Find Cheap Flights from Denver International to Ontario (DEN - 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 Denver International to Ontario

(Round-trip)
Depart: Wed Oct 25 2017 Return: Sat Oct 28 2017 Trip spans 4 days
Frontier
Frontier
DEN
4:45a
ONT
7:09a
2h 24m
nonstop
ONT
6:55a
DEN
9:14a
2h 19m
nonstop
Depart: Tue Oct 31 2017 Return: Mon Nov 13 2017 Trip spans 14 days
Frontier
Frontier
DEN
12:50p
ONT
3:14p
2h 24m
nonstop
ONT
5:50a
DEN
8:08a
2h 18m
nonstop
Depart: Tue Sep 12 2017 Return: Tue Sep 19 2017 Trip spans 8 days
American Airlines
American Airlines
DEN
4:10a
ONT
8:43a
4h 33m
1 stop
ONT
8:45a
DEN
12:55p
4h 10m
1 stop
Depart: Wed Nov 29 2017 Return: Sat Dec 2 2017 Trip spans 4 days
Frontier
Frontier
DEN
3:40a
ONT
6:09a
2h 29m
nonstop
ONT
5:50a
DEN
8:08a
2h 18m
nonstop
Depart: Thu Sep 7 2017 Return: Tue Sep 12 2017 Trip spans 6 days
United
United
DEN
7:30a
ONT
9:50a
2h 20m
nonstop
ONT
1:45a
DEN
4:02a
2h 17m
nonstop
Depart: Thu Nov 30 2017 Return: Tue Dec 5 2017 Trip spans 6 days
Frontier
Frontier
DEN
11:50a
ONT
2:19p
2h 29m
nonstop
ONT
2:00p
DEN
4:18p
2h 18m
nonstop
Depart: Sat Sep 2 2017 Return: Sun Sep 3 2017 Trip spans 2 days
Delta
Delta
DEN
4:30a
ONT
8:56a
4h 26m
1 stop
ONT
2:00a
DEN
7:30a
5h 30m
1 stop
Depart: Wed Dec 6 2017 Return: Sat Dec 9 2017 Trip spans 4 days
Frontier
Frontier
DEN
3:40a
ONT
6:09a
2h 29m
nonstop
ONT
5:50a
DEN
8:08a
2h 18m
nonstop
Depart: Thu Dec 7 2017 Return: Tue Dec 12 2017 Trip spans 6 days
Frontier
Frontier
DEN
11:50a
ONT
2:19p
2h 29m
nonstop
ONT
2:00p
DEN
4:24p
2h 24m
nonstop
Depart: Sat Dec 9 2017 Return: Tue Dec 12 2017 Trip spans 4 days
Frontier
Frontier
DEN
3:40a
ONT
6:09a
2h 29m
nonstop
ONT
2:00p
DEN
4:24p
2h 24m
nonstop
Depart: Tue Dec 12 2017 Return: Sat Dec 16 2017 Trip spans 5 days
Frontier
Frontier
DEN
11:48a
ONT
2:15p
2h 27m
nonstop
ONT
5:55a
DEN
8:19a
2h 24m
nonstop
Depart: Wed Dec 13 2017 Return: Sat Dec 16 2017 Trip spans 4 days
Frontier
Frontier
DEN
3:40a
ONT
6:07a
2h 27m
nonstop
ONT
5:55a
DEN
8:19a
2h 24m
nonstop
Depart: Wed Sep 13 2017 Return: Tue Sep 19 2017 Trip spans 7 days
American Airlines
American Airlines
DEN
4:10a
ONT
8:43a
4h 33m
1 stop
ONT
8:45a
DEN
12:55p
4h 10m
1 stop
Depart: Thu Dec 14 2017 Return: Tue Dec 19 2017 Trip spans 6 days
Frontier
Frontier
DEN
11:48a
ONT
2:15p
2h 27m
nonstop
ONT
2:00p
DEN
4:24p
2h 24m
nonstop
Depart: Sat Sep 9 2017 Return: Tue Sep 19 2017 Trip spans 11 days
United
United
DEN
7:25a
ONT
9:45a
2h 20m
nonstop
ONT
9:35a
DEN
11:52a
2h 17m
nonstop
Depart: Sat Dec 16 2017 Return: Tue Dec 19 2017 Trip spans 4 days
Frontier
Frontier
DEN
3:40a
ONT
6:07a
2h 27m
nonstop
ONT
2:00p
DEN
4:24p
2h 24m
nonstop
Depart: Mon Sep 11 2017 Return: Tue Sep 12 2017 Trip spans 2 days
United
United
DEN
3:15p
ONT
5:40p
2h 25m
nonstop
ONT
1:45a
DEN
4:02a
2h 17m
nonstop
Depart: Tue Oct 3 2017 Return: Sat Oct 7 2017 Trip spans 5 days
American Airlines
American Airlines
DEN
4:10a
ONT
8:43a
4h 33m
1 stop
ONT
8:45a
DEN
12:56p
4h 11m
1 stop
Depart: Wed Jan 10 2018 Return: Sat Jan 13 2018 Trip spans 4 days
Frontier
Frontier
DEN
3:40a
ONT
6:07a
2h 27m
nonstop
ONT
5:55a
DEN
8:19a
2h 24m
nonstop
Depart: Sat Sep 16 2017 Return: Tue Sep 26 2017 Trip spans 11 days
United
United
DEN
7:25a
ONT
9:45a
2h 20m
nonstop
ONT
1:45a
DEN
4:02a
2h 17m
nonstop
Direct flights DEN to ONT on United
Flight # Depart DEN Arrive ONT Sun Mon Tue Wed Thu Fri Sat Valid Between
2033 11:20 am 12:39 pm Aug 25 - Sep 1
5566 11:21 am 12:44 pm Sep 3 - Sep 3
2033 11:22 am 12:41 pm Sep 5 - Sep 5
5566 11:22 am 12:45 pm Aug 20 - Aug 27
2033 11:25 am 12:45 pm Sep 23 - Sep 30
2033 11:25 am 12:45 pm Sep 6 - Oct 4
2033 11:25 am 12:45 pm Sep 9 - Sep 9
2033 11:25 am 12:45 pm Sep 16 - Sep 16
2033 11:30 am 12:50 pm Sep 7 - Sep 28
529 4:10 pm 5:30 pm Aug 19 - Sep 2
1199 7:15 pm 8:40 pm Sep 19 - Oct 3
1199 7:15 pm 8:40 pm Sep 15 - Sep 22
1199 7:15 pm 8:40 pm Sep 14 - Sep 14
1199 7:15 pm 8:40 pm Sep 24 - Sep 24
1199 7:15 pm 8:40 pm Sep 12 - Sep 12
1199 7:15 pm 8:40 pm Sep 6 - Sep 13
1199 7:15 pm 8:40 pm Sep 10 - Sep 10
1199 7:15 pm 8:40 pm Sep 17 - Sep 17
1199 7:30 pm 8:50 pm Sep 4 - Sep 4
1199 7:30 pm 8:55 pm Sep 25 - Sep 25
1199 7:30 pm 8:50 pm Sep 3 - Sep 3
1199 7:30 pm 8:50 pm Aug 27 - Aug 28
1199 7:30 pm 8:50 pm Aug 25 - Sep 5
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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Airports
Origin

Denver
$82
Destination

Ontario
$82
Airlines Airline reviews

18 travelers who booked a flight from Denver to Ontario rated their chosen airlines with an average of 6.9.

Overall
7.2
Boarding
7.0
Crew
7.6
Comfort
7.2
Food
6.2
Entertainment
6.1