Cheap flights from Ontario to Denver (ONT - DEN)

Flight FAQs

From Ontario to Denver

Are flight prices decreasing from Ontario to Denver due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Ontario and Denver for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

What safety measures are being taken by airlines flying from Ontario to Denver Intl to control the spread of COVID-19?

Southwest and Delta are some of the many airlines that have implemented additional safety measures to control the spread of COVID-19. Some of the new policies that have been implemented to accommodate travelers flying from Ontario to Denver Intl are improved sanitation, HEPA filters, mask requirements, social distance seating (for a limited time), and pre-flight testing for antibodies and symptoms. Policies will vary by airline.

Which airlines flying from Ontario to Denver Intl have flexible cancellations due to COVID-19?

Some of our airline partners flying from Ontario to Denver Intl have new flexible policies in place due to COVID-19. Frontier, United Airlines, and American Airlines are some of the carriers where you may find flexible cancellation policies. You can use our site to filter for airlines like Frontier with this kind of flexibility.

Can I find flights from Ontario to Denver for under $100 on Cheapflights?

Yes, there are multiple flights from Ontario to Denver for under $100. The cheapest flight booked recently is on Frontier for just $66, but on average you can expect to pay $93.

Are there nonstop flights from Ontario to Denver for under $100 on Cheapflights?

Cheapflights has at least 20 direct flights from Ontario to Denver under $100. A good price for a nonstop flight from Ontario to Denver is less than $105.

Are there last-minute flights available from Ontario to Denver for under $100?

There are currently 20+ open flights from Ontario to Denver within the next 7 days for less than $100.

What days are nonstop flights available from Ontario to Denver?

Nonstop flights are available for this route on the following days: Tuesday, Wednesday, Thursday, Friday, Saturday.

How popular is this flight route?

This flight path from Ontario to Denver Intl was viewed by 816 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

How many flights depart from Ontario to Denver on average per day?

On average, you can expect to see 2 flights from Ontario to Denver Intl a day.
Morning (6am - Noon) - 100% of flight departures

Does it rain more in Ontario or Denver?

Expected rainfall in Ontario is same as in Denver. You can expect this to be the case over the next 7 days.

Is Ontario weather warmer or cooler than Denver?

Expect the weather to be around 95 °F on average in July. As the temperature peaks, try to get your plans done early, as flight price and availability will have an impact on your travels. The climate in Denver is generally colder than in Ontario.

How long is the flight from Ontario to Denver?

There are many flights that can get you from Ontario to Denver in 2h 10m. Fly via United Airlines, Frontier, or American Airlines to get the fastest option. Ontario and Denver are separated by a distance of 822 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

What are the cheapest airlines flying from Ontario to Denver round-trip?

According to our current data, Frontier ($66), United Airlines ($91), and American Airlines ($108) offers the cheapest pricing from Ontario to Denver. Frontier is priced at 58% lower than the current average price of a flight leaving 3 months from now.

What are the cheapest airlines to fly from Ontario to Denver one-way?

To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $37. United Airlines flights start at $49 while deals on American Airlines start at $54 one-way.