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

Depart
Return
1 adult
Cabin Economy
Adults
18-64
Seniors
65+
Youths
12-17
Children
2-11
Seat Infants
under 2
Lap Infants
under 2
Close
The price shown for each flight will be the average for all passengers including any infants.
Show flexible dates
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 Lambert-St Louis to Washington Dulles Intl

(Round-trip)
Depart: Tue Oct 17 2017 Return: Sat Oct 21 2017 Trip spans 5 days
$203
Select
United
United
STL
12:00a
→
IAD
2:00a
2h 00m
nonstop
IAD
12:00a
→
STL
2:14a
2h 14m
nonstop
Show reviews
7.0 Good (47,809 reviews)
Depart: Wed Oct 18 2017 Return: Sat Oct 21 2017 Trip spans 4 days
$210
Select
Multiple Airlines
Multiple Airlines
STL
12:00a
→
IAD
6:05a
6h 05m
1 stop
IAD
12:00a
→
STL
2:14a
2h 14m
nonstop
Depart: Wed Oct 25 2017 Return: Thu Nov 2 2017 Trip spans 9 days
$203
Select
United
United
STL
12:00a
→
IAD
2:03a
2h 03m
nonstop
IAD
12:00a
→
STL
2:29a
2h 29m
nonstop
Show reviews
7.0 Good (47,809 reviews)
Depart: Wed Sep 27 2017 Return: Mon Oct 16 2017 Trip spans 20 days
$408
Select
Frontier
Frontier
STL
12:00a
→
IAD
2:31p
14h 31m
1 stop
IAD
12:00a
→
STL
3:28p
15h 28m
1 stop
Show reviews
5.6 Okay (32,209 reviews)
Depart: Sat Nov 4 2017 Return: Mon Nov 6 2017 Trip spans 3 days
$203
Select
United
United
STL
12:00a
→
IAD
1:59a
1h 59m
nonstop
IAD
12:00a
→
STL
2:22a
2h 22m
nonstop
Show reviews
7.0 Good (47,809 reviews)
Depart: Sat Nov 4 2017 Return: Mon Nov 6 2017 Trip spans 3 days
$203
Select
United
United
STL
12:00a
→
IAD
1:59a
1h 59m
nonstop
IAD
12:00a
→
STL
2:22a
2h 22m
nonstop
Show ratings
7.0 Good (47,809 reviews)
Depart: Mon Dec 4 2017 Return: Wed Dec 6 2017 Trip spans 3 days
$203
Select
United
United
STL
12:00a
→
IAD
2:01a
2h 01m
nonstop
IAD
12:00a
→
STL
2:25a
2h 25m
nonstop
Depart: Tue Dec 19 2017 Return: Thu Dec 28 2017 Trip spans 10 days
$203
Select
United
United
STL
12:00a
→
IAD
1:59a
1h 59m
nonstop
IAD
12:00a
→
STL
2:29a
2h 29m
nonstop
Depart: Tue Jan 23 2018 Return: Sat Jan 27 2018 Trip spans 5 days
$203
Select
United
United
STL
12:00a
→
IAD
1:58a
1h 58m
nonstop
IAD
12:00a
→
STL
2:15a
2h 15m
nonstop
Depart: Thu Dec 21 2017 Return: Tue Dec 26 2017 Trip spans 6 days
$269
Select
United
United
STL
12:00a
→
IAD
7:04a
7h 04m
1 stop
IAD
12:00a
→
STL
2:24a
2h 24m
nonstop
Depart: Thu Sep 28 2017 Return: Tue Oct 3 2017 Trip spans 6 days
$611
Select
United
United
STL
12:00a
→
IAD
2:02a
2h 02m
nonstop
IAD
12:00a
→
STL
2:17a
2h 17m
nonstop
Select an airline:  United
Direct flights STL to IAD on United
Flight # Depart STL Arrive IAD Sun Mon Tue Wed Thu Fri Sat Valid Between
4606 8:30 am 11:33 am ✈ Oct 7 - Oct 14
4606 8:30 am 11:33 am ✈ Oct 8 - Oct 15
4606 8:30 am 11:33 am ✈ Oct 21 - Oct 28
4606 8:30 am 11:33 am ✈ Oct 22 - Oct 22
4606 8:30 am 11:31 am ✈ ✈ ✈ ✈ ✈ Oct 29 - Nov 3
4719 8:30 am 11:33 am ✈ Sep 10 - Oct 1
4888 8:30 am 11:33 am ✈ ✈ ✈ ✈ ✈ Oct 16 - Oct 27
4888 8:30 am 11:33 am ✈ Sep 16 - Sep 30
4888 8:30 am 11:33 am ✈ ✈ ✈ ✈ ✈ Sep 7 - Oct 13
4896 11:57 am 2:59 pm ✈ Oct 20 - Oct 27
4896 11:57 am 2:59 pm ✈ ✈ Oct 19 - Oct 26
4896 11:57 am 2:59 pm ✈ ✈ Oct 18 - Oct 25
4896 11:57 am 2:59 pm ✈ ✈ Sep 27 - Oct 4
4896 11:57 am 2:59 pm ✈ ✈ Sep 28 - Oct 3
4896 11:57 am 2:59 pm ✈ Oct 2 - Oct 2
4896 11:57 am 2:59 pm ✈ ✈ ✈ ✈ Oct 5 - Oct 15
4896 11:57 am 2:59 pm ✈ Oct 6 - Oct 13
4896 11:57 am 2:59 pm ✈ ✈ Oct 10 - Oct 23
4896 12:00 pm 3:03 pm ✈ ✈ Oct 30 - Nov 1
4896 12:00 pm 3:03 pm ✈ ✈ Oct 29 - Nov 2
4676 1:25 pm 4:25 pm ✈ ✈ ✈ Oct 19 - Oct 28
4676 1:25 pm 4:25 pm ✈ ✈ Sep 27 - Oct 4
4676 1:25 pm 4:25 pm ✈ ✈ ✈ Sep 28 - Oct 3
4676 1:25 pm 4:25 pm ✈ Oct 2 - Oct 2
4676 1:25 pm 4:25 pm ✈ ✈ ✈ ✈ Oct 5 - Oct 15
4676 1:25 pm 4:25 pm ✈ ✈ Oct 18 - Oct 25
4676 1:25 pm 4:25 pm ✈ ✈ Oct 10 - Oct 23
4676 1:25 pm 4:25 pm ✈ ✈ Oct 6 - Oct 14
4676 1:25 pm 4:25 pm ✈ Oct 20 - Oct 27
4676 1:26 pm 4:25 pm ✈ ✈ Oct 29 - Nov 2
6292 1:26 pm 4:25 pm ✈ Oct 30 - Oct 30
4667 6:00 pm 8:57 pm ✈ ✈ Oct 30 - Nov 3
4667 6:00 pm 8:57 pm ✈ ✈ ✈ ✈ ✈ Oct 29 - Nov 4
4870 6:17 pm 9:20 pm ✈ Oct 8 - Oct 22
6185 6:17 pm 9:20 pm ✈ ✈ ✈ ✈ ✈ ✈ ✈ Sep 10 - Oct 7
6185 6:17 pm 9:20 pm ✈ ✈ ✈ ✈ ✈ ✈ Oct 9 - Oct 28
* 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
St. Louis
$203
Destination
Washington
$203
Airlines Airline reviews

18 travelers who booked a flight from St. Louis to Washington rated their chosen airlines with an average of 7.5.

Overall
7.6
Boarding
8.0
Crew
8.7
Comfort
7.2
Food
6.3
Entertainment
6.4