The flight distance from Denver International Airport (DEN) in Denver, United States to Ontario International Airport (ONT) in Ontario, United States is 1,316 kilometers (817 miles / 710 nautical miles). The estimated flight time for this route is approximately 3h, flying west southwest at a heading of 245°.

This is a short-haul route typically served by narrow-body aircraft such as the Boeing 737 or Airbus A320 family. In-flight service is usually limited to drinks and light snacks.

This is a domestic route within United States. Both airports operate in the same country, which may simplify travel requirements and documentation. Despite being a domestic route, there is a 1-hour time difference between the two cities.

Time zone information: When it's 03:00 in Denver, it's 02:00 in Ontario.

There is a significant elevation difference of 4,490 feet between the two airports. Ontario International Airport sits lower than Denver International Airport. Travelers arriving at the higher-elevation airport should be aware of potential altitude effects.

The return flight from Ontario (ONT) to Denver (DEN) follows a heading of 57° (east northeast). Actual flight times may vary depending on wind conditions, air traffic, and the specific aircraft used.

For more information about these airports, visit the Denver International Airport (DEN) and Ontario International Airport (ONT) detail pages, or use our flight duration calculator to compare other routes.