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.

$51 CHEAP FLIGHTS from District of Columbia to St. Louis

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Cheap Flights from District of Columbia to St. Louis

Cheap flights from District of Columbia to St. Louis with top airlines, updated regularly. Compare round-trip, one-way, direct and last-minute deals.

Round-trip

One-way

Last minute

Direct

Mon, Nov 9 - Mon, Nov 16

7:32 am - 11:16 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

16h 44m2 stops Atlanta Hartsfield-Jackson Orlando

4:26 pm - 11:43 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

30h 17m2 stops Orlando Atlanta Hartsfield-Jackson

$240Frontier

Tue, Dec 1 - Thu, Dec 3

10:33 pm - 12:12 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

26h 39m2 stops Atlanta Hartsfield-Jackson Orlando

6:13 pm - 5:45 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

22h 32m2 stops Orlando Atlanta Hartsfield-Jackson

$241Frontier

Fri, Nov 6 - Sat, Nov 7

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

2h 35mnonstop

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

2h 10mnonstop

$244United Airlines

Thu, Nov 26 - Fri, Nov 27

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

2h 32mnonstop

6:50 pm - 12:30 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

4h 40m1 stop Chicago O'Hare Intl

$247United Airlines

Wed, Dec 23 - Fri, Jan 1

9:31 am - 3:51 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

7h 20m1 stop Chicago O'Hare Intl

10:27 am - 1:29 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 02mnonstop

$247American Airlines

Mon, Nov 2 - Mon, Nov 9

8:03 pm - 9:38 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 35mnonstop

5:05 am - 10:55 amSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

4h 50m1 stop Chicago O'Hare Intl

$247American Airlines

Thu, Nov 12 - Thu, Nov 19

6:30 pm - 10:50 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

5h 20m1 stop Chicago Midway

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

1h 55mnonstop

$247Southwest

Fri, Dec 18 - Fri, Dec 25

6:00 am - 1:00 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

8h 00m1 stop Houston Hobby

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

1h 55mnonstop

$247Southwest

Tue, Nov 10 - Wed, Jan 13

12:32 pm - 4:43 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

5h 11m1 stop Atlanta Hartsfield-Jackson

11:51 am - 6:26 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

5h 35m1 stop Atlanta Hartsfield-Jackson

$257Delta

Mon, Nov 9 - Thu, Jan 14

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

4h 13m1 stop Atlanta Hartsfield-Jackson

5:45 pm - 11:02 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

4h 17m1 stop Detroit Metropolitan Wayne County

$257Delta

Sat, Oct 17 - Wed, Oct 21

6:00 am - 11:31 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

30h 31m1 stop Las Vegas Harry Reid Intl

6:35 pm - 12:21 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

4h 46m1 stop Atlanta Hartsfield-Jackson

$362Frontier

Sat, Oct 17 - Wed, Oct 21

1:00 pm - 6:57 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

6h 57m1 stop Denver Intl

4:19 pm - 9:59 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

28h 40m1 stop Denver Intl

$362Frontier

Tue, Oct 20 - Tue, Nov 3

5:55 pm - 7:21 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 26mnonstop

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

2h 10mnonstop

$381United Airlines

Tue, Oct 20 - Tue, Nov 3

5:55 pm - 7:21 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 26mnonstop

10:53 am - 5:24 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

5h 31m1 stop Chicago O'Hare Intl

$391United Airlines

Tue, Oct 20 - Tue, Nov 3

12:27 pm - 4:28 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

5h 01m1 stop Atlanta Hartsfield-Jackson

6:00 am - 2:09 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

7h 09m1 stop Atlanta Hartsfield-Jackson

$401Delta

Mon, Oct 19 - Wed, Oct 21

6:15 am - 12:09 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

6h 54m1 stop Charlotte Douglas

12:49 pm - 6:45 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

4h 56m1 stop Charlotte Douglas

$461American Airlines

Mon, Oct 19 - Thu, Oct 22

7:15 pm - 11:59 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

5h 44m1 stop Charlotte Douglas

7:16 am - 12:51 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

4h 35m1 stop Charlotte Douglas

$461American Airlines

Tue, Oct 20 - Wed, Oct 21

3:05 pm - 4:30 pmDCA 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

$487Southwest

Tue, Oct 20 - Wed, Oct 21

12:20 pm - 1:45 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 25mnonstop

4:30 pm - 9:55 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

4h 25m1 stop Nashville Intl

$496Southwest

Tue, Oct 20 - Sat, Oct 24

5:13 pm - 8:51 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

4h 38m1 stop Detroit Metropolitan Wayne County

6:00 am - 2:08 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

7h 08m1 stop Atlanta Hartsfield-Jackson

$525Delta

Fri, Nov 6 - Sat, Nov 7

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

2h 35mnonstop

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

2h 10mnonstop

$244United Airlines

Mon, Nov 9 - 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

$261United Airlines

Thu, Nov 19 - Sun, Nov 22

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

2h 40mnonstop

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

2h 06mnonstop

$266American Airlines

Thu, Nov 19 - Sun, Nov 22

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

2h 40mnonstop

6:43 am - 9:54 amSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 11mnonstop

$266American Airlines

Fri, Dec 18 - Sun, Dec 20

2:55 pm - 4:25 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 30mnonstop

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

1h 55mnonstop

$266Southwest

Fri, Jan 15 - Mon, Jan 18

2:45 pm - 4:15 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 30mnonstop

3:45 pm - 6:40 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

1h 55mnonstop

$266Southwest

Thu, Jan 14 - Mon, Jan 18

8:28 pm - 10:06 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 38mnonstop

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

2h 12mnonstop

$266American Airlines

Fri, Dec 18 - Sun, Dec 20

2:55 pm - 4:25 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 30mnonstop

1:05 pm - 4:00 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

1h 55mnonstop

$266Southwest

Tue, Nov 3 - Thu, Nov 5

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

$280United Airlines

Fri, Nov 6 - Tue, Nov 10

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

2h 35mnonstop

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

2h 10mnonstop

$287United Airlines

Low season	January
High season	July
Cheapest flight	$51

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.