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 United Airlines, Frontier 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 London, Calgary, Dublin, Manchester, New York, San Francisco, Glasgow, Chicago, Las Vegas, Toronto, Washington, D.C., Los Angeles, Buffalo, Riga, Austin, San Jose, Phoenix, Detroit, Houston, Vancouver.

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, New York, Bangkok, San Francisco, Sacramento, Taipei, Manila, Toronto, Calgary, Seattle, Las Vegas, San Jose, Orlando, Houston, Macau, Los Angeles, Washington, D.C., Guadalajara, Detroit, Oakland.

Question 6

Which airports are there in Denver?

Accepted Answer

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

Question 7

What airports are near Denver?

Accepted Answer

The main airport in Denver is Denver International. It is also served by Colorado Springs, Pueblo Memorial, Cheyenne Regional, Eagle County 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, Ontario International, John Wayne, Hollywood Burbank, Palm Springs International, Long Beach, Santa Barbara Municipal, Imperial County, Meadows Field.

Question 9

Is it possible to combine flights, buses, and trains in one itinerary when traveling between Denver and Ontario?

Accepted Answer

Yes, it's possible to combine different modes of transport between Denver and Ontario thanks to our Virtual Interlining technology. Making use of not only flights but also trains and buses between Denver and Ontario can give rise to new adventures. Read more about how Virtual Interlining works on Kiwi.com Stories.

Question 10

What is Virtual Interlining and how do I use it?

Accepted Answer

Virtual Interlining provides a revolutionary way of traveling. You can combine different modes of transport like flights, trains, and buses into one itinerary. And this often saves money. Thanks to the world's largest carrier database, the Kiwi.com search function enables anyone to mix and match different modes of transport easily.

Question 11

Which airlines fly between Denver and Ontario?

Accepted Answer

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

Question 12

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 13

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 14

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 Colorado Springs, Pueblo Memorial, Cheyenne Regional, Eagle County Regional, Laramie Regional

Question 15

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, Ontario International, John Wayne, Hollywood Burbank, Palm Springs International, Long Beach, Santa Barbara Municipal, Imperial County, Meadows Field.

Question 16

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 17

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 18

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 19

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	£27
Cheapest round-trip	£50
Average round-trip	£79
Nonstop flights in April	£27 – £255
Most popular airline	Frontier Airlines

Airline	Mon 15.04	Tue 16.04	Wed 17.04	Thu 18.04	Fri 19.04	Sat 20.04	Sun 21.04
United Airlines	2	2	2	2	1	2	2
Frontier Airlines	2	2	2	2	1	2	2

Airline	Mon 22.04	Tue 23.04	Wed 24.04	Thu 25.04	Fri 26.04	Sat 27.04	Sun 28.04
United Airlines	2	2	2	2	2	2	2
Frontier Airlines	2	2	2	2	2	2	2

Airline	Mon 29.04	Tue 30.04	Wed 01.05	Thu 02.05	Fri 03.05	Sat 04.05	Sun 05.05
United Airlines	2	2	2	2	2	2	2
Frontier Airlines	2	2	2	2	2	2	2

Airline	Mon 06.05	Tue 07.05	Wed 08.05	Thu 09.05	Fri 10.05	Sat 11.05	Sun 12.05
United Airlines	2	2	2	2	2	2	2
Frontier Airlines	2	2	2	2	2	2	2

Cheap flights from Denver, CO to Ontario, CA

Tips to know when travelling to Ontario

Cheapest one-way trip

Cheapest round-trip

Average round-trip

Nonstop flights in April

Most popular airline

Search by stops

Search by carrier

Search by price

Search by departure date

One-way trips

Round trips

Weekly direct flights

Weekly direct flights for Mon 15.04 - Sun 21.04

Weekly direct flights for Mon 22.04 - Sun 28.04

Weekly direct flights for Mon 29.04 - Sun 05.05

Weekly direct flights for Mon 06.05 - Sun 12.05

Check-in for a flight from Denver to Ontario

Ontario travel tips

Weather in Ontario

Average Weather

14 day forecast

Frequently asked questions

Explore alternative trips

Flights from Denver

Flights to Ontario

Popular routes

The nearest countries with flights to Ontario

Other destination countries from Denver

Airports near Denver

Airports near Ontario

Kiwi.com: the best free travel app for Android and iPhone

Company

Platform

Help & support

Features

Discover

Name	Carrier code	IATA Code	Passport needed during booking	Online check-in available
Frontier Airlines	FFT	F9	No	Opens 24 days before flight Closes 1 hours before flight
United Airlines	UAL	UA	Yes	No

1) Watch a few interesting exhibitions at the Chaffey Community Museum of Art in Ontario	Go to the Chaffey Community Museum of Art at 217 S Lemon Avenue in Ontario to get some inspiration. Exhibits always change there, but a few permanent ones are worth seeing. Check out the "Gem of the Foothills" that promotes the city's unique history and the "Road Ways" about American society.
2) Check out homemade desserts at Marie Callender's in Ontario	Head to 3505 Merrill Avenue in Ontario to try desserts with tasty homemade cream. There is an option for everyone: lemon meringue, chocolate cream, German chocolate, double cream blueberry, or custard.
3) Reveal the crime at the DoubleTree by Hilton in Ontario	Head to the DoubleTree by Hilton at 222 N Vineyard Avenue in Ontario to solve some mysteries during the dinner. This is where the largest interactive murder mystery comedy dinner show in the U.S. takes place. You will get a unique experience with popular professional actors.

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	13°C
June	29°C	16°C
July	33°C	19°C
August	33°C	20°C
September	32°C	18°C
October	27°C	15°C
November	22°C	10°C
December	17°C	7°C