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

Depart
Return
1 adult
Adults
18-64
Seniors
65+
Youth
12-17
Child
2-11
Seat Infant
under 2
Lap Infant
under 2
The price shown for each flight will be the average for all passengers including any infants.
Compare vs. KAYAK all | none

Best fares from IAD to STL

Sun Mon Tue Wed Thu Fri Sat
  1 $275 2 $245 3 $314 4 $115 5 $410 6 $82
7 $282 8 $354 9 $115 10 $280 11 $115 12 $286 13 $115
14 $285 15 $160 16 $145 17 $289 18 $125 19 $297 20 $261
21 $135 22 $289 23 $265 24 $322 25 $175 26 $294 27 $294
28 $175 29 $251 30 $235 31 $248      

Best fares found by others...

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 8:05 am 9:28 am Dec 28 - Dec 28
3420 8:05 am 9:28 am Jan 4 - Jan 4
3420 8:05 am 9:28 am Dec 21 - Dec 21
3420 8:06 am 9:29 am Dec 9 - Dec 16
3420 8:06 am 9:29 am Dec 4 - Dec 15
3420 8:06 am 9:29 am Dec 10 - Dec 17
3420 8:06 am 9:29 am Dec 7 - Dec 14
6118 8:06 am 9:29 am Dec 6 - Dec 13
3420 8:10 am 9:33 am Dec 20 - Jan 3
3420 8:10 am 9:33 am Dec 30 - Dec 30
3420 8:10 am 9:33 am Dec 19 - Jan 2
3420 8:10 am 9:33 am Dec 23 - Dec 23
3420 8:10 am 9:33 am Dec 22 - Dec 29
4566 8:10 am 9:33 am Dec 18 - Dec 18
3357 12:21 pm 1:43 pm Jan 4 - Jan 4
3357 12:21 pm 1:43 pm Dec 21 - Dec 28
4264 12:21 pm 1:43 pm Jan 1 - Jan 1
4264 12:21 pm 1:43 pm Dec 29 - Jan 2
5682 12:21 pm 1:43 pm Dec 24 - Dec 24
5804 12:21 pm 1:43 pm Dec 18 - Dec 23
5804 12:21 pm 1:43 pm Dec 26 - Dec 26
3357 12:34 pm 1:57 pm Dec 16 - Dec 17
3357 12:34 pm 1:57 pm Dec 3 - Dec 9
3357 12:34 pm 1:57 pm Dec 10 - Dec 10
4566 12:34 pm 1:57 pm Dec 15 - Dec 15
4566 12:34 pm 1:57 pm Dec 11 - Dec 12
4566 12:34 pm 1:57 pm Dec 4 - Dec 8
5808 12:34 pm 1:57 pm Dec 7 - Dec 14
3357 5:00 pm 6:19 pm Dec 24 - Dec 24
3434 5:00 pm 6:19 pm Dec 25 - Dec 25
3434 5:00 pm 6:19 pm Dec 23 - Dec 23
3434 5:00 pm 6:19 pm Jan 4 - Jan 4
3434 5:00 pm 6:19 pm Dec 31 - Dec 31
3434 5:00 pm 6:19 pm Dec 30 - Dec 30
3434 5:00 pm 6:19 pm Dec 26 - Jan 2
3434 5:00 pm 6:19 pm Dec 18 - Dec 22
4086 5:00 pm 6:19 pm Dec 20 - Dec 27
4121 5:00 pm 6:19 pm Jan 3 - Jan 3
6112 5:00 pm 6:19 pm Dec 21 - Dec 28
3354 5:30 pm 6:53 pm Dec 9 - Dec 16
3395 5:30 pm 6:53 pm Dec 4 - Dec 11
3395 5:30 pm 6:53 pm Dec 12 - Dec 14
3395 5:30 pm 6:53 pm Dec 8 - Dec 15
3395 5:30 pm 6:53 pm Dec 5 - Dec 5
3434 5:30 pm 6:53 pm Dec 3 - Dec 17
3434 5:30 pm 6:53 pm Dec 6 - Dec 13
3427 9:52 pm 11:14 pm Dec 23 - Dec 30
3427 9:52 pm 11:14 pm Jan 1 - Jan 1
3427 9:52 pm 11:14 pm Dec 18 - Dec 21
3427 9:52 pm 11:14 pm Dec 25 - Dec 25
3427 9:52 pm 11:14 pm Dec 22 - Jan 4
3427 9:55 pm 11:18 pm Dec 8 - Dec 15
3427 9:55 pm 11:18 pm Dec 9 - Dec 17
3427 9:55 pm 11:18 pm Dec 3 - Dec 7
3427 9:55 pm 11:18 pm Dec 11 - Dec 14
3427 10:00 pm 11:22 pm Dec 20 - Jan 3
3427 10:00 pm 11:23 pm Dec 6 - Dec 13