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: Fri Dec 1 2017 Return: Mon Dec 4 2017 Trip spans 4 days
Frontier
Frontier
STL
12:00a
ONT
2:10a
26h 10m
1 stop
ONT
12:00a
STL
10:24p
22h 24m
1 stop
Depart: Wed Jan 10 2018 Return: Wed Jan 17 2018 Trip spans 8 days
Delta
Delta
STL
12:00a
ONT
6:01a
6h 01m
1 stop
ONT
12:00a
STL
5:45a
5h 45m
1 stop
Depart: Wed Feb 14 2018 Return: Sun Feb 18 2018 Trip spans 5 days
Multiple Airlines
Multiple Airlines
STL
12:00a
ONT
8:16a
8h 16m
1 stop
ONT
12:00a
STL
7:24p
19h 24m
1 stop
Depart: Sun Dec 17 2017 Return: Tue Jan 16 2018 Trip spans 31 days
Frontier
Frontier
STL
12:00a
ONT
5:12p
17h 12m
1 stop
ONT
12:00a
STL
7:24p
19h 24m
1 stop
Depart: Thu Nov 23 2017 Return: Sat Dec 2 2017 Trip spans 10 days
Frontier
Frontier
STL
12:00a
ONT
7:35p
19h 35m
1 stop
ONT
12:00a
STL
10:24p
22h 24m
1 stop
Depart: Sun Feb 4 2018 Return: Sat Feb 24 2018 Trip spans 21 days
Frontier
Frontier
STL
12:00a
ONT
5:12p
17h 12m
1 stop
ONT
12:00a
STL
10:27p
22h 27m
1 stop
Depart: Thu Nov 2 2017 Return: Sun Nov 5 2017 Trip spans 4 days
Frontier
Frontier
STL
12:00a
ONT
7:34p
19h 34m
1 stop
ONT
12:00a
STL
6:30p
19h 30m
1 stop
Depart: Thu Jan 25 2018 Return: Mon Jan 29 2018 Trip spans 5 days
Frontier
Frontier
STL
12:00a
ONT
5:12p
17h 12m
1 stop
ONT
12:00a
STL
10:27p
22h 27m
1 stop
Depart: Thu Oct 26 2017 Return: Sun Oct 29 2017 Trip spans 4 days
Multiple Airlines
Multiple Airlines
STL
12:00a
ONT
7:49p
19h 49m
1 stop
ONT
12:00a
STL
5:40a
5h 40m
1 stop
Depart: Thu Dec 21 2017 Return: Thu Dec 28 2017 Trip spans 8 days
Frontier
Frontier
STL
12:00a
ONT
4:57p
16h 57m
1 stop
ONT
12:00a
STL
7:24p
19h 24m
1 stop
Depart: Thu Dec 28 2017 Return: Tue Jan 2 2018 Trip spans 6 days
Frontier
Frontier
STL
12:00a
ONT
4:57p
16h 57m
1 stop
ONT
12:00a
STL
7:24p
19h 24m
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
$241
Destination

Ontario
$241