SEARCH ONE AND DONE. - Compare hundreds of travel sites at once.
Choose where to book.
Find deals from over 400 airlines worldwide.

Cheap Flights from Washington to St Louis (IAD - STL)

DepartReturn
1 adult
Note: some airlines charge for infants in laps.
The price shown for each flight will be the average for all passengers including any infants.
Choose Sites to Compare vs. KAYAK

Best fares from IAD to STL (Found by others)

Sun Mon Tue Wed Thu Fri Sat
          1 $538 2 $388
3 $398 4 $402 5 $352 6 $460 7 $402 8 $480 9 $392
10 $477 11 $336 12 $319 13 $313 14 $323 15 $334 16 $343
17 $355 18 $343 19 $313 20 $313 21 $293 22 $301 23 $293
24 $301 25 $293 26 $293 27 $293 28 $293 29 $321 30 $287
31 $300            
KAYAK searches hundreds of sites to find the best rate for your next flight from Washington to St Louis. Get the best flight deal for your St Louis trip!
Here's how it works. Search KAYAK for a flight ticket from Washington to St Louis. Sort, filter and compare results on one web page. Then book your plane ticket direct on the airline or travel agent site of your choice!
Direct flights IAD to STL on United
Flight # Depart IAD Arrive STL Sun Mon Tue Wed Thu Fri Sat Valid Between
3420 8:25 am 9:37 am Aug 24 - Aug 24
3420 8:30 am 9:41 am Aug 3 - Aug 17
3420 8:30 am 9:41 am Aug 2 - Aug 16
3646 8:30 am 9:37 am Aug 12 - Aug 15
3646 8:30 am 9:37 am Aug 11 - Aug 18
3420 8:43 am 9:55 am Sep 6 - Sep 13
3420 8:43 am 9:55 am Sep 8 - Sep 19
3420 8:43 am 9:55 am Sep 4 - Sep 4
3420 8:43 am 9:55 am Aug 19 - Sep 2
3420 8:43 am 9:55 am Aug 23 - Aug 23
3420 8:43 am 9:55 am Sep 5 - Sep 5
3420 8:43 am 9:55 am Sep 3 - Sep 17
4665 9:18 am 10:30 am Aug 30 - Aug 30
3357 12:20 pm 1:32 pm Sep 5 - Sep 5
3357 12:20 pm 1:32 pm Aug 19 - Aug 26
3357 12:20 pm 1:32 pm Aug 20 - Aug 25
3357 12:20 pm 1:32 pm Sep 4 - Sep 4
3357 12:20 pm 1:32 pm Aug 31 - Aug 31
3357 12:20 pm 1:32 pm Aug 27 - Sep 3
5907 12:20 pm 1:32 pm Aug 23 - Aug 30
3357 12:21 pm 1:33 pm Sep 7 - Sep 14
3357 12:21 pm 1:33 pm Sep 8 - Sep 16
4129 12:21 pm 1:33 pm Sep 6 - Sep 13
3357 12:23 pm 1:34 pm Jul 31 - Aug 14
3357 12:23 pm 1:34 pm Aug 1 - Aug 18
4308 12:23 pm 1:34 pm Aug 3 - Aug 17
3605 4:55 pm 6:10 pm Aug 12 - Aug 14
3605 4:55 pm 6:10 pm Aug 8 - Aug 18
3434 5:00 pm 6:12 pm Sep 5 - Sep 17
3434 5:00 pm 6:12 pm Sep 2 - Sep 2
3434 5:00 pm 6:12 pm Sep 3 - Sep 3
3434 5:00 pm 6:12 pm Aug 19 - Sep 1
3605 5:00 pm 6:08 pm Sep 4 - Sep 4
3434 5:01 pm 6:20 pm Aug 10 - Aug 17
3434 5:04 pm 6:16 pm Sep 7 - Sep 14
3434 5:04 pm 6:16 pm Aug 24 - Aug 24
3434 5:04 pm 6:16 pm Aug 31 - Aug 31
3434 5:09 pm 6:21 pm Aug 23 - Sep 13
3434 5:09 pm 6:28 pm Aug 9 - Aug 16
3427 9:50 pm 10:58 pm Aug 3 - Aug 17
3427 9:50 pm 10:56 pm Sep 7 - Sep 21
3427 9:50 pm 10:56 pm Aug 23 - Aug 30
3646 9:50 pm 10:52 pm Sep 6 - Sep 6
3427 9:55 pm 11:03 pm Aug 9 - Aug 16
3427 9:57 pm 11:03 pm Aug 19 - Sep 19
3427 9:57 pm 11:05 pm Aug 8 - Aug 15
3427 9:57 pm 11:03 pm Aug 20 - Sep 17
3427 9:57 pm 11:05 pm Aug 11 - Aug 18