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GSO to ONT: distance & flight time
Greensboro (Piedmont Triad International Airport) → Ontario (Ontario International Airport)
2,121 mi
3,414 km · 1,843 nm
4h 38m
estimated nonstop flight time
-3h
time difference · heading west
See live GSO→ONT fares Phone-only fares on this route — call free
Flight time details
2,121 miles nonstop takes roughly 4h 38m 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
- GSO — Piedmont Triad International Airport · Greensboro, 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 GSO
- INT · Smith Reynolds Airport16 mi away
- CLT · Charlotte Douglas International Airport83 mi away
- DAN · Danville Regional Airport47 mi away
- SVH · Statesville Regional Airport61 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 GSO from ONT?
The flight distance from Greensboro (GSO) to Ontario (ONT) is 2,121 miles (3,414 km, 1,843 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from GSO to ONT?
A nonstop flight takes about 4h 38m 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 Greensboro and Ontario?
Ontario is 3 hours behind Greensboro.
What is the cheapest way to fly from GSO to ONT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on GSO–ONT that never appear on search engines, with no booking fees.