Question 1

How long does it take to travel from Denver to Ontario?

Accepted Answer

A one-way nonstop (direct) flight between Denver and Ontario takes around 2.4 hours.

Question 2

What is the flight distance between Denver and Ontario?

Accepted Answer

The flight distance between Denver and Ontario is 1317 km.

Question 3

What airlines offer nonstop (direct) flights between Denver and Ontario?

Accepted Answer

Several carriers operate flights between Denver and Ontario. Airlines offering nonstop (direct) flights include Frontier Airlines, United Airlines.

Question 4

What are the most popular routes to and from Denver?

Accepted Answer

Travelers frequently search for route combinations, such as Denver and Mexico City, London, Guadalajara, Los Angeles, Vancouver, Cancún, Tokyo, Edinburgh, Las Vegas, New York, Puerto Escondido, Oaxaca, Toronto, Houston, Monterrey, Washington, D.C., Chicago, San Francisco, Medellín, Phoenix, Chihuahua.

Question 5

What are the most popular routes to and from Ontario?

Accepted Answer

Travelers frequently search for route combinations, such as Ontario and London, San Francisco, Guadalajara, Las Vegas, Seattle, Dallas, Houston, Sacramento, Portland, Atlanta, Chicago, Los Angeles, New York, Toronto, Calgary, Vancouver, Mexico City, Edmonton, Washington, D.C., Orlando.

Question 6

Which airports are there in Denver?

Accepted Answer

Denver is mainly served by Denver International. But there are other airports nearby, including Centennial Airport, Rocky Mountain Metropolitan Airport.

Question 7

What airports are near Denver?

Accepted Answer

The main airport in Denver is Denver International. It is also served by Eagle County Regional, Colorado Springs, Pueblo Memorial, Cheyenne Regional, Laramie Regional.

Question 8

What airports are near Ontario?

Accepted Answer

The main airport in Ontario is Ontario International. It is also served by Tijuana International, San Diego International, John Wayne, Ontario International, Hollywood Burbank, Palm Springs International, Santa Barbara Municipal, Long Beach, McClellan–Palomar, Meadows Field.

Question 9

Which airlines fly between Denver and Ontario?

Accepted Answer

Currently, you can fly between Denver and Ontario with Frontier Airlines, United Airlines, Alaska Airlines.

Question 10

When’s the best time to travel between Denver and Ontario?

Accepted Answer

If you don’t have specific dates for your trip between Denver and Ontario, you can enter a date range into the departure and return fields. Most carriers on the Kiwi.com website allow you to search and book up to six months from the day of your search. Order the search results by the best, cheapest, or fastest route, or find the cheapest outbound and return combination in the pricing table.

Question 11

What flights operate between Denver and Ontario?

Accepted Answer

Traveling between Denver and Ontario, you can choose between direct (nonstop) flights or flights with one or more stops. You can select the number of stops on your journey, including an overnight stopover, and the duration of the stopover. What’s more, you can also select where you want to have your stopover. Want to say "Hi" to a friend in another city en route to your destination? Or fancy a quick round of shopping? Go Multi-City or Nomad and add places to your search that you wish to visit.

Question 12

How many airports are there near Denver?

Accepted Answer

There are a number of airports in and around Denver. The main one is Denver International and other nearby airports include Eagle County Regional, Colorado Springs, Pueblo Memorial, Cheyenne Regional, Laramie Regional

Question 13

How many airports are there near Ontario?

Accepted Answer

There are a number of airports in and around Ontario. The main one is Ontario International and other nearby airports include Tijuana International, San Diego International, John Wayne, Ontario International, Hollywood Burbank, Palm Springs International, Santa Barbara Municipal, Long Beach, McClellan–Palomar, Meadows Field.

Question 14

What time do nonstop (direct) flights between Denver and Ontario depart?

Accepted Answer

This depends on the airline’s flight schedule. You can easily select your preferred departure time when you search on our website or mobile app. Choose the time of day you wish to depart from Denver, such as morning, afternoon, evening, or night, or select the exact hours for departure.

Question 15

What time do nonstop (direct) flights between Denver and Ontario arrive?

Accepted Answer

This depends on the airline’s flight schedule. You can easily select your preferred arrival time when you search on our website or mobile app. Choose the time of day you wish to arrive at Ontario, such as morning, afternoon, evening, or night, or select the exact hours for arrival.

Question 16

What time do flights between Denver and Ontario depart?

Accepted Answer

This depends on the airline’s flight schedule. You can easily select your preferred departure time when you search on our website or mobile app. Choose the time of day you wish to depart from Denver, such as morning, afternoon, evening, or night, or select the exact hours for departure.

Question 17

What time do flights between Denver and Ontario arrive?

Accepted Answer

This depends on the airline’s flight schedule. You can easily select your preferred arrival time when you search on our website or mobile app. Choose the time of day you wish to arrive at Ontario, such as morning, afternoon, evening, or night, or select the exact hours for arrival.

Cheapest one-way trip	£36
Cheapest nonstop round-trip	£215
Cheapest round-trip	£133
Average round-trip	£240
Nonstop flights in June	£134 – £210

Airline	Mon 08.06	Tue 09.06	Wed 10.06	Thu 11.06	Fri 12.06	Sat 13.06	Sun 14.06
United Airlines	3	2	3	3	3	2	3
Frontier Airlines	2	2	2	2	2	2	2
Weekly flights: 33 total	Daily flights: 4.71 average	Most flights: Monday 3 flights

Airline	Mon 15.06	Tue 16.06	Wed 17.06	Thu 18.06	Fri 19.06	Sat 20.06	Sun 21.06
United Airlines	3	2	3	3	3	2	3
Frontier Airlines	2	2	2	2	2	2	2
Weekly flights: 33 total	Daily flights: 4.71 average	Most flights: Monday 3 flights

Airline	Mon 22.06	Tue 23.06	Wed 24.06	Thu 25.06	Fri 26.06	Sat 27.06	Sun 28.06
United Airlines	3	2	3	2	2	2	2
Frontier Airlines	2	2	2	2	2	2	2
Weekly flights: 30 total	Daily flights: 4.29 average	Most flights: Monday 3 flights

Airline	Mon 29.06	Tue 30.06	Wed 01.07	Thu 02.07	Fri 03.07	Sat 04.07	Sun 05.07
United Airlines	2	2	2	2	2	1	2
Frontier Airlines	2	2	2	2	2	2	2
Weekly flights: 27 total	Daily flights: 3.86 average	Most flights: Monday 2 flights

Cheap flights from Denver to Ontario from £36

Explore flight deals to Ontario

Not happy with the results? Try some of our useful filters

Search by stops

Search by carrier

Search by price

Search by departure date

Not happy with the results? Try some of our useful filters

Search by stops

Search by carrier

Search by price

Search by departure date

How much do flights to Ontario cost?

Cheapest one-way trip

Cheapest nonstop round-trip

Cheapest round-trip

Average round-trip

Nonstop flights in June

Key info about flying to Ontario

Weekly direct flights

Check-in for a flight from Denver to Ontario

Weather in Ontario

Average Weather

14 day forecast

Ontario travel tips

Watch a few interesting exhibitions at the Chaffey Community Museum of Art in Ontario

Check out homemade desserts at Marie Callender's in Ontario

Reveal the crime at the DoubleTree by Hilton in Ontario

Frequently asked questions

Explore alternative trips

Start your next adventure now. Download our app and explore cheap flights effortlessly!

Company

Platform

Features

Discover

Name	Carrier code	IATA Code	Passport needed during booking
Frontier Airlines	FFT	F9	No
United Airlines	UAL	UA	No
Alaska Airlines	ASA	AS	No

Month	Average monthly max temperature	Average monthly min temperature
January	18°C	7°C
February	18°C	7°C
March	20°C	8°C
April	23°C	10°C
May	25°C	12°C
June	29°C	16°C
July	32°C	19°C
August	33°C	20°C
September	31°C	18°C
October	27°C	14°C
November	22°C	10°C
December	17°C	7°C