Find Deals on Flights from Washington Dulles Intl to Lambert-St Louis (IAD - STL)

Depart
Return
1 adult
Adults
18-64
Seniors
65+
Youths
12-17
Children
2-11
Seat Infants
under 2
Lap Infants
under 2
The price shown for each flight will be the average for all passengers including any infants.
Compare vs. KAYAK all | none
Browse Origins:
Browse Destinations:

Dates flexible? Here are the best fares found in the past 48 hours...

Book cheap flights from Washington Dulles Intl to Lambert-St Louis

(Round-trip)
Depart: Tue Aug 23 2016 Return: Wed Aug 24 2016 Trip spans 2 days
Depart: Fri Oct 14 2016 Return: Sun Oct 16 2016 Trip spans 3 days
Depart: Wed Aug 24 2016 Return: Mon Aug 29 2016 Trip spans 6 days
Depart: Sat Aug 27 2016 Return: Tue Aug 30 2016 Trip spans 4 days
Depart: Mon Aug 29 2016 Return: Wed Aug 31 2016 Trip spans 3 days
Depart: Tue Aug 30 2016 Return: Sat Sep 3 2016 Trip spans 5 days
Depart: Wed Aug 31 2016 Return: Sat Sep 3 2016 Trip spans 4 days
Depart: Thu Sep 1 2016 Return: Sat Sep 3 2016 Trip spans 3 days
Depart: Tue Nov 22 2016 Return: Fri Nov 25 2016 Trip spans 4 days
Depart: Sat Sep 3 2016 Return: Wed Sep 7 2016 Trip spans 5 days
Depart: Sun Dec 25 2016 Return: Mon Jan 2 2017 Trip spans 9 days
Depart: Sun Sep 4 2016 Return: Wed Sep 7 2016 Trip spans 4 days
Depart: Thu Dec 29 2016 Return: Mon Jan 2 2017 Trip spans 5 days
Depart: Wed Sep 7 2016 Return: Thu Sep 8 2016 Trip spans 2 days
Depart: Mon Aug 15 2016 Return: Thu Aug 18 2016 Trip spans 4 days
Depart: Thu Sep 8 2016 Return: Sat Sep 10 2016 Trip spans 3 days
Depart: Sat Sep 10 2016 Return: Mon Sep 12 2016 Trip spans 3 days
Depart: Tue Sep 13 2016 Return: Wed Sep 14 2016 Trip spans 2 days
Depart: Wed Sep 14 2016 Return: Sat Sep 17 2016 Trip spans 4 days
Depart: Sun Jul 31 2016 Return: Sat Aug 6 2016 Trip spans 7 days
Direct flights IAD to STL on United
Flight # Depart IAD Arrive STL Sun Mon Tue Wed Thu Fri Sat Valid Between
4614 8:25 am 9:44 am Jul 21 - Aug 15
4614 8:30 am 9:50 am Aug 16 - Sep 6
4614 8:30 am 9:50 am Aug 21 - Aug 28
4614 8:50 am 10:10 am Aug 20 - Aug 27
6343 12:30 pm 1:50 pm Aug 21 - Aug 28
4526 12:31 pm 1:50 pm Jul 21 - Aug 15
6097 12:31 pm 1:50 pm Jul 24 - Aug 14
6343 12:35 pm 1:55 pm Aug 16 - Sep 2
4535 5:05 pm 6:25 pm Aug 16 - Sep 3
4535 5:05 pm 6:24 pm Jul 21 - Aug 15
4535 5:10 pm 6:30 pm Aug 21 - Aug 28
4535 5:15 pm 6:32 pm Jul 24 - Aug 14
4546 10:01 pm 11:16 pm Aug 20 - Aug 27
4546 10:05 pm 11:23 pm Jul 23 - Aug 14
4546 10:07 pm 11:22 pm Aug 16 - Sep 6
4546 10:07 pm 11:22 pm Aug 21 - Aug 28
4546 10:10 pm 11:28 pm Jul 21 - Aug 15
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

We attempt to get accurate prices, however, prices are not guaranteed.

Here's why:

We’re not the seller.
At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

We compile tonnes of data for you
Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.

If you have more questions or if you have a bad price to report to us,
please send us an email and someone from our team will get back to you promptly.

Airports
Origin

Washington
$203
Destination

St. Louis
$203
Airlines Airline reviews

7 travelers who booked a flight from Washington to St. Louis rated their chosen airlines with an average of 6.9.

Overall
6.9
Boarding
7.1
Crew
8.0
Comfort
6.6
Food
6.6
Entertainment
4.9