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ATL to ONT: distance & flight time
Atlanta (Hartsfield Jackson Atlanta International Airport) → Ontario (Ontario International Airport)
1,895 mi
3,050 km · 1,647 nm
4h 11m
estimated nonstop flight time
-3h
time difference · heading west
See live ATL→ONT fares Phone-only fares on this route — call free
Flight time details
1,895 miles nonstop takes roughly 4h 11m gate to gate, flying west. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 3-hour time set-back when reading arrival times on your ticket.
The two airports
- ATL — Hartsfield Jackson Atlanta International Airport · Atlanta, 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 ATL
- FTY · Fulton County Airport Brown Field11 mi away
- PDK · DeKalb Peachtree Airport18 mi away
- MGE · Dobbins Air Reserve Base20 mi away
- LZU · Gwinnett County Briscoe Field36 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 ATL from ONT?
The flight distance from Atlanta (ATL) to Ontario (ONT) is 1,895 miles (3,050 km, 1,647 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ATL to ONT?
A nonstop flight takes about 4h 11m 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 Atlanta and Ontario?
Ontario is 3 hours behind Atlanta.
What is the cheapest way to fly from ATL to ONT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ATL–ONT that never appear on search engines, with no booking fees.