Take off on cheap flights from Ontario to Denver, your adventure starts now!

Find cheap airline tickets from Ontario to Denver by date

  • any
  • July 2018
  • August 2018
  • September 2018
  • October 2018
  • November 2018
  • December 2018
  • January 2019
  • February 2019
  • March 2019
  • April 2019
  • May 2019
  • June 2019
  • any
  • July 2018
  • August 2018
  • September 2018
  • October 2018
  • November 2018
  • December 2018
  • January 2019
  • February 2019
  • March 2019
  • April 2019
  • May 2019
  • June 2019
  • price
  • month of departure
  • month of return
$106
outward: Sep 18, 2018
3:00p ONT » 5:18p DEN
Frontier Airlines direct (2h18m)
inbound: Sep 20, 2018
3:35p DEN » 5:58p ONT
Frontier Airlines direct (2h23m)
$116
outward: Sep 8, 2018
4:27a ONT » 6:45a DEN
Frontier Airlines direct (2h18m)
inbound: Sep 11, 2018
6:05a DEN » 8:28a ONT
Frontier Airlines direct (2h23m)
$119
outward: Aug 18, 2018
4:39a ONT » 6:56a DEN
Frontier Airlines direct (2h17m)
inbound: Aug 21, 2018
6:05a DEN » 8:24a ONT
Frontier Airlines direct (2h19m)
$123
outward: Aug 1, 2018
5:30p LAX » 7:53p DEN
Spirit Airlines direct (2h23m)
inbound: Aug 6, 2018
11:20p DEN » 1:46a LAX
Spirit Airlines direct (2h26m)
$131
outward: Sep 6, 2018
3:00p ONT » 5:18p DEN
Frontier Airlines direct (2h18m)
inbound: Sep 11, 2018
6:05a DEN » 8:28a ONT
Frontier Airlines direct (2h23m)
$137
outward: Oct 23, 2018
10:35p ONT » 12:45a DEN
United Airlines direct (2h10m)
inbound: Nov 1, 2018
1:57a DEN » 4:10a ONT
United Airlines direct (2h13m)
$138
outward: Sep 6, 2018
9:38p LAX » 12:04a DEN
Frontier Airlines direct (2h26m)
inbound: Sep 16, 2018
4:47p DEN » 7:23p LAX
Frontier Airlines direct (2h36m)
$141
outward: Sep 7, 2018
4:22a SNA » 6:33a DEN
Frontier Airlines direct (2h11m)
inbound: Sep 9, 2018
5:30p DEN » 8:01p SNA
Frontier Airlines direct (2h31m)
$143
outward: Aug 2, 2018
4:26a ONT » 6:43a DEN
Frontier Airlines direct (2h17m)
inbound: Aug 7, 2018
6:05a DEN » 8:24a ONT
Frontier Airlines direct (2h19m)
$143
outward: Aug 2, 2018
4:26a ONT » 6:43a DEN
Frontier Airlines direct (2h17m)
inbound: Aug 7, 2018
6:05a DEN » 8:24a ONT
Frontier Airlines direct (2h19m)
$144
outward: Aug 2, 2018
2:30p ONT » 4:47p DEN
Frontier Airlines direct (2h17m)
inbound: Aug 7, 2018
6:05a DEN » 8:24a ONT
Frontier Airlines direct (2h19m)
$164
outward: Jul 28, 2018
4:22a SNA » 6:41a DEN
Frontier Airlines direct (2h19m)
inbound: Jul 29, 2018
3:50p DEN » 6:17p SNA
Frontier Airlines direct (2h27m)
$164
outward: Aug 19, 2018
3:00p ONT » 5:17p DEN
Frontier Airlines direct (2h17m)
inbound: Aug 30, 2018
6:05a DEN » 8:24a ONT
Frontier Airlines direct (2h19m)
$174
outward: Jul 17, 2018
4:26a ONT » 6:43a DEN
Frontier Airlines direct (2h17m)
inbound: Jul 22, 2018
3:45p DEN » 6:04p ONT
Frontier Airlines direct (2h19m)
$177
outward: Oct 6, 2018
4:27a ONT » 6:45a DEN
Frontier Airlines direct (2h18m)
inbound: Oct 9, 2018
6:05a DEN » 8:28a ONT
Frontier Airlines direct (2h23m)
$177
outward: Oct 6, 2018
4:27a ONT » 6:45a DEN
Frontier Airlines direct (2h18m)
inbound: Oct 9, 2018
3:35p DEN » 5:58p ONT
Frontier Airlines direct (2h23m)
$177
outward: Oct 6, 2018
4:27a ONT » 6:45a DEN
Frontier Airlines direct (2h18m)
inbound: Oct 9, 2018
3:35p DEN » 5:58p ONT
Frontier Airlines direct (2h23m)
$182
outward: Jul 31, 2018
4:26a ONT » 6:43a DEN
Frontier Airlines direct (2h17m)
inbound: Aug 7, 2018
6:05a DEN » 8:24a ONT
Frontier Airlines direct (2h19m)
$193
outward: Sep 6, 2018
3:00p ONT » 5:18p DEN
Frontier Airlines direct (2h18m)
inbound: Sep 9, 2018
3:35p DEN » 5:58p ONT
Frontier Airlines direct (2h23m)
$239
outward: Nov 22, 2018
2:35p ONT » 4:41p DEN
United Airlines direct (2h06m)
inbound: Nov 28, 2018
2:57a DEN » 5:10a ONT
United Airlines direct (2h13m)
$256
outward: Sep 6, 2018
3:00p ONT » 5:18p DEN
Frontier Airlines direct (2h18m)
inbound: Sep 17, 2018
3:55a DEN » 6:05a ONT
United Airlines direct (2h10m)
Return
Departure
Choose when you'd like to depart to Denver (USA):
Find the cheapest Ontario Denver flight by browsing the dates below to find alternative flight prices found in the last days. To launch a flight search for Ontario - Denver with these new dates, click on an offer. Want to depart from another city? Choose: Las Vegas - Denver New York - Denver London - Denver Miami - Denver Chicago - Denver San Francisco - Denver See more routes

Airlines operating flights from Ontario to Denver

  • any
  • July 2018
  • August 2018
  • September 2018
  • October 2018
  • November 2018
  • December 2018
  • January 2019
  • February 2019
  • March 2019
  • April 2019
  • May 2019
  • June 2019
  • all
  • Frontier Airlines
  • United Airlines
Frontier Airlines
outbound: Aug 25, 2018
Frontier Airlines direct
return: Sep 8, 2018
Frontier Airlines direct
United Airlines
outbound: Aug 1, 2018
United Airlines direct
return: Aug 6, 2018
United Airlines direct

Travel tips for flights Ontario - Denver

Average flight duration: 2h20m (direct flight)

  • Arrival city:
  • Denver, USA
  • Airport(s):
  • Centennial Airport (APA)
  • Rocky Mountain Metropolitan Airport (BJC)
  • Denver International Airport (DEN)
  • Local time:
  • Jul 16, 2018 12:25 PM, GMT-6
  • Weather:
  • min. 63ºF, max. 84ºF
  • Departure city:
  • Ontario, USA
  • Airport(s):
  • Ontario International Airport (ONT)
  • Local time:
  • Jul 16, 2018 11:25 AM, GMT-7
  • Weather:
  • min. 69ºF, max. 89ºF