Find Deals on Flights from Ontario to Denver International (ONT - DEN)

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 Ontario to Denver International

(Round-trip)
Depart: Sat May 6 2017 Return: Tue May 9 2017 Trip spans 4 days
United
United
ONT
1:35a
DEN
3:55a
2h 20m
nonstop
DEN
1:30p
ONT
9:11p
7h 41m
1 stop
Depart: Sat Jun 3 2017 Return: Sat Jun 10 2017 Trip spans 8 days
Major Airline
Major Airline
ONT
4:04a
DEN
10:28a
6h 24m
1 stop
DEN
3:00a
ONT
9:17a
6h 17m
1 stop
Depart: Tue Apr 18 2017 Return: Wed Apr 19 2017 Trip spans 2 days
American Airlines
American Airlines
ONT
8:45a
DEN
12:54p
4h 09m
1 stop
DEN
1:55a
ONT
8:41a
6h 46m
1 stop
Depart: Sun Apr 16 2017 Return: Tue Apr 18 2017 Trip spans 3 days
Delta
Delta
ONT
2:00a
DEN
6:10a
4h 10m
1 stop
DEN
1:35p
ONT
7:49p
6h 14m
1 stop
Depart: Wed Aug 16 2017 Return: Wed Aug 23 2017 Trip spans 8 days
Southwest
Southwest
ONT
12:00p
DEN
2:05p
2h 05m
nonstop
DEN
4:20a
ONT
6:35a
2h 15m
nonstop
Depart: Tue Jun 6 2017 Return: Mon Jun 12 2017 Trip spans 7 days
Major Airline
Major Airline
ONT
10:20p
DEN
4:45a
6h 25m
nonstop
DEN
8:46a
ONT
3:16p
6h 30m
nonstop
Depart: Wed Apr 19 2017 Return: Sat Apr 22 2017 Trip spans 4 days
American Airlines
American Airlines
ONT
2:20a
DEN
6:30a
4h 10m
1 stop
DEN
8:15a
ONT
12:36p
4h 21m
1 stop
Depart: Sat Jun 10 2017 Return: Sat Jun 17 2017 Trip spans 8 days
United
United
ONT
1:35a
DEN
3:52a
2h 17m
nonstop
DEN
12:10p
ONT
2:30p
2h 20m
nonstop
Depart: Sat Apr 29 2017 Return: Sun Apr 30 2017 Trip spans 2 days
Delta
Delta
ONT
2:00a
DEN
7:32a
5h 32m
1 stop
DEN
2:10a
ONT
6:47a
4h 37m
1 stop
Depart: Sat Apr 22 2017 Return: Sat Apr 29 2017 Trip spans 8 days
American Airlines
American Airlines
ONT
2:20a
DEN
6:30a
4h 10m
1 stop
DEN
1:55a
ONT
6:01a
4h 06m
1 stop
Depart: Mon Apr 24 2017 Return: Wed Apr 26 2017 Trip spans 3 days
Major Airline
Major Airline
ONT
10:20p
DEN
2:12p
15h 52m
1 stop
DEN
2:50a
ONT
3:14p
12h 24m
1 stop
Depart: Tue Apr 25 2017 Return: Wed Apr 26 2017 Trip spans 2 days
United
United
ONT
5:16a
DEN
11:34a
6h 18m
1 stop
DEN
11:41a
ONT
5:31p
5h 50m
1 stop
Depart: Sat Sep 9 2017 Return: Thu Sep 14 2017 Trip spans 6 days
Southwest
Southwest
ONT
2:30a
DEN
4:40a
2h 10m
nonstop
DEN
4:20a
ONT
6:35a
2h 15m
nonstop
Depart: Tue May 2 2017 Return: Tue May 9 2017 Trip spans 8 days
American Airlines
American Airlines
ONT
8:45a
DEN
12:54p
4h 09m
1 stop
DEN
2:41p
ONT
6:45p
4h 04m
1 stop
Depart: Wed Apr 26 2017 Return: Sat Apr 29 2017 Trip spans 4 days
United
United
ONT
8:36a
DEN
4:24p
7h 48m
1 stop
DEN
1:30p
ONT
9:06p
7h 36m
1 stop
Depart: Wed May 17 2017 Return: Wed May 24 2017 Trip spans 8 days
Major Airline
Major Airline
ONT
3:45a
DEN
2:13p
10h 28m
1 stop
DEN
2:55a
ONT
9:30a
6h 35m
1 stop
Depart: Mon Jun 5 2017 Return: Tue Jul 4 2017 Trip spans 30 days
Southwest
Southwest
ONT
12:25p
DEN
2:35p
2h 10m
nonstop
DEN
6:45p
ONT
8:55p
2h 10m
nonstop
Depart: Wed May 3 2017 Return: Wed May 10 2017 Trip spans 8 days
American Airlines
American Airlines
ONT
8:45a
DEN
12:54p
4h 09m
1 stop
DEN
11:00a
ONT
3:26p
4h 26m
1 stop
Depart: Sun Apr 30 2017 Return: Sat May 6 2017 Trip spans 7 days
Delta
Delta
ONT
2:00a
DEN
7:32a
5h 32m
1 stop
DEN
3:29a
ONT
9:13a
5h 44m
1 stop
Depart: Sat Apr 15 2017 Return: Wed Apr 19 2017 Trip spans 5 days
United
United
ONT
1:40a
DEN
3:56a
2h 16m
nonstop
DEN
9:22a
ONT
5:31p
8h 09m
1 stop
Direct flights ONT to DEN on United
Flight # Depart ONT Arrive DEN Sun Mon Tue Wed Thu Fri Sat Valid Between
1852 5:35 am 8:55 am Mar 27 - Apr 3
1852 5:40 am 8:56 am Apr 13 - Apr 13
1852 5:40 am 8:56 am Apr 4 - Apr 12
1852 5:40 am 8:56 am Apr 14 - May 4
1635 1:25 pm 4:43 pm Apr 4 - Apr 25
1635 1:25 pm 4:43 pm Apr 27 - May 4
1635 1:30 pm 4:48 pm Mar 27 - Apr 3
1635 1:35 pm 4:52 pm Apr 26 - Apr 26
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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Airports
Origin

Ontario
$239
Destination

Denver
$239
Airlines Airline reviews

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

Overall
7.3
Boarding
7.2
Crew
7.5
Comfort
7.1
Food
6.4
Entertainment
6.1