Cheap Flights from Ontario, CA to Denver, CO from $43

One way Round trip

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On Cheapflightsplus.com you will find 5 direct and 73 connecting flights from Ontario to Denver. You can compare airfare deals from 4 airlines and multiple travel sites from $43, book and save on cheap plane tickets and last minute offers. Also check out ONT-DEN flight schedule to find best flight time, convenient departure and arrival airports.

Find One-Way and Round-Trip Ontario to Denver Flight Deals

To find the cheapest one way airline ticket select the date with the lowest price on the calendar below and click «Find Flights». To search for round-trip flight deals click on the link «Check prices for return flights» and select the date of the return flight. Cheapest flights in November: $43 (one-way), $74 (round-trip).

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Best Flights from Ontario to Denver Today

Take a look at the list of non stop flights and flights with layovers from Ontario to Denver with the lowest price of $43. The fastest direct flight takes 2h 19m and the fastest connecting – 3h 54m.

Price	Departure	Arrival	Flight Duration	Airline	Flight
from $43 Find flight	00:49 Ontario Ontario Int.	04:10 Denver Denver International	2h 21m	Frontier Airlines	F91500
from $111 Find flight	05:10 Ontario Ontario Int.	08:29 Denver Denver International	2h 19m	United Airlines	UA2317
from $111 Find flight	13:45 Ontario Ontario Int.	17:04 Denver Denver International	2h 19m	United Airlines	UA2278
from $133 Find flight	05:05 Ontario Ontario Int.	08:24 Denver Denver International	2h 19m	United Airlines	UA1575
from $133 Find flight	13:44 Ontario Ontario Int.	17:03 Denver Denver International	2h 19m	United Airlines	UA1942
from $55 Find flight	19:59 Ontario Ontario Int.	00:53+1 день Denver Denver International	3h 54m layover 0h 43m - Las Vegas	Frontier Airlines	F94206 F94612
from $56 Find flight	08:04 Ontario Ontario Int.	18:40 Denver Denver International	9h 36m layover 6h 22m - Las Vegas	Frontier Airlines	F91358 F92430
from $66 Find flight	16:48 Ontario Ontario Int.	00:50+1 день Denver Denver International	7h 2m layover 1h 21m - Houston	Frontier Airlines	F93132 F94855
from $76 Find flight	12:34 Ontario Ontario Int.	18:40 Denver Denver International	5h 6m layover 1h 52m - Las Vegas	Frontier Airlines	F92232 F92430
from $77 Find flight	06:57 Ontario Ontario Int.	16:21 Denver Denver International	8h 24m layover 2h 47m - Dallas	Frontier Airlines	F91406 F92631
from $82 Find flight	22:59 Ontario Ontario Int.	08:43+1 день Denver Denver International	8h 44m layover 5h 18m - Phoenix	Frontier Airlines	F92404 F91376
from $87 Find flight	17:56 Ontario Ontario Int.	23:47 Denver Denver International	4h 51m layover 1h 24m - Salt Lake City	Frontier Airlines	F91122 F94252
from $120 Find flight	06:00 Ontario Ontario Int.	15:49 Denver Denver International	8h 49m layover 3h 6m - Seattle	Alaska Airlines	AS1091 AS602
from $121 Find flight	10:39 Ontario Ontario Int.	19:40 Denver Denver International	8h 1m layover 3h 40m - San Francisco	United Airlines	UA4639 UA566
from $149 Find flight	11:14 Ontario Ontario Int.	22:36 Denver Denver International	10h 22m layover 1h 22m - Portland 3h 0m - Seattle	Alaska Airlines	AS3312 AS2355 AS321
from $149 Find flight	11:14 Ontario Ontario Int.	22:36 Denver Denver International	10h 22m layover 2h 52m - Portland 1h 30m - Seattle	Alaska Airlines	AS3312 AS2102 AS321

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*Departure and arrival times - local. Prices indicated for one-way flights. Information updated on January 15, 2025

Flight Schedule Ontario (California) to Denver (Colorado)

Full flight schedule will help you in detecting at what time planes fly from Ontario to Denver. You can also specify the concrete flights and airlines on the route and how long the flight actually is. Use the calendar for today, tomorrow or other specific date as some flights are available only on certain days of the week.

Departure	Flight Details	Flight Duration	Price
00:49 — 04:10	00:49 — 04:10 F91500 Frontier Airlines Ontario — Denver	2h 21m	Find flight from$43
05:05 — 08:24	05:05 — 08:24 UA1575 United Airlines Ontario — Denver	2h 19m	Find flight from$133
05:10 — 08:29	05:10 — 08:29 UA2317 United Airlines Ontario — Denver	2h 19m	Find flight from$111
13:44 — 17:03	13:44 — 17:03 UA1942 United Airlines Ontario — Denver	2h 19m	Find flight from$133
13:45 — 17:04	13:45 — 17:04 UA2278 United Airlines Ontario — Denver	2h 19m	Find flight from$111
00:58 — 10:25	00:58 — 05:57 Y41861 Volaris Ontario — Guadalajara 1h 59m stop 07:56 — 10:25 Y41760 Volaris Guadalajara — Denver	8h 27m including layover	Find flight from$361
06:00 — 15:49	06:00 — 08:54 AS1091 Alaska Airlines Ontario — Seattle 3h 6m stop 12:00 — 15:49 AS602 Alaska Airlines Seattle — Denver	8h 49m including layover	Find flight from$120
06:57 — 16:21	06:30 — 11:32 F91406 Frontier Airlines Ontario — Dallas 2h 47m stop 15:42 — 16:57 F92631 Frontier Airlines Dallas — Denver	8h 24m including layover	Find flight from$77
07:00 — 13:57	07:00 — 09:26 AS1058 Alaska Airlines Ontario — Portland 53m stop 10:19 — 13:57 AS336 Alaska Airlines Portland — Denver	5h 57m including layover	Find flight from$163
08:04 — 18:40	13:17 — 14:29 F91358 Frontier Airlines Ontario — Las Vegas 6h 22m stop 00:59 — 03:59 F92430 Frontier Airlines Las Vegas — Denver	9h 36m including layover	Find flight from$56
10:39 — 19:40	10:35 — 12:08 UA4639 United Airlines Ontario — San Francisco 3h 40m stop 16:00 — 19:40 UA566 United Airlines San Francisco — Denver	8h 1m including layover	Find flight from$121
10:39 — 16:35	10:39 — 12:20 UA4639 United Airlines Ontario — San Francisco 35m stop 12:55 — 16:35 UA1791 United Airlines San Francisco — Denver	4h 56m including layover	Find flight from$212
12:28 — 01:06 +1 day	11:46 — 12:55 F91358 Frontier Airlines Ontario — Las Vegas 8h 11m stop 21:53 — 00:49 F94968 Frontier Airlines Las Vegas — Denver	11h 38m including layover	Find flight from$175
12:34 — 18:40	17:26 — 18:36 F92232 Frontier Airlines Ontario — Las Vegas 1h 52m stop 00:59 — 03:59 F92430 Frontier Airlines Las Vegas — Denver	5h 6m including layover	Find flight from$76
15:30 — 21:45	15:30 — 17:14 UA5660 United Airlines Ontario — San Francisco 51m stop 18:05 — 21:45 UA297 United Airlines San Francisco — Denver	5h 15m including layover	Find flight from$184
15:52 — 09:27 +1 day	11:46 — 12:56 F92232 Frontier Airlines Ontario — Las Vegas 13h 20m stop 06:25 — 09:27 F93844 Frontier Airlines Las Vegas — Denver	16h 35m including layover	Find flight from$82
16:06 — 11:07 +1 day	13:53 — 16:46 AS1119 Alaska Airlines Ontario — Seattle 12h 26m stop 06:10 — 09:52 AS682 Alaska Airlines Seattle — Denver	18h 1m including layover	Find flight from$164
16:48 — 00:50 +1 day	13:45 — 18:58 F93132 Frontier Airlines Ontario — Houston 1h 21m stop 20:20 — 22:00 F94855 Frontier Airlines Houston — Denver	7h 2m including layover	Find flight from$66
17:30 — 22:54	17:26 — 18:36 F92232 Frontier Airlines Ontario — Las Vegas 1h 5m stop 20:33 — 23:36 F94612 Frontier Airlines Las Vegas — Denver	4h 24m including layover	Find flight from$77
17:30 — 01:06 +1 day	15:56 — 17:09 F92232 Frontier Airlines Ontario — Las Vegas 3h 17m stop 21:36 — 00:32 F94968 Frontier Airlines Las Vegas — Denver	6h 36m including layover	Find flight from$77
19:59 — 00:53 +1 day	22:58 — 23:59 F94206 Frontier Airlines Ontario — Las Vegas 43m stop 20:44 — 23:48 F94612 Frontier Airlines Las Vegas — Denver	3h 54m including layover	Find flight from$55
20:56 — 10:25 +1 day	20:33 — 01:32 Y41863 Volaris Ontario — Guadalajara 6h 1m stop 07:56 — 10:25 Y41760 Volaris Guadalajara — Denver	12h 29m including layover	Find flight from$351
22:59 — 08:43 +1 day	22:59 — 01:27 F92404 Frontier Airlines Ontario — Phoenix 5h 18m stop 06:45 — 08:43 F91376 Frontier Airlines Phoenix — Denver	8h 44m including layover	Find flight from$82
07:00 — 18:59	07:00 — 09:26 AS1058 Alaska Airlines Ontario — Portland 2h 14m stop 11:40 — 12:41 AS970 Alaska Airlines Portland — Seattle 2h 40m stop 15:21 — 18:59 AS524 Alaska Airlines Seattle — Denver	10h 59m including layover	Find flight from$192
11:14 — 22:36	11:14 — 13:38 AS3312 Alaska Airlines Ontario — Portland 1h 22m stop 15:00 — 15:59 AS2355 Alaska Airlines Portland — Seattle 3h stop 18:59 — 22:36 AS321 Alaska Airlines Seattle — Denver	10h 22m including layover	Find flight from$149
11:14 — 22:36	11:14 — 13:38 AS3312 Alaska Airlines Ontario — Portland 2h 52m stop 16:30 — 17:29 AS2102 Alaska Airlines Portland — Seattle 1h 30m stop 19:38 — 23:15 AS321 Alaska Airlines Seattle — Denver	10h 22m including layover	Find flight from$149

Departure	Arrival	Flight Details	Flight Time	Price
		stop stop	including layover	Find flight from$

*Departure and arrival times - local. Updated on January 15, 2025

Flight Information

Below we will explain in detail what the flights cost on the destination from Ontario to Denver depends on and how to choose the most interesting flight option for you.

Distance between Ontario and Denver is 1316 miles. Time difference between the cities is 1h. Airplanes depart 00:49 to 22:59 from 2 Ontario airports and arrive 00:49 to 22:59 to 2 Denver airports. Average flight time is 2h 19m.

The fastest flight 2h 19m
Average flight time 2h 19m
The earliest flight 00:49
The latest flight 22:59
Distance 818 ml

The cheapest months to travel to Denver are november (from 30 $), january (from 40 $), february (from 43 $).

The most expensive months are december (from 50 $), february (from 43 $), january (from 40 $).

What is the lowest airfare Ontario to Denver?

The cheapest plane ticket found by our users is $43. This airfare is for economy class on one-way F91500 flight by Frontier Airlines for February 21, 2025 which leaves Ontario Int. in Ontario at 00:49 am and arrives at Denver Denver International at 04:10.

Economy class

$43

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Business class

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First class

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Popular Airlines on the Route

The flight Ontario — Denver is served by 4 regular airlines and 2 low-cost airlines. Most of the flights on this route are operated by Alaska Airlines - 36 departures per week at the price of from $ 120 . And the most expensive tickets are offered by Volaris airline - from $ 850.

Direct flights

There are 5 nonstop flights on the route. The fastest direct flight is UA2317 by United Airlines takes 2h 19m and the cheapest is F91500 by Frontier Airlines for $43.

F9 - Frontier Airlines

from $43

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UA - United Airlines

from $111

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Connecting Flights

There are 73 flights with layovers on the route. The fastest connecting flight is F94206 by Frontier Airlines takes 3h 54m and the cheapest is F91500 by Frontier Airlines for $55.

AS - Alaska Airlines

from $120

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F9 - Frontier Airlines

from $55

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UA - United Airlines

from $121

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Y4 - Volaris

from $351

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Airports

You can fly from Ontario to Denver from 2 airports (Ontario Int., International Heliport).

Ontario airports

Ontario Int.-ONT

from $43
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International Heliport-JIO

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Denver airports

Denver International-DEN

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Arapahoe Co-APA

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Airplanes

There are flights to Denver from Ontario by 4 airlines that use 0 aircraft brands. They range from huge modern airplanes to small-sized.

Top Domestic Destinations from Ontario

You may also consider searching for discounted plane tickets to some other popular places from Ontario within United States.

Ontario — Tampa

from $54

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Ontario — Pittsburgh

from $70

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Ontario — Indianapolis

from $62

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Ontario — Cleveland

from $63

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Ontario — Norfolk

from $79

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Ontario — Tucson

from $80

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Ontario — New Orleans

from $63

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Ontario — San Jose

from $61

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Ontario — Honolulu

from $63

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Ontario — Austin

from $67

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Top International Destinations from Ontario

Our state-of-the art metasearch will definitely provide you with the best airfare on international flights. We’re proud to partner with many reliable travel suppliers located outside the US what gives us an opportunity to offer the most competitive prices on far destinations.

Ontario — San Jose

from $61

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Ontario — Guadalajara

from $70

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Ontario — Mexico City

from $58

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Ontario — Cancun

from $74

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Ontario — Toronto

from $70

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Ontario — London

from $62

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Ontario — Vancouver

from $61

Find

How to book a plane ticket yourself?

Fill in the search parameters — cities of departure and destination, departure and return dates and click «Find flights»
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