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

One way Round trip

Adults

Children under 12

Infants under 2 without place

Economy

Business

First

done

Return flight: Ontario – Denver

Page navigation

Price Calendar Cheap Flights Flights Schedule

On Cheapflightsplus.com you will find 3 direct and 65 connecting flights from Denver to Ontario. You can compare airfare deals from 5 airlines and multiple travel sites from $43, book and save on cheap plane tickets and last minute offers. Also check out DEN-ONT flight schedule to find best flight time, convenient departure and arrival airports.

Find One-Way and Round-Trip Denver to Ontario 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).

Direct flights

Check to choose departure date Check to choose departure date

Check prices for return flight

Find flights

Best Flights from Denver to Ontario Today

Take a look at the list of non stop flights and flights with layovers from Denver to Ontario with the lowest price of $43. The fastest direct flight takes 2h 19m and the fastest connecting – 4h 36m.

Price	Departure	Arrival	Flight Duration	Airline	Flight
from $43 Find flight	22:20 Denver Denver International	23:39 Ontario Ontario Int.	2h 19m	Frontier Airlines	F91499
from $43 Find flight	18:15 Denver Denver International	19:37 Ontario Ontario Int.	2h 22m	Frontier Airlines	F92907
from $133 Find flight	19:28 Denver Denver International	20:55 Ontario Ontario Int.	2h 27m	United Airlines	UA351
from $48 Find flight	14:00 Denver Denver International	17:36 Ontario Ontario Int.	4h 36m layover 1h 18m - Las Vegas	Frontier Airlines	F92349 F92231
from $54 Find flight	07:00 Denver Denver International	15:02 Ontario Ontario Int.	9h 2m layover 5h 37m - Las Vegas	Frontier Airlines	F9777 F94205
from $54 Find flight	19:39 Denver Denver International	07:11+1 день Ontario Ontario Int.	12h 32m layover 9h 17m - Las Vegas	Frontier Airlines	F94967 F94757
from $54 Find flight	07:00 Denver Denver International	19:09 Ontario Ontario Int.	13h 9m layover 9h 48m - Las Vegas	Frontier Airlines	F9777 F92231
from $55 Find flight	07:00 Denver Denver International	11:43 Ontario Ontario Int.	5h 43m layover 2h 22m - Las Vegas	Frontier Airlines	F9777 F94757
from $57 Find flight	22:41 Denver Denver International	07:06+1 день Ontario Ontario Int.	9h 25m layover 6h 9m - Las Vegas	Frontier Airlines	F94611 F91283
from $61 Find flight	22:15 Denver Denver International	18:06+1 день Ontario Ontario Int.	20h 51m layover 17h 17m - Salt Lake City	Frontier Airlines	F94251 F93343
from $82 Find flight	22:16 Denver Denver International	06:36+1 день Ontario Ontario Int.	9h 20m layover 5h 17m - San Francisco	Frontier Airlines	F93439 F92678
from $82 Find flight	19:39 Denver Denver International	15:02+1 день Ontario Ontario Int.	20h 23m layover 17h 3m - Las Vegas	Frontier Airlines	F94967 F94205
from $93 Find flight	10:00 Denver Denver International	17:06 Ontario Ontario Int.	8h 6m layover 4h 45m - Salt Lake City	Frontier Airlines	F93981 F93343
from $93 Find flight	05:01 Denver Denver International	17:06 Ontario Ontario Int.	13h 5m layover 9h 43m - Salt Lake City	Frontier Airlines	F93861 F93343
from $121 Find flight	13:34 Denver Denver International	18:04 Ontario Ontario Int.	5h 30m layover 1h 10m - San Francisco	United Airlines	UA304 UA251
from $121 Find flight	11:33 Denver Denver International	18:04 Ontario Ontario Int.	7h 31m layover 3h 12m - San Francisco	United Airlines	UA1561 UA251

Show all tickets

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

Flight Schedule Denver (Colorado) to Ontario (California)

Full flight schedule will help you in detecting at what time planes fly from Denver to Ontario. 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
18:15 — 19:37	18:15 — 19:37 F92907 Frontier Airlines Denver — Ontario	2h 22m	Find flight from$43
19:28 — 20:55	19:28 — 20:55 UA351 United Airlines Denver — Ontario	2h 27m	Find flight from$133
22:20 — 23:39	22:20 — 23:39 F91499 Frontier Airlines Denver — Ontario	2h 19m	Find flight from$43
05:01 — 17:06	05:01 — 06:36 F93861 Frontier Airlines Denver — Salt Lake City 9h 43m stop 16:19 — 17:06 F93343 Frontier Airlines Salt Lake City — Ontario	13h 5m including layover	Find flight from$93
06:00 — 18:04	06:00 — 07:50 UA573 United Airlines Denver — San Francisco 8h 45m stop 16:35 — 18:04 UA251 United Airlines San Francisco — Ontario	13h 4m including layover	Find flight from$284
07:00 — 15:02	07:00 — 08:07 F9777 Frontier Airlines Denver — Las Vegas 5h 37m stop 18:55 — 19:59 F94205 Frontier Airlines Las Vegas — Ontario	9h 2m including layover	Find flight from$54
07:00 — 19:09	07:00 — 08:14 F9777 Frontier Airlines Denver — Las Vegas 9h 48m stop 18:02 — 19:09 F92231 Frontier Airlines Las Vegas — Ontario	13h 9m including layover	Find flight from$54
08:54 — 15:58	08:54 — 10:50 F91819 Frontier Airlines Denver — Phoenix 4h 55m stop 15:45 — 15:58 F91625 Frontier Airlines Phoenix — Ontario	8h 4m including layover	Find flight from$216
09:00 — 13:01	06:00 — 07:09 F92015 Frontier Airlines Denver — Las Vegas 1h 53m stop 16:44 — 17:51 F91357 Frontier Airlines Las Vegas — Ontario	5h 1m including layover	Find flight from$232
09:05 — 18:04	09:05 — 10:56 UA538 United Airlines Denver — San Francisco 5h 39m stop 16:35 — 18:04 UA251 United Airlines San Francisco — Ontario	9h 59m including layover	Find flight from$284
10:00 — 17:06	08:08 — 09:50 F93981 Frontier Airlines Denver — Salt Lake City 4h 45m stop 17:15 — 18:06 F93343 Frontier Airlines Salt Lake City — Ontario	8h 6m including layover	Find flight from$93
10:15 — 18:04	10:15 — 12:04 UA2041 United Airlines Denver — San Francisco 4h 31m stop 16:35 — 18:04 UA251 United Airlines San Francisco — Ontario	8h 49m including layover	Find flight from$284
11:20 — 18:05	11:20 — 13:17 UA1561 United Airlines Denver — San Francisco 3h 20m stop 16:37 — 18:05 UA1932 United Airlines San Francisco — Ontario	7h 45m including layover	Find flight from$248
11:33 — 18:04	11:33 — 13:23 UA1561 United Airlines Denver — San Francisco 3h 12m stop 16:35 — 18:04 UA251 United Airlines San Francisco — Ontario	7h 31m including layover	Find flight from$121
12:04 — 10:38 +1 day	12:04 — 14:17 AS682 Alaska Airlines Denver — Seattle 17h 43m stop 08:00 — 10:38 AS1254 Alaska Airlines Seattle — Ontario	23h 34m including layover	Find flight from$180
12:38 — 18:19	12:04 — 14:17 AS682 Alaska Airlines Denver — Seattle 1h 4m stop 15:40 — 18:13 AS1086 Alaska Airlines Seattle — Ontario	6h 41m including layover	Find flight from$161
13:20 — 07:06 +1 day	13:52 — 15:03 F92349 Frontier Airlines Denver — Las Vegas 15h 27m stop 13:56 — 15:06 F91283 Frontier Airlines Las Vegas — Ontario	18h 46m including layover	Find flight from$57
13:34 — 18:04	13:34 — 15:25 UA304 United Airlines Denver — San Francisco 1h 10m stop 16:35 — 18:04 UA251 United Airlines San Francisco — Ontario	5h 30m including layover	Find flight from$121
14:00 — 17:36	13:20 — 14:33 F92349 Frontier Airlines Denver — Las Vegas 1h 18m stop 13:51 — 15:02 F92231 Frontier Airlines Las Vegas — Ontario	4h 36m including layover	Find flight from$48
14:49 — 11:05 +1 day	14:07 — 15:52 AS350 Alaska Airlines Denver — Portland 16h 5m stop 08:13 — 10:34 AS3312 Alaska Airlines Portland — Ontario	21h 16m including layover	Find flight from$172
15:50 — 20:40	15:50 — 17:45 UA1300 United Airlines Denver — San Francisco 1h 25m stop 19:10 — 20:40 UA794 United Airlines San Francisco — Ontario	5h 50m including layover	Find flight from$248
15:59 — 09:58 +1 day	15:59 — 17:50 UA1300 United Airlines Denver — San Francisco 14h 35m stop 08:25 — 09:58 UA5740 United Airlines San Francisco — Ontario	18h 59m including layover	Find flight from$284
16:45 — 10:38 +1 day	16:45 — 18:50 AS615 Alaska Airlines Denver — Seattle 13h 10m stop 08:00 — 10:38 AS1254 Alaska Airlines Seattle — Ontario	18h 53m including layover	Find flight from$180
16:45 — 15:16 +1 day	16:45 — 18:50 AS615 Alaska Airlines Denver — Seattle 17h 55m stop 12:45 — 15:16 AS1097 Alaska Airlines Seattle — Ontario	23h 31m including layover	Find flight from$180
19:39 — 07:11 +1 day	18:34 — 19:38 F94967 Frontier Airlines Denver — Las Vegas 9h 17m stop 07:30 — 08:33 F94757 Frontier Airlines Las Vegas — Ontario	12h 32m including layover	Find flight from$54
19:39 — 15:02 +1 day	18:33 — 19:37 F94967 Frontier Airlines Denver — Las Vegas 17h 3m stop 16:35 — 17:42 F94205 Frontier Airlines Las Vegas — Ontario	20h 23m including layover	Find flight from$82
21:59 — 15:02 +1 day	19:31 — 20:41 F94611 Frontier Airlines Denver — Las Vegas 14h 39m stop 18:55 — 19:59 F94205 Frontier Airlines Las Vegas — Ontario	18h 3m including layover	Find flight from$82
21:59 — 19:59 +1 day	21:59 — 23:12 F94611 Frontier Airlines Denver — Las Vegas 19h 40m stop 18:52 — 19:59 F92233 Frontier Airlines Las Vegas — Ontario	23h including layover	Find flight from$163
22:41 — 07:06 +1 day	22:41 — 23:54 F94611 Frontier Airlines Denver — Las Vegas 6h 9m stop 13:56 — 15:06 F91283 Frontier Airlines Las Vegas — Ontario	9h 25m including layover	Find flight from$57
17:08 — 23:58	17:08 — 19:10 AS615 Alaska Airlines Denver — Seattle 45m stop 19:55 — 20:50 AS958 Alaska Airlines Seattle — Portland 54m stop 21:44 — 23:58 AS1066 Alaska Airlines Portland — Ontario	7h 50m including layover	Find flight from$265
17:25 — 09:58 +1 day	17:25 — 19:01 UA331 United Airlines Denver — Salt Lake City 11h 4m stop 06:05 — 07:46 UA5736 United Airlines Salt Lake City — San Francisco 39m stop 08:25 — 09:58 UA5740 United Airlines San Francisco — Ontario	17h 33m including layover	Find flight from$283
18:30 — 09:58 +1 day	18:30 — 20:12 UA5762 United Airlines Denver — Salt Lake City 9h 53m stop 06:05 — 07:46 UA5736 United Airlines Salt Lake City — San Francisco 39m stop 08:25 — 09:58 UA5740 United Airlines San Francisco — Ontario	16h 28m including layover	Find flight from$283
20:50 — 09:58 +1 day	20:50 — 22:30 UA5665 United Airlines Denver — Salt Lake City 7h 35m stop 06:05 — 07:46 UA5736 United Airlines Salt Lake City — San Francisco 39m stop 08:25 — 09:58 UA5740 United Airlines San Francisco — Ontario	14h 8m including layover	Find flight from$303

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 Denver to Ontario depends on and how to choose the most interesting flight option for you.

Distance between Denver and Ontario is 1316 miles. Time difference between the cities is 1h. Airplanes depart 05:01 to 22:41 from 2 Denver airports and arrive 05:01 to 22:41 to 2 Ontario airports. Average flight time is 2h 22m.

The fastest flight 2h 19m
Average flight time 2h 22m
The earliest flight 05:01
The latest flight 22:41
Distance 818 ml

The cheapest months to travel to Ontario are november (from 29 $), february (from 43 $), january (from 55 $).

The most expensive months are december (from 65 $), january (from 55 $), february (from 43 $).

What is the lowest airfare Denver to Ontario?

The cheapest plane ticket found by our users is $43. This airfare is for economy class on one-way F91499 flight by Frontier Airlines for February 21, 2025 which leaves Denver International in Denver at 22:20 am and arrives at Ontario Ontario Int. at 23:39.

Economy class

$43

Find

Business class

Find

First class

Find

Popular Airlines on the Route

The flight Denver — Ontario is served by 5 regular airlines and 2 low-cost airlines. Most of the flights on this route are operated by Alaska Airlines - 19 departures per week at the price of from $ 159 . And the most expensive tickets are offered by United Airlines airline - from $ 582.

Direct flights

There are 3 nonstop flights on the route. The fastest direct flight is F91499 by Frontier Airlines takes 2h 19m and the cheapest is F91499 by Frontier Airlines for $43.

F9 - Frontier Airlines

from $43

Find
UA - United Airlines

from $133

Find

See more direct flights

Connecting Flights

There are 65 flights with layovers on the route. The fastest connecting flight is F92349 by Frontier Airlines takes 4h 36m and the cheapest is F91499 by Frontier Airlines for $48.

AS - Alaska Airlines

from $159

Find
F9 - Frontier Airlines

from $48

Find
UA - United Airlines

from $121

Find
Y4 - Volaris

from $360

Find
AM - Aeromexico

from $363

Find

See more connecting flights

Airports

You can fly from Denver to Ontario from 2 airports (Denver International, Arapahoe Co).

Denver airports

Denver International-DEN

from $43
Find
Arapahoe Co-APA

Find

Ontario airports

Ontario Int.-ONT

Find
International Heliport-JIO

Find

Airplanes

There are flights to Ontario from Denver by 5 airlines that use 0 aircraft brands. They range from huge modern airplanes to small-sized.

Top Domestic Destinations from Denver

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

Denver — Chicago

from $66

Find
Denver — Phoenix

from $59

Find
Denver — Indianapolis

from $79

Find
Denver — Las Vegas

from $70

Find
Denver — Boston

from $68

Find
Denver — Tampa

from $57

Find
Denver — Omaha

from $64

Find
Denver — Houston

from $67

Find
Denver — Boise

from $77

Find
Denver — San Diego

from $78

Find

Top International Destinations from Denver

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.

Denver — London

from $63

Find
Denver — Paris

from $75

Find
Denver — Vancouver

from $60

Find
Denver — Cancun

from $66

Find
Denver — Birmingham

from $71

Find
Denver — Zurich

from $64

Find
Denver — Puerto Vallarta

from $56

Find
Denver — Athens

from $54

Find
Denver — Manchester

from $79

Find
Denver — Frankfurt

from $70

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»
Select the best flight that you like. Please, check the airports of departure and arrival. Select the best fare, but pay attention to the following flight details - airports of departure and arrival, flight duration and layovers. Please use filters and sort to find the best flight.
Click «Buy» when you are ready — our system will redirect you to the site that sells the selected flight ticket.
Fill in all passenger and payment information — passport and contact information, please double check all passengers’ names and make a payment for your itinerary.
That's it — you will receive an email with your e-ticket usually within 10 minutes after your flight is confirmed. Please, print the e-ticket and have it with you at the airport. You would need to have only a passport and/or a required form of ID to travel. Please, check your Visa requirements if you travel outside of the United States or Canada.
To find a plane ticket, please select dates.