Find Cheap Flights from Lambert-St Louis to Ontario (STL - ONT)

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.
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Book cheap flights from Lambert-St Louis to Ontario

(Round-trip)
Depart: Wed Aug 23 2017 Return: Mon Aug 28 2017 Trip spans 6 days
American Airlines
American Airlines
STL
1:25p
ONT
9:10p
7h 45m
1 stop
ONT
12:25p
STL
5:48p
5h 23m
1 stop
Depart: Sat Dec 2 2017 Return: Sat Dec 9 2017 Trip spans 8 days
United
United
STL
3:55a
ONT
9:38a
5h 43m
1 stop
ONT
3:00a
STL
9:44a
6h 44m
1 stop
Depart: Fri Dec 1 2017 Return: Mon Dec 11 2017 Trip spans 11 days
Delta
Delta
STL
1:45p
ONT
7:44p
5h 59m
1 stop
ONT
5:20a
STL
10:59a
5h 39m
1 stop
Depart: Fri Oct 6 2017 Return: Sun Oct 8 2017 Trip spans 3 days
Major Airline
Major Airline
STL
12:55a
ONT
10:11a
9h 16m
3 stops
ONT
3:40a
STL
11:25a
7h 45m
3 stops
Depart: Thu Sep 14 2017 Return: Tue Sep 19 2017 Trip spans 6 days
American Airlines
American Airlines
STL
4:00a
ONT
11:26a
7h 26m
1 stop
ONT
9:10p
STL
4:50a
7h 40m
1 stop
Depart: Mon Dec 4 2017 Return: Sat Dec 9 2017 Trip spans 6 days
United
United
STL
2:28a
ONT
9:38a
7h 10m
1 stop
ONT
3:00a
STL
9:44a
6h 44m
1 stop
Depart: Tue Dec 5 2017 Return: Sat Dec 9 2017 Trip spans 5 days
United
United
STL
11:40a
ONT
5:00p
5h 20m
1 stop
ONT
1:00a
STL
6:07a
5h 07m
1 stop
Depart: Sat Oct 7 2017 Return: Tue Oct 10 2017 Trip spans 4 days
American Airlines
American Airlines
STL
10:30a
ONT
4:28p
5h 58m
1 stop
ONT
12:30p
STL
5:51p
5h 21m
1 stop
Depart: Wed Dec 6 2017 Return: Sat Dec 9 2017 Trip spans 4 days
United
United
STL
2:28a
ONT
9:38a
7h 10m
1 stop
ONT
1:00a
STL
6:07a
5h 07m
1 stop
Depart: Thu Dec 7 2017 Return: Sat Dec 9 2017 Trip spans 3 days
United
United
STL
12:55a
ONT
9:38a
8h 43m
1 stop
ONT
1:00a
STL
8:44a
7h 44m
1 stop
Depart: Mon Jul 24 2017 Return: Wed Aug 2 2017 Trip spans 10 days
Major Airline
Major Airline
STL
10:30p
ONT
4:18p
17h 48m
2 stops
ONT
4:00a
STL
1:35p
9h 35m
2 stops
Depart: Thu Aug 31 2017 Return: Sun Sep 3 2017 Trip spans 4 days
American Airlines
American Airlines
STL
3:45a
ONT
9:43a
5h 58m
1 stop
ONT
9:10p
STL
2:52a
5h 42m
1 stop
Depart: Fri Sep 8 2017 Return: Mon Sep 11 2017 Trip spans 4 days
American Airlines
American Airlines
STL
2:05a
ONT
8:03a
5h 58m
1 stop
ONT
12:25p
STL
5:48p
5h 23m
1 stop
Depart: Thu Jul 27 2017 Return: Mon Jul 31 2017 Trip spans 5 days
Major Airline
Major Airline
STL
9:48a
ONT
4:20a
18h 32m
1 stop
ONT
11:50a
STL
7:07a
19h 17m
1 stop
Depart: Sun Dec 3 2017 Return: Wed Dec 13 2017 Trip spans 11 days
United
United
STL
2:28a
ONT
9:38a
7h 10m
1 stop
ONT
1:00a
STL
6:07a
5h 07m
1 stop
Depart: Sun Jul 30 2017 Return: Sat Aug 5 2017 Trip spans 7 days
Delta
Delta
STL
1:35a
ONT
7:37a
6h 02m
1 stop
ONT
8:43a
STL
2:50p
6h 07m
1 stop
Depart: Sat Dec 30 2017 Return: Sat Jan 6 2018 Trip spans 8 days
American Airlines
American Airlines
STL
2:09p
ONT
8:08p
5h 59m
1 stop
ONT
9:15a
STL
2:58p
5h 43m
1 stop
Depart: Thu Jul 20 2017 Return: Mon Jul 24 2017 Trip spans 5 days
Major Airline
Major Airline
STL
11:17a
ONT
4:18p
29h 01m
1 stop
ONT
11:50a
STL
7:07a
19h 17m
1 stop
Depart: Wed Aug 9 2017 Return: Mon Aug 28 2017 Trip spans 20 days
United
United
STL
3:00a
ONT
10:15a
7h 15m
1 stop
ONT
12:50p
STL
7:17p
6h 27m
1 stop
Depart: Thu Aug 10 2017 Return: Mon Aug 14 2017 Trip spans 5 days
American Airlines
American Airlines
STL
4:00a
ONT
11:23a
7h 23m
1 stop
ONT
9:10p
STL
2:50a
5h 40m
1 stop
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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Airports
Origin

St. Louis
$308
Destination

Ontario
$308