Browse Origins:
Browse Destinations:

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

Dates flexible? Here are the best fares found in the past 48 hours...

Book cheap flights from Ontario to Denver International

(Round-trip)
Depart: Sat Apr 4 2015 Return: Sun Apr 12 2015 Trip spans 9 days
Delta
Delta
ONT
2:10a
DEN
7:26a
5h 16m
1 stop
DEN
2:10a
ONT
6:28a
4h 18m
1 stop
Depart: Tue Apr 14 2015 Return: Sun Apr 19 2015 Trip spans 6 days
Delta
Delta
ONT
6:05a
DEN
12:21p
6h 16m
1 stop
DEN
2:10a
ONT
6:28a
4h 18m
1 stop
Depart: Wed Apr 15 2015 Return: Sun Apr 19 2015 Trip spans 5 days
Delta
Delta
ONT
2:15a
DEN
7:25a
5h 10m
1 stop
DEN
2:10a
ONT
6:28a
4h 18m
1 stop
Depart: Fri Apr 24 2015 Return: Sun Apr 26 2015 Trip spans 3 days
Delta
Delta
ONT
6:05a
DEN
10:19a
4h 14m
1 stop
DEN
2:10a
ONT
6:28a
4h 18m
1 stop
Depart: Sat Apr 25 2015 Return: Tue Apr 28 2015 Trip spans 4 days
Delta
Delta
ONT
12:35p
DEN
4:29p
3h 54m
1 stop
DEN
2:10a
ONT
6:28a
4h 18m
1 stop
Depart: Tue Apr 28 2015 Return: Tue May 5 2015 Trip spans 8 days
Delta
Delta
ONT
12:35p
DEN
4:30p
3h 55m
1 stop
DEN
2:25p
ONT
6:46p
4h 21m
1 stop
Depart: Thu Apr 30 2015 Return: Wed May 6 2015 Trip spans 7 days
Delta
Delta
ONT
6:05a
DEN
10:19a
4h 14m
1 stop
DEN
2:15a
ONT
6:26a
4h 11m
1 stop
Depart: Sat May 2 2015 Return: Wed May 6 2015 Trip spans 5 days
Delta
Delta
ONT
6:20a
DEN
10:10a
3h 50m
1 stop
DEN
2:25p
ONT
6:46p
4h 21m
1 stop
Depart: Sat Apr 18 2015 Return: Mon Apr 20 2015 Trip spans 3 days
United
United
ONT
2:00a
DEN
4:16a
2h 16m
nonstop
DEN
7:36a
ONT
9:59a
2h 23m
nonstop
Depart: Thu Apr 16 2015 Return: Mon Apr 20 2015 Trip spans 5 days
United
United
ONT
1:30a
DEN
6:35a
5h 05m
1 stop
DEN
7:36a
ONT
9:59a
2h 23m
nonstop
Depart: Wed Apr 29 2015 Return: Tue May 5 2015 Trip spans 7 days
United
United
ONT
9:30a
DEN
11:50a
2h 20m
nonstop
DEN
3:00p
ONT
5:19p
2h 19m
nonstop
Depart: Thu Mar 12 2015 Return: Sun Apr 19 2015 Trip spans 39 days
Delta
Delta
ONT
6:05a
DEN
10:19a
4h 14m
1 stop
DEN
2:10a
ONT
6:28a
4h 18m
1 stop
Depart: Fri Mar 13 2015 Return: Tue Mar 24 2015 Trip spans 12 days
Delta
Delta
ONT
2:15a
DEN
6:10a
3h 55m
1 stop
DEN
2:10a
ONT
6:30a
4h 20m
1 stop
Depart: Wed Mar 18 2015 Return: Wed Apr 1 2015 Trip spans 15 days
Delta
Delta
ONT
2:15a
DEN
6:10a
3h 55m
1 stop
DEN
2:10a
ONT
6:30a
4h 20m
1 stop
Depart: Mon Apr 13 2015 Return: Sun Apr 19 2015 Trip spans 7 days
American Airlines
American Airlines
ONT
3:25p
DEN
7:35p
4h 10m
1 stop
DEN
1:45a
ONT
6:05a
4h 20m
1 stop
Depart: Sun May 3 2015 Return: Wed May 6 2015 Trip spans 4 days
US Airways
US Airways
ONT
3:25p
DEN
7:35p
4h 10m
1 stop
DEN
10:55a
ONT
3:05p
4h 10m
1 stop
Depart: Fri Apr 17 2015 Return: Sun Apr 19 2015 Trip spans 3 days
American Airlines
American Airlines
ONT
3:25p
DEN
7:35p
4h 10m
1 stop
DEN
1:45a
ONT
8:33a
6h 48m
1 stop
Depart: Sun Apr 19 2015 Return: Wed Apr 22 2015 Trip spans 4 days
American Airlines
American Airlines
ONT
3:25p
DEN
7:35p
4h 10m
1 stop
DEN
8:17a
ONT
12:38p
4h 21m
1 stop
Depart: Mon Apr 20 2015 Return: Wed Apr 22 2015 Trip spans 3 days
American Airlines
American Airlines
ONT
3:25p
DEN
7:35p
4h 10m
1 stop
DEN
8:17a
ONT
3:05p
6h 48m
1 stop
Depart: Fri May 29 2015 Return: Mon Jun 1 2015 Trip spans 4 days
Multiple Airlines
Multiple Airlines
ONT
1:52p
DEN
6:42p
4h 50m
1 stop
DEN
4:50p
ONT
6:03a
13h 13m
1 stop
Change your search
Direct flights ONT to DEN on United
Flight # Depart ONT Arrive DEN Sun Mon Tue Wed Thu Fri Sat Valid Between
5547 6:00 am 9:24 am Mar 5 - Mar 6
5547 6:00 am 9:24 am Mar 7 - Mar 7
5547 6:00 am 9:24 am Mar 8 - Apr 6
5547 6:00 am 9:20 am Mar 11 - Apr 1
5547 6:00 am 9:24 am Mar 14 - Apr 4
Airports
Origin

Ontario
$181
Destination

Denver
$181