Need help booking?
Unpublished phone-only deals available
ONT to APA: distance & flight time
Ontario (Ontario International Airport) → Denver (Centennial Airport)
801 mi
1,288 km · 696 nm
2h 12m
estimated nonstop flight time
+1h
time difference · heading northeast
See live ONT→APA fares Phone-only fares on this route — call free
Flight time details
801 miles nonstop takes roughly 2h 12m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time gain when reading arrival times on your ticket.
The two airports
- ONT — Ontario International Airport · Ontario, United States
- APA — Centennial Airport · Denver, United States
Distances are great-circle ("as the crow flies") — the same basis airlines use for frequent-flyer miles.
Alternate airports can cut this fare
Flying from or into a nearby airport is the #1 trick our agents use to beat online prices. Call and we'll compare every combination on one call.
Near ONT
- CCB · Cable Airport6 mi away
- CNO · Chino Airport6 mi away
- LAX · Los Angeles International Airport47 mi away
- RAL · Riverside Municipal Airport11 mi away
Near APA
- DEN · Denver International Airport22 mi away
- BFK · Buckley Air Force Base10 mi away
- BJC · Rocky Mountain Metropolitan Airport27 mi away
- WBU · Boulder Municipal Airport38 mi away
Frequently asked questions
How far is ONT from APA?
The flight distance from Ontario (ONT) to Denver (APA) is 801 miles (1,288 km, 696 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ONT to APA?
A nonstop flight takes about 2h 12m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
What is the time difference between Ontario and Denver?
Denver is 1 hour ahead of Ontario.
What is the cheapest way to fly from ONT to APA?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ONT–APA that never appear on search engines, with no booking fees.