SEARCH ONE AND DONE. - Compare hundreds of travel sites at once.
Choose where to book.
Find deals from over 400 airlines worldwide.

Cheap Flights from Denver to Ontario (DEN - ONT)

DepartReturn
1 adult
Note: some airlines charge for infants in laps.
The price shown for each flight will be the average for all passengers including any infants.
Choose Sites to Compare vs. KAYAK

Best fares from DEN to ONT (Found by others)

Sun Mon Tue Wed Thu Fri Sat
  1
$2
2
$2
3
$2
4
$2
5
$2
6
$2
7
$2
8
$2
9
$2
10
$2
11
$2
12 $339 13 $333
14 $384 15 $284 16 $321 17 $326 18 $326 19 $326 20 $387
21 $353 22 $297 23 $226 24 $281 25 $281 26 $281 27 $246
28 $257 29 $241 30 $209        
KAYAK searches hundreds of sites to find the best rate for your next flight from Denver to Ontario. Get the best flight deal for your Ontario trip!
Here's how it works. Search KAYAK for a flight ticket from Denver to Ontario. Sort, filter and compare results on one web page. Then book your plane ticket direct on the airline or travel agent site of your choice!
Direct flights DEN to ONT on United
Flight # Depart DEN Arrive ONT Sun Mon Tue Wed Thu Fri Sat Valid Between
6281 11:35 am 12:48 pm Sep 21 - Oct 24
6281 11:35 am 12:52 pm Sep 24 - Oct 22
5518 6:50 pm 8:07 pm Sep 20 - Oct 25
5518 6:50 pm 8:07 pm Sep 23 - Oct 21
5518 10:06 pm 11:21 pm Sep 24 - Oct 22
5518 10:06 pm 11:21 pm Sep 25 - Oct 24