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FNL to ONT: distance & flight time
Fort Collins (Northern Colorado Regional Airport) → Ontario (Ontario International Airport)
820 mi
1,320 km · 713 nm
2h 15m
estimated nonstop flight time
-1h
time difference · heading southwest
See live FNL→ONT fares Phone-only fares on this route — call free
Flight time details
820 miles nonstop takes roughly 2h 15m gate to gate, flying southwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time set-back when reading arrival times on your ticket.
The two airports
- FNL — Northern Colorado Regional Airport · Fort Collins, United States
- ONT — Ontario International Airport · Ontario, 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 FNL
- DEN · Denver International Airport45 mi away
- GXY · Greeley–Weld County Airport20 mi away
- WBU · Boulder Municipal Airport31 mi away
- BJC · Rocky Mountain Metropolitan Airport38 mi away
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
Frequently asked questions
How far is FNL from ONT?
The flight distance from Fort Collins (FNL) to Ontario (ONT) is 820 miles (1,320 km, 713 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from FNL to ONT?
A nonstop flight takes about 2h 15m 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 Fort Collins and Ontario?
Ontario is 1 hour behind Fort Collins.
What is the cheapest way to fly from FNL to ONT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on FNL–ONT that never appear on search engines, with no booking fees.