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ONT to HLN: distance & flight time
Ontario (Ontario International Airport) → Helena (Helena Regional Airport)
916 mi
1,474 km · 796 nm
2h 27m
estimated nonstop flight time
+1h
time difference · heading north
See live ONT→HLN fares Phone-only fares on this route — call free
Flight time details
916 miles nonstop takes roughly 2h 27m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time gain when reading arrival times on your ticket.
The two airports
- ONT — Ontario International Airport · Ontario, United States
- HLN — Helena Regional Airport · Helena, 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 HLN
- BTM · Bert Mooney Airport51 mi away
- GTF · Great Falls International Airport67 mi away
- BZN · Gallatin Field70 mi away
- LVM · Mission Field97 mi away
Frequently asked questions
How far is ONT from HLN?
The flight distance from Ontario (ONT) to Helena (HLN) is 916 miles (1,474 km, 796 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ONT to HLN?
A nonstop flight takes about 2h 27m 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 Helena?
Helena is 1 hour ahead of Ontario.
What is the cheapest way to fly from ONT to HLN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ONT–HLN that never appear on search engines, with no booking fees.