Cheap Flights from Denver to Ontario International

Compare Denver to Ontario International flight deals

Find the cheapest month or even day of the year to fly to Ontario International

Book the best Ontario International fare with no extra fees

Flight deals from Denver to Ontario International

Looking for a cheap last-minute deal or the best return flight from Denver to Ontario International? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Denver to Ontario International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Denver to Ontario International flights are currently cheapest in November.

Direct flights from Denver to Ontario International

Denver to Ontario International: Alternative routes

Compare routes from Denver to Ontario below. You may find an airport to fly into that's cheaper, faster, or easier than Ontario International.

Denver to Ontario: Flight information

The things to know before you go.
Cheapest flight foundج.م.‏ 1,418
Cheapest month to flyNovember
Average flight time2 hrs, 25 mins
Most popular airlineSouthwest Airlines
Average flights per week78

Finding cheap flights from Denver to Ontario International: Frequently asked questions

The best price we found for a return flight from Denver to Ontario International is ج.م.‏ 2,836. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
2 hours and 25 minutes is the average flight time from Denver to Ontario International.
Southwest Airlines, Air Canada and United fly direct from Denver to Ontario International.
As of November 2024, there are 78 flights per week flying from Denver to Ontario International.
The cheapest month to fly from Denver to Ontario International is usually November 2024.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Denver to Ontario International Airport on Wednesday, 13 November 2024.
Yes – the average flight time is 2 hours and 25 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Ontario International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
The cheapest airline that flies to Ontario International is Frontier Airlines .

How to find cheap flights to Ontario International from Denver

Looking for cheap tickets from Denver to Ontario International? Here are a few tips on how to secure the best flight price and make your journey as smooth as possible.

  • Simply hit 'search'. From British Airways to international carriers like Emirates, we compare all major airlines along with the most popular online travel agents to find the cheapest plane tickets from Denver to Ontario International. And with us there are no hidden fees - what you see is what you pay.
  • Compare flight deals to Ontario International from Denver from over 1,000 providers. Then choose the cheapest or fastest plane tickets.
  • Flex your dates to find the best Denver-Ontario International ticket prices. If you are flexible when it comes to your travel dates, use Skyscanner's 'Whole month' tool to find the cheapest month, and even day to fly to Ontario International from Denver.
  • Set up a Price Alert. You can easily track the fare of your cheap Denver-Ontario International flights by creating an alert. Whenever prices go down or up, you'll get an email or push notification to help make sure you get the best possible flight deal.
  • Fly without stops. Only interested in direct flights between Denver and Ontario International? Make sure to tick 'Direct flights only' when performing a search. If there are direct flights available on the route, these will appear in the results.
  • Find the cheapest Business class flights from Denver and Ontario International. We scour the internet for the best Business, Premium Economy and First Class flight fares to Ontario International, too. Check the difference in price as you search – you might just chance upon a last-minute low fare. Note that not all cabin classes are available for every destination or airline.
  • Include nearby airports in your search. Widen your search for Denver to Ontario International flight deals by selecting the "add nearby airports" option. This will allow you to see flight prices for all the nearest airports at your departure point and your destination and could help you save next time you travel.
  • Combine your flight to Ontario International from Denver with hotels and car hire

    Once you've secured your cheap flight ticket from Denver to Ontario International, discover the best prices and exclusive rates for hotels in Ontario International or nearby. You can also compare hundreds of car hire companies in one go so that you get the best car hire price for your trip.


Prices shown on this page are estimated lowest prices only. Found in the last 45 days.