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 $365 2 $366 3 $318 4 $318
5 $376 6 $419 7 $286 8 $288 9 $290 10 $294 11 $290
12 $294 13 $286 14 $241 15 $241 16 $241 17 $258 18 $237
19 $262 20 $273 21 $231 22 $241 23 $233 24 $258 25
$258
26 $258 27 $228 28 $233 29 $237 30 $241 31 $241  
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
5518 11:16 am 12:36 pm Oct 31 - Oct 31
6281 11:16 am 12:40 pm Oct 26 - Oct 30
6281 11:16 am 12:40 pm Nov 2 - Nov 23
6281 11:25 am 12:45 pm Oct 29 - Oct 29
6281 11:25 am 12:49 pm Nov 5 - Nov 19
5518 11:35 am 12:55 pm Oct 28 - Oct 28
5518 11:35 am 12:55 pm Nov 4 - Nov 18
6281 11:35 am 12:48 pm Sep 30 - Oct 24
6281 11:35 am 12:52 pm Oct 1 - Oct 22
5518 6:50 pm 8:07 pm Sep 30 - Oct 21
5518 6:50 pm 8:07 pm Oct 4 - Oct 25
5518 7:00 pm 8:23 pm Nov 8 - Nov 22
5518 7:00 pm 8:23 pm Nov 1 - Nov 1
5518 9:56 pm 11:15 pm Nov 2 - Nov 23
5518 9:56 pm 11:15 pm Oct 26 - Oct 30
5518 10:06 pm 11:21 pm Oct 2 - Oct 24
5518 10:06 pm 11:21 pm Oct 1 - Oct 22