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HLN to ONO: distance & flight time
Helena (Helena Regional Airport) → Ontario (Ontario Municipal Airport)
303 mi
487 km · 263 nm
1h 16m
estimated nonstop flight time
Same time
time difference · heading southwest
See live HLN→ONO fares Phone-only fares on this route — call free
Flight time details
303 miles nonstop takes roughly 1h 16m gate to gate, flying southwest. Add 45–90 minutes per connection if there's no nonstop service. Both airports share the same local time, so schedules read exactly as flown.
The two airports
- HLN — Helena Regional Airport · Helena, United States
- ONO — Ontario Municipal 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 HLN
- BTM · Bert Mooney Airport51 mi away
- GTF · Great Falls International Airport67 mi away
- BZN · Gallatin Field70 mi away
- LVM · Mission Field97 mi away
Near ONO
- BOI · Boise Air Terminal/Gowen Field50 mi away
- BKE · Baker City Municipal Airport69 mi away
- MYL · McCall Municipal Airport75 mi away
- MUO · Mountain Home Air Force Base88 mi away
Frequently asked questions
How far is HLN from ONO?
The flight distance from Helena (HLN) to Ontario (ONO) is 303 miles (487 km, 263 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from HLN to ONO?
A nonstop flight takes about 1h 16m 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 cheapest way to fly from HLN to ONO?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on HLN–ONO that never appear on search engines, with no booking fees.