Cheap flights from Ontario, CA to Denver, CO

Flights starting at £34. Choose between United Airlines, Frontier Airlines, or Alaska Airlines to find the best price.

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The distance between Ontario and Denver is 1317 km. The most popular airlines for this route are United Airlines, Frontier Airlines, and Alaska Airlines. Ontario and Denver have 44 direct flights per week.

Weekly direct flights

Discover the top airlines offering direct flights from Ontario to Denver in the next month. You’ll find the number of daily direct flights per airline in the table.

Weekly direct flights for Mon 10.06 - Sun 16.06

AirlineMon 10.06Tue 11.06Wed 12.06Thu 13.06Fri 14.06Sat 15.06Sun 16.06
3333323
3222311

Weekly direct flights for Mon 17.06 - Sun 23.06

AirlineMon 17.06Tue 18.06Wed 19.06Thu 20.06Fri 21.06Sat 22.06Sun 23.06
3333323
1222322

Weekly direct flights for Mon 24.06 - Sun 30.06

AirlineMon 24.06Tue 25.06Wed 26.06Thu 27.06Fri 28.06Sat 29.06Sun 30.06
3333333
2211312

Weekly direct flights for Mon 01.07 - Sun 07.07

AirlineMon 01.07Tue 02.07Wed 03.07Thu 04.07Fri 05.07Sat 06.07Sun 07.07
3442243
3222322

Check-in for a flight from Ontario to Denver

NameCarrier codeIATA CodePassport needed during bookingOnline check-in available
United AirlinesUALUAYesNo
Frontier AirlinesFFTF9NoOpens 24 days before flight
Closes 1 hours before flight
Alaska AirlinesASAASNoOpens 24 days before flight
Closes 1 hours before flight

Weather in Denver

Average Weather

MonthAverage monthly max temperatureAverage monthly min temperature
January4°C-6°C
February4°C-6°C
March10°C-2°C
April14°C1°C
May18°C6°C
June26°C12°C
July29°C16°C
August28°C15°C
September25°C11°C
October17°C4°C
November10°C-1°C
December4°C-6°C
Hottest Month
29°C
July
Coldest month
-6°C
January
Sunny days
260
days per year
Snow days
28
days per year

14 day forecast

Monday
10 Jun
83%
30°C17°C
17 Jun
89%
24°C18°C
Tuesday
11 Jun
79%
32°C17°C
18 Jun
36°C16°C
Wednesday
12 Jun
88%
35°C19°C
19 Jun
36°C20°C
Thursday
13 Jun
37°C19°C
20 Jun
69%
31°C18°C
Friday
14 Jun
72%
33°C19°C
21 Jun
76%
28°C18°C
Saturday
15 Jun
33°C18°C
22 Jun
35°C19°C
Sunday
16 Jun
36°C20°C
23 Jun
40°C21°C

Frequently asked questions

How long does it take to travel from Ontario to Denver?
What is the flight distance between Ontario and Denver?
What airlines offer nonstop (direct) flights between Ontario and Denver?
What are the most popular routes to and from Ontario?
What are the most popular routes to and from Denver?
What airports are near Ontario?
What airports are near Denver?
Is it possible to combine flights, buses, and trains in one itinerary when traveling between Ontario and Denver?
What is Virtual Interlining and how do I use it?
Which airlines fly between Ontario and Denver?
When's the best time to travel between Ontario and Denver?
What flights operate between Ontario and Denver?
How many airports are there near Ontario?
How many airports are there near Denver?
What time do nonstop (direct) flights between Ontario and Denver depart?
What time do nonstop (direct) flights between Ontario and Denver arrive?
What time do flights between Ontario and Denver depart?
What time do flights between Ontario and Denver arrive?

Explore alternative trips

Flights from Ontario

Flights to Denver

Popular routes

The nearest countries with flights to Denver

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Other destination countries from Ontario

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