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HLN to OTP: distance & flight time
Helena (Helena Regional Airport) → Bucharest (Henri Coandă International Airport)
5,639 mi
9,075 km · 4,900 nm
11h 31m
estimated nonstop flight time
+9h
time difference · heading northeast
See live HLN→OTP fares Phone-only fares on this route — call free
Flight time details
5,639 miles nonstop takes roughly 11h 31m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 9-hour time gain when reading arrival times on your ticket.
The two airports
- HLN — Helena Regional Airport · Helena, United States
- OTP — Henri Coandă International Airport · Bucharest, Romania
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 OTP
- BBU · Băneasa International Airport5 mi away
- GOZ · Gorna Oryahovitsa Airport100 mi away
- CRA · Craiova Airport110 mi away
- CND · Mihail Kogălniceanu International Airport119 mi away
Frequently asked questions
How far is HLN from OTP?
The flight distance from Helena (HLN) to Bucharest (OTP) is 5,639 miles (9,075 km, 4,900 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from HLN to OTP?
A nonstop flight takes about 11h 31m 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 Helena and Bucharest?
Bucharest is 9 hours ahead of Helena.
What is the cheapest way to fly from HLN to OTP?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on HLN–OTP that never appear on search engines, with no booking fees.