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.

$47 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

Tue, Nov 24 - Mon, Nov 30

10:47 pm - 5:40 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

19h 53m1 stop Atlanta Hartsfield-Jackson

6:35 pm - 11:11 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

15h 36m1 stop Atlanta Hartsfield-Jackson

$239Frontier

Thu, Oct 15 - Mon, Oct 19

11:12 am - 11:13 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

13h 01m1 stop Orlando

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

4h 46m1 stop Atlanta Hartsfield-Jackson

$240Frontier

Mon, Oct 26 - Tue, Oct 27

3:25 pm - 4:55 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 30mnonstop

10:20 am - 2:30 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

3h 10m1 stop Columbus

$243Southwest

Thu, Oct 22 - Tue, Oct 27

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

2h 25mnonstop

10:20 am - 2:30 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

3h 10m1 stop Columbus

$243Southwest

Wed, Oct 28 - Wed, Nov 4

8:35 pm - 12:19 amDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

4h 44m1 stop Chicago O'Hare Intl

7:00 am - 10:08 amSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 08mnonstop

$247American Airlines

Wed, Oct 21 - Thu, Oct 22

3:15 pm - 7:18 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

5h 03m1 stop Charlotte Douglas

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

2h 12mnonstop

$247American Airlines

Tue, Nov 10 - Wed, Nov 11

8:23 am - 12:10 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

4h 47m1 stop Chicago O'Hare Intl

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

2h 10mnonstop

$247United Airlines

Tue, Oct 27 - Tue, Nov 3

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

Mon, Oct 19 - Thu, Oct 22

7:50 am - 5:40 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

10h 50m1 stop Atlanta Hartsfield-Jackson

4:30 pm - 5:56 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

24h 26m2 stops Orlando Blountville Tri Cities TN/VA

$256Multiple Airlines

Wed, Nov 18 - Sat, Nov 21

11:16 am - 11:19 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

25h 03m3 stops Orlando Atlanta Hartsfield-Jackson Dallas/Fort Worth

3:04 pm - 11:46 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

19h 42m2 stops Denver Intl Minneapolis St Paul

$313Multiple Airlines

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

Sat, Oct 3 - Wed, Oct 7

1:06 pm - 7:17 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

7h 11m1 stop Denver Intl

8:10 pm - 12:04 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

14h 54m1 stop Denver Intl

$362Frontier

Sat, Oct 3 - Wed, Oct 7

6:00 am - 11:17 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

30h 17m1 stop Las Vegas Harry Reid Intl

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

17h 03m1 stop Las Vegas Harry Reid Intl

$362Frontier

Mon, Oct 5 - Wed, Oct 7

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

2h 25mnonstop

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

2h 00mnonstop

$498Southwest

Tue, Oct 6 - Tue, Oct 6

8:20 am - 9:41 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 21mnonstop

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

2h 16mnonstop

$500United Airlines

Tue, Oct 6 - Tue, Oct 6

8:20 am - 9:41 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 21mnonstop

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

2h 16mnonstop

$500United Airlines

Mon, Oct 5 - Wed, Oct 7

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

2h 25mnonstop

10:20 am - 2:30 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

3h 10m1 stop Columbus

$504Southwest

Sat, Oct 3 - Tue, Oct 6

4:15 pm - 5:39 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 24mnonstop

1:20 pm - 4:30 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 10mnonstop

$505American Airlines

Tue, Oct 6 - Wed, Oct 7

11:10 am - 12:46 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

$505American Airlines

Mon, Oct 5 - Sat, Oct 10

11:10 am - 5:10 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

7h 00m1 stop Detroit Metropolitan Wayne County

6:47 am - 11:34 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

3h 47m1 stop Detroit Metropolitan Wayne County

$554Delta

Mon, Oct 5 - Tue, Oct 6

5:15 pm - 8:35 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

4h 20m1 stop Detroit Metropolitan Wayne County

6:05 pm - 11:16 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

4h 11m1 stop Detroit Metropolitan Wayne County

$554Delta

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

Thu, Feb 4 - Mon, Feb 8

8:20 am - 9:48 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 28mnonstop

8:25 am - 11:31 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 06mnonstop

$251United Airlines

Wed, Nov 11 - Wed, Nov 11

8:11 am - 9:55 amDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 44mnonstop

3:51 pm - 6:54 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 03mnonstop

$254American Airlines

Thu, Nov 5 - Mon, Nov 9

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

2h 30mnonstop

7:55 pm - 10:50 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

1h 55mnonstop

$255Southwest

Thu, Feb 4 - Mon, Feb 8

1:38 pm - 3:17 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 39mnonstop

10:42 am - 1:44 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 02mnonstop

$255American Airlines

Wed, Feb 24 - Sat, Feb 27

7:50 pm - 9:31 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 41mnonstop

9:46 am - 12:59 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 13mnonstop

$255American Airlines

Thu, Jan 28 - Mon, Feb 1

8:20 am - 9:48 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 28mnonstop

8:25 am - 11:31 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 06mnonstop

$256United Airlines

Fri, Oct 30 - Mon, Nov 2

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

2h 25mnonstop

7:55 pm - 10:50 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

1h 55mnonstop

$266Southwest

Wed, Oct 28 - Fri, Oct 30

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

2h 32mnonstop

10:48 am - 1:59 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 11mnonstop

$266American Airlines

Sat, Oct 31 - Mon, Nov 2

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

$280United Airlines

Fri, Oct 30 - 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

$292United Airlines

Useful Info

Low season	January
High season	July
Cheapest flight	$47

Best time to beat the crowds with an average 10% drop in price.

Most popular time to fly with an average 8% 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.