

2h 40mnonstop

6:48 am - 10:00 amSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 12mnonstop

$259American Airlines

Wed, Jan 20 - Tue, Jan 26

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

2h 30mnonstop

7:40 pm - 10:45 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 05mnonstop

$259Southwest

Tue, Jan 12 - Sat, Jan 16

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

$269United Airlines

Wed, Dec 2 - Tue, Dec 8

5:55 pm - 7:30 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 35mnonstop

8:30 am - 11:35 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 05mnonstop

$269United Airlines

Useful Info

Low season	January
High season	July
Cheapest flight	$105

Best time to beat the crowds with an average 7% 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.