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GRB to ONT: distance & flight time
Green Bay (Austin Straubel International Airport) → Ontario (Ontario International Airport)
1,721 mi
2,769 km · 1,495 nm
3h 50m
estimated nonstop flight time
-2h
time difference · heading west
See live GRB→ONT fares Phone-only fares on this route — call free
Flight time details
1,721 miles nonstop takes roughly 3h 50m gate to gate, flying west. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 2-hour time set-back when reading arrival times on your ticket.
The two airports
- GRB — Austin Straubel International Airport · Green Bay, 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 GRB
- ATW · Appleton International Airport25 mi away
- OSH · Wittman Regional Airport41 mi away
- MNM · Menominee Regional Airport50 mi away
- SBM · Sheboygan County Memorial Airport51 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 GRB from ONT?
The flight distance from Green Bay (GRB) to Ontario (ONT) is 1,721 miles (2,769 km, 1,495 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from GRB to ONT?
A nonstop flight takes about 3h 50m 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 Green Bay and Ontario?
Ontario is 2 hours behind Green Bay.
What is the cheapest way to fly from GRB to ONT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on GRB–ONT that never appear on search engines, with no booking fees.