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.
Compare vs. KAYAK all | none
Browse Origins:
Browse Destinations:

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

Book cheap flights from Denver International to Ontario

(Round-trip)
Depart: Tue Oct 3 2017 Return: Sat Oct 7 2017 Trip spans 5 days
American Airlines
American Airlines
DEN
11:00a
ONT
3:26p
4h 26m
1 stop
ONT
8:45a
DEN
12:48p
4h 03m
1 stop
Depart: Thu Jul 6 2017 Return: Tue Jul 11 2017 Trip spans 6 days
United
United
DEN
3:20p
ONT
5:40p
2h 20m
nonstop
ONT
1:25a
DEN
3:42a
2h 17m
nonstop
Depart: Sun Jul 9 2017 Return: Sat Jul 15 2017 Trip spans 7 days
Major Airline
Major Airline
DEN
10:45p
ONT
3:16p
16h 31m
2 stops
ONT
9:15a
DEN
3:42p
6h 27m
2 stops
Depart: Tue Aug 8 2017 Return: Sat Aug 12 2017 Trip spans 5 days
Delta
Delta
DEN
2:00a
ONT
6:37a
4h 37m
1 stop
ONT
2:00a
DEN
6:12a
4h 12m
1 stop
Depart: Thu Oct 19 2017 Return: Sun Oct 22 2017 Trip spans 4 days
Southwest
Southwest
DEN
6:10p
ONT
8:25p
2h 15m
nonstop
ONT
2:45a
DEN
5:00a
2h 15m
nonstop
Depart: Tue Oct 10 2017 Return: Wed Oct 25 2017 Trip spans 16 days
American Airlines
American Airlines
DEN
3:45a
ONT
8:46a
5h 01m
1 stop
ONT
8:45a
DEN
12:48p
4h 03m
1 stop
Depart: Tue Jul 11 2017 Return: Sat Jul 15 2017 Trip spans 5 days
United
United
DEN
3:20p
ONT
5:40p
2h 20m
nonstop
ONT
1:25a
DEN
3:42a
2h 17m
nonstop
Depart: Wed Sep 27 2017 Return: Wed Oct 4 2017 Trip spans 8 days
American Airlines
American Airlines
DEN
11:00a
ONT
3:26p
4h 26m
1 stop
ONT
8:45a
DEN
12:55p
4h 10m
1 stop
Depart: Thu Sep 7 2017 Return: Sat Sep 9 2017 Trip spans 3 days
United
United
DEN
7:25a
ONT
9:45a
2h 20m
nonstop
ONT
1:44a
DEN
4:01a
2h 17m
nonstop
Depart: Fri Aug 18 2017 Return: Sat Aug 19 2017 Trip spans 2 days
Major Airline
Major Airline
DEN
8:46a
ONT
3:18p
6h 32m
1 stop
ONT
10:20p
DEN
4:45a
6h 25m
1 stop
Depart: Fri Sep 22 2017 Return: Mon Sep 25 2017 Trip spans 4 days
Delta
Delta
DEN
3:30p
ONT
7:44p
4h 14m
1 stop
ONT
2:00a
DEN
7:25a
5h 25m
1 stop
Depart: Wed Jul 26 2017 Return: Sat Jul 29 2017 Trip spans 4 days
United
United
DEN
1:30a
ONT
7:04a
5h 34m
1 stop
ONT
1:25a
DEN
3:42a
2h 17m
nonstop
Depart: Thu Aug 10 2017 Return: Fri Aug 11 2017 Trip spans 2 days
Major Airline
Major Airline
DEN
3:00a
ONT
9:16a
6h 16m
2 stops
ONT
10:20p
DEN
4:45a
6h 25m
2 stops
Depart: Sat Aug 12 2017 Return: Fri Aug 18 2017 Trip spans 7 days
United
United
DEN
12:10p
ONT
2:30p
2h 20m
nonstop
ONT
12:50p
DEN
7:49p
6h 59m
1 stop
Depart: Thu Aug 3 2017 Return: Tue Aug 8 2017 Trip spans 6 days
Delta
Delta
DEN
2:00a
ONT
6:37a
4h 37m
1 stop
ONT
2:00a
DEN
7:30a
5h 30m
1 stop
Depart: Wed Aug 9 2017 Return: Tue Aug 15 2017 Trip spans 7 days
Major Airline
Major Airline
DEN
8:46a
ONT
3:18p
6h 32m
1 stop
ONT
9:15a
DEN
3:44p
6h 29m
1 stop
Depart: Mon Aug 14 2017 Return: Sat Aug 19 2017 Trip spans 6 days
American Airlines
American Airlines
DEN
11:00a
ONT
3:26p
4h 26m
1 stop
ONT
8:45a
DEN
12:57p
4h 12m
1 stop
Depart: Sat Dec 16 2017 Return: Tue Dec 19 2017 Trip spans 4 days
Delta
Delta
DEN
9:45a
ONT
5:02p
7h 17m
1 stop
ONT
1:00a
DEN
6:25a
5h 25m
1 stop
Depart: Thu Jul 13 2017 Return: Sat Jul 15 2017 Trip spans 3 days
United
United
DEN
3:20p
ONT
5:40p
2h 20m
nonstop
ONT
1:25a
DEN
3:42a
2h 17m
nonstop
Depart: Sat Jul 15 2017 Return: Sat Jul 22 2017 Trip spans 8 days
United
United
DEN
12:10p
ONT
2:30p
2h 20m
nonstop
ONT
1:25a
DEN
3:42a
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 11:19 am 12:38 pm Jul 3 - Jul 4
5246 11:19 am 12:42 pm Jul 9 - Aug 13
2033 11:20 am 12:39 pm Jun 22 - Jun 30
2033 11:21 am 12:40 pm Jul 6 - Aug 14
2033 11:22 am 12:41 pm Jul 2 - Jul 2
727 4:10 pm 5:30 pm Jul 1 - Aug 12
1199 7:20 pm 8:40 pm Jul 9 - Jul 13
1199 7:20 pm 8:40 pm Jul 17 - Jul 23
1199 7:20 pm 8:40 pm Jul 21 - Jul 21
1199 7:20 pm 8:40 pm Jul 24 - Jul 25
1199 7:20 pm 8:36 pm Jul 28 - Jul 28
1199 7:20 pm 8:36 pm Jul 10 - Jul 16
1199 7:20 pm 8:40 pm Jul 7 - Jul 14
1199 7:20 pm 8:40 pm Jul 5 - Jul 6
1199 7:20 pm 8:40 pm Jul 3 - Jul 3
1199 7:20 pm 8:40 pm Jul 26 - Aug 1
214 7:20 pm 8:40 pm Jul 2 - Jul 4
1199 7:25 pm 8:42 pm Jun 23 - Jun 30
1199 7:25 pm 8:42 pm Jun 21 - Jun 29
1199 7:26 pm 8:43 pm Jul 19 - Jul 19
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

We attempt to get accurate prices, however, prices are not guaranteed.

Here's why:

We’re not the seller.
At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

We compile tonnes of data for you
Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.

If you have more questions or if you have a bad price to report to us,
please send us an email and someone from our team will get back to you promptly.

Airports
Origin

Denver
$190
Destination

Ontario
$190
Airlines Airline reviews

19 travelers who booked a flight from Denver to Ontario rated their chosen airlines with an average of 7.1.

Overall
7.5
Boarding
7.2
Crew
7.8
Comfort
7.5
Food
6.5
Entertainment
6.4