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ONT to UGN: distance & flight time
Ontario (Ontario International Airport) → Chicago (Waukegan National Airport)
1,703 mi
2,741 km · 1,480 nm
3h 48m
estimated nonstop flight time
+2h
time difference · heading northeast
See live ONT→UGN fares Phone-only fares on this route — call free
Flight time details
1,703 miles nonstop takes roughly 3h 48m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 2-hour time gain when reading arrival times on your ticket.
The two airports
- ONT — Ontario International Airport · Ontario, United States
- UGN — Waukegan National Airport · Chicago, 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 UGN
- ORD · Chicago O'Hare International Airport31 mi away
- ENW · Kenosha Regional Airport12 mi away
- PWK · Chicago Executive Airport21 mi away
- RAC · John H Batten Airport24 mi away
Frequently asked questions
How far is ONT from UGN?
The flight distance from Ontario (ONT) to Chicago (UGN) is 1,703 miles (2,741 km, 1,480 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ONT to UGN?
A nonstop flight takes about 3h 48m 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 Chicago?
Chicago is 2 hours ahead of Ontario.
What is the cheapest way to fly from ONT to UGN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ONT–UGN that never appear on search engines, with no booking fees.