United Airlines Ontario to Denver Flights

Return flight: Denver – Ontario

Cheapflightsplus.com will find cheap United Airlines flights from Ontario to Denver. Compare airline ticket prices and book air tickets starting from $69 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 may: one-way - $69, two-way – $118.
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Below is a detailed 2024 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 Arrival Flight Details Flight Time Price
1:35 pm — 4:45 pm
1:35 pm — 4:45 pm UA1635 United Airlines
Ontario — Denver
2h 10m
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from$69
5:45 am — 8:53 am
5:45 am — 8:53 am UA1852 United Airlines
Ontario — Denver
2h 8m
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from$88
5:45 am — 9:03 am
5:45 am — 9:03 am UA1422 United Airlines
Ontario — Denver
2h 18m
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from$419
11:49 am — 6:18 pm
11:49 am — 1:16 pm UA5228 United Airlines
Ontario — San Francisco
1h 28m stop
2:44 pm — 6:18 pm UA720 United Airlines
San Francisco — Denver
5h 29m
including layover
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from$177
11:50 am — 7:22 pm
11:50 am — 1:17 pm UA5228 United Airlines
Ontario — San Francisco
2h 33m stop
3:50 pm — 7:22 pm UA2242 United Airlines
San Francisco — Denver
6h 32m
including layover
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from$207
4:45 pm — 10:47 pm
4:45 pm — 6:12 pm UA5286 United Airlines
Ontario — San Francisco
1h 12m stop
7:24 pm — 10:47 pm UA1542 United Airlines
San Francisco — Denver
5h 2m
including layover
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from$92
4:45 pm — 11:56 pm
4:45 pm — 6:12 pm UA5286 United Airlines
Ontario — San Francisco
2h 18m stop
8:30 pm — 11:56 pm UA2362 United Airlines
San Francisco — Denver
6h 11m
including layover
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from$147
6:05 am — 2:18 pm
6:05 am — 7:31 am UA295 United Airlines
Ontario — San Francisco
3h 14m stop
10:45 am — 2:18 pm UA223 United Airlines
San Francisco — Denver
7h 13m
including layover
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from$92
6:05 am — 1:01 pm
6:05 am — 7:31 am UA295 United Airlines
Ontario — San Francisco
2h 2m stop
9:33 am — 1:01 pm UA431 United Airlines
San Francisco — Denver
5h 56m
including layover
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from$92
8:12 pm — 4:27 am
+1 day
8:12 pm — 9:39 pm UA5366 United Airlines
Ontario — San Francisco
3h 20m stop
0:59 am — 4:27 am F9670 Frontier Airlines
San Francisco — Denver
7h 15m
including layover
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from$244
9:29 am — 4:55 pm
9:29 am — 11:03 am UA5186 United Airlines
Ontario — San Francisco
2h 11m stop
1:14 pm — 4:55 pm UA1013 United Airlines
San Francisco — Denver
6h 26m
including layover
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from$130
9:29 am — 6:18 pm
9:29 am — 11:03 am UA5186 United Airlines
Ontario — San Francisco
3h 41m stop
2:44 pm — 6:18 pm UA720 United Airlines
San Francisco — Denver
7h 49m
including layover
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from$177
7:35 pm — 2:19 pm
+1 day
7:35 pm — 9:02 pm UA5366 United Airlines
Ontario — San Francisco
1h 36m stop
10:38 pm — 0:26 am UA522 United Airlines
San Francisco — Portland
10h 27m stop
10:53 am — 2:19 pm UA1164 United Airlines
Portland — Denver
17h 44m
including layover
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from$219
7:35 pm — 7:20 am
+1 day
7:35 pm — 9:02 pm UA5366 United Airlines
Ontario — San Francisco
1h 43m stop
10:45 pm — 4:44 am UA214 United Airlines
San Francisco — Chicago
56m stop
5:40 am — 7:20 am UA707 United Airlines
Chicago — Denver
10h 45m
including layover
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from$229
8:12 pm — 8:51 am
+1 day
8:12 pm — 9:39 pm UA5366 United Airlines
Ontario — San Francisco
1h 9m stop
10:48 pm — 0:36 am UA522 United Airlines
San Francisco — Portland
4h 54m stop
5:30 am — 8:51 am UA789 United Airlines
Portland — Denver
11h 39m
including layover
Find flight
from$256
*Departure and arrival times are local. Last updated on 05/02/2024

Flight Information

There are 3 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 11:49 am to 9:35 am. Nonstop flight is 2h 8m. The time difference between Ontario and Denver is 1h.

  • The fastest flight 2h 8m
  • Average flight time 2h 10m
  • The earliest flight 11:49 am
  • The latest flight 9:35 am
  • Distance 818 ml

The cheapest flight by United Airlines that our users were able to find is $69. This airfare is economy class on one-way UA1635 flight for October 3, 2018 leaving Ontario Int. in Ontario at 1:35 pm, it includes all taxes and additional fees.

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Other Popular Airlines on the Route

Besides United Airlines there are other 5 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 4 direct flights every day from Ontario. Airlines and fares are below:

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Connecting Flights

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

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How to book an air ticket yourself?

How to book an air 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 airfare.
  • 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.

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