United Airlines Ontario to Denver Flights

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Cheapflightsplus.com will find cheap United Airlines flights from Ontario to Denver. Compare airline ticket prices and book air tickets starting from $111 from trusted online travel agencies, web sites and directly from airlines. Check flights schedule of United Airlines, arrivals and departure details below.

Find Cheap Airfare Ontario (CA) — Denver (CO) by United Airlines

To find cheap tickets choose a day of your departure with attractive price on the graph below and click «Find flights». For round trip flights please click «Check prices for return flight». The cheapest airfare is in january: one-way - $111, two-way – $190.

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Cheap Flights from Ontario to Denver by United Airlines

Look at the list of plane tickets for the most popular direct and connecting flights by United Airlines, their prices start from $111. The fastest nonstop flight takes 2h 19m. The fastest connecting flight — 4h 56m.

Price	Departure	Arrival	Flight Time	Airline	Flight
from $111 Find flight	5:10 am Ontario Ontario Int.	8:29 am Denver Denver International	2h 19m	United Airlines	UA2317
from $111 Find flight	1:45 pm Ontario Ontario Int.	5:04 pm Denver Denver International	2h 19m	United Airlines	UA2278
from $133 Find flight	5:05 am Ontario Ontario Int.	8:24 am Denver Denver International	2h 19m	United Airlines	UA1575
from $133 Find flight	1:44 pm Ontario Ontario Int.	5:03 pm Denver Denver International	2h 19m	United Airlines	UA1942
from $121 Find flight	10:39 am Ontario Ontario Int.	7:40 pm Denver Denver International	8h 1m layover 3h 40m - San Francisco	United Airlines	UA4639 UA566
from $182 Find flight	6:15 am Ontario Ontario Int.	2:30 pm Denver Denver International	7h 15m layover 2h 58m - San Francisco	United Airlines	UA277 UA1986
from $184 Find flight	3:30 pm Ontario Ontario Int.	11:45 pm Denver Denver International	7h 15m layover 2h 51m - San Francisco	United Airlines	UA5660 UA624
from $184 Find flight	3:30 pm Ontario Ontario Int.	10:45 pm Denver Denver International	6h 15m layover 1h 51m - San Francisco	United Airlines	UA5660 UA2862
from $184 Find flight	3:30 pm Ontario Ontario Int.	9:45 pm Denver Denver International	5h 15m layover 0h 51m - San Francisco	United Airlines	UA5660 UA297
from $582 Find flight	6:00 am Ontario Ontario Int.	4:32 pm Denver Denver International	9h 32m layover 3h 47m - Houston	United Airlines	UA2360 UA241

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*Departure and arrival times are local. Prices are for one-way flights. Information refreshed on 01/15/2025

United Airlines Flight Schedule Ontario to Denver

Below is a detailed 2025 flight schedule for today, tomorrow and all other days. It may vary depending on season and a day of the week of your desired trip. We recommend booking your itinerary at least 2 weeks prior your travel to get the best price and availability by the airline.

Departure	Flight Details	Flight Time	Price
10:36 am — 6:05 pm	10:39 am — 12:20 pm UA4639 United Airlines Ontario — San Francisco 2h 5m stop 2:35 pm — 6:15 pm UA1691 United Airlines San Francisco — Denver	6h 29m including layover	Find flight from$287
10:39 am — 7:40 pm	10:35 am — 12:08 pm UA4639 United Airlines Ontario — San Francisco 3h 40m stop 4:00 pm — 7:40 pm UA566 United Airlines San Francisco — Denver	8h 1m including layover	Find flight from$121
10:39 am — 4:35 pm	10:39 am — 12:20 pm UA4639 United Airlines Ontario — San Francisco 35m stop 12:55 pm — 4:35 pm UA1791 United Airlines San Francisco — Denver	4h 56m including layover	Find flight from$212
10:39 am — 9:15 pm	10:35 am — 12:08 pm UA4639 United Airlines Ontario — San Francisco 5h 15m stop 6:15 pm — 9:52 pm UA297 United Airlines San Francisco — Denver	9h 36m including layover	Find flight from$284
10:39 am — 10:45 pm	10:39 am — 12:20 pm UA4639 United Airlines Ontario — San Francisco 6h 45m stop 7:10 pm — 10:50 pm UA2862 United Airlines San Francisco — Denver	11h 6m including layover	Find flight from$284
1:44 pm — 5:03 pm	1:44 pm — 5:03 pm UA1942 United Airlines Ontario — Denver	2h 19m	Find flight from$133
1:45 pm — 5:04 pm	1:45 pm — 5:04 pm UA2278 United Airlines Ontario — Denver	2h 19m	Find flight from$111
3:30 pm — 11:45 pm	3:30 pm — 5:14 pm UA5660 United Airlines Ontario — San Francisco 2h 51m stop 8:05 pm — 11:45 pm UA624 United Airlines San Francisco — Denver	7h 15m including layover	Find flight from$184
3:30 pm — 10:45 pm	3:30 pm — 5:14 pm UA5660 United Airlines Ontario — San Francisco 1h 51m stop 7:05 pm — 10:45 pm UA2862 United Airlines San Francisco — Denver	6h 15m including layover	Find flight from$184
3:30 pm — 9:45 pm	3:30 pm — 5:14 pm UA5660 United Airlines Ontario — San Francisco 51m stop 6:05 pm — 9:45 pm UA297 United Airlines San Francisco — Denver	5h 15m including layover	Find flight from$184
5:05 am — 8:24 am	5:05 am — 8:24 am UA1575 United Airlines Ontario — Denver	2h 19m	Find flight from$133
5:10 am — 8:29 am	5:10 am — 8:29 am UA2317 United Airlines Ontario — Denver	2h 19m	Find flight from$111
6:00 am — 4:32 pm	6:00 am — 11:03 am UA2360 United Airlines Ontario — Houston 3h 47m stop 2:50 pm — 4:32 pm UA241 United Airlines Houston — Denver	9h 32m including layover	Find flight from$582
6:00 am — 2:26 pm	6:00 am — 11:03 am UA2360 United Airlines Ontario — Houston 1h 37m stop 12:40 pm — 2:26 pm UA1333 United Airlines Houston — Denver	7h 26m including layover	Find flight from$582
6:15 am — 2:30 pm	6:00 am — 7:26 am UA277 United Airlines Ontario — San Francisco 2h 58m stop 11:00 am — 2:40 pm UA1986 United Airlines San Francisco — Denver	7h 15m including layover	Find flight from$182
6:15 am — 12:16 pm	6:00 am — 7:26 am UA277 United Airlines Ontario — San Francisco 44m stop 9:00 am — 12:40 pm UA1625 United Airlines San Francisco — Denver	5h 1m including layover	Find flight from$182
6:15 am — 9:15 pm	6:00 am — 7:26 am UA277 United Airlines Ontario — San Francisco 9h 49m stop 6:15 pm — 9:52 pm UA297 United Airlines San Francisco — Denver	14h including layover	Find flight from$284
6:15 am — 7:40 pm	6:00 am — 7:26 am UA277 United Airlines Ontario — San Francisco 8h 14m stop 4:00 pm — 7:40 pm UA566 United Airlines San Francisco — Denver	12h 25m including layover	Find flight from$284
6:15 am — 6:20 pm	6:15 am — 7:46 am UA277 United Airlines Ontario — San Francisco 6h 54m stop 2:40 pm — 6:20 pm UA1691 United Airlines San Francisco — Denver	11h 5m including layover	Find flight from$284
6:15 am — 10:45 pm	6:15 am — 7:46 am UA277 United Airlines Ontario — San Francisco 11h 19m stop 7:05 pm — 10:45 pm UA2862 United Airlines San Francisco — Denver	15h 30m including layover	Find flight from$284
6:15 am — 7:36 pm	6:15 am — 7:46 am UA277 United Airlines Ontario — San Francisco 49m stop 8:35 am — 11:27 am UA5212 United Airlines San Francisco — Boise 6h 10m stop 5:37 pm — 7:36 pm UA395 United Airlines Boise — Denver	12h 21m including layover	Find flight from$294
6:15 am — 5:02 pm	6:15 am — 7:46 am UA277 United Airlines Ontario — San Francisco 49m stop 8:35 am — 9:46 am UA277 United Airlines San Francisco — Reno 3h 59m stop 1:45 pm — 5:02 pm UA1762 United Airlines Reno — Denver	9h 47m including layover	Find flight from$455

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

*Departure and arrival times are local. Last updated on 01/15/2025

Flight Information

There are 4 flights by United Airlines from Ontario to Denver every week with departures from Ontario Int. and International Heliport. All flights arrive at Denver International and Arapahoe Co.

Departures start from 10:36 am to 6:15 am. Nonstop flight is 2h 19m. The time difference between Ontario and Denver is 1h.

The fastest flight 2h 19m
Average flight time 2h 19m
The earliest flight 10:36 am
The latest flight 6:15 am
Distance 818 ml

The cheapest months for traveling to Denver are january (from 111 $), february (from 111 $), november (from 149 $).

The most expensive and popular months are december (from 203 $), november (from 149 $), february (from 111 $).

The cheapest flight by United Airlines that our users were able to find is $111. This airfare is economy class on one-way UA2317 flight for January 22, 2025 leaving Ontario Int. in Ontario at 5:10 am, it includes all taxes and additional fees.

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United Airlines Airplanes on the Route

List of the most popular United Airlines airplanes flying from Ontario to Denver:

Other Popular Airlines on the Route

Besides United Airlines there are other 3 airline carriers between Ontario and Denver. Please review schedules and prices from the most popular airlines to find the best airfare deals from Ontario to Denver.

Nonstop flights

There are 5 direct flights every day from Ontario. Airlines and fares are below:

F9 - Frontier Airlines

from $43

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See more direct flights

Connecting Flights

List of flights with layovers (1 and more stops):

AS - Alaska Airlines

from $120

Find
F9 - Frontier Airlines

from $55

Find
Y4 - Volaris

from $351

Find

See more connecting flights

How to book an air ticket yourself?

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