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TDR to HLN: distance & flight time
Theodore (Theodore Airport) → Helena (Helena Regional Airport)
7,817 mi
12,580 km · 6,793 nm
15h 48m
estimated nonstop flight time
-16h
time difference · heading northeast
See live TDR→HLN fares Phone-only fares on this route — call free
Flight time details
7,817 miles nonstop takes roughly 15h 48m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 16-hour time set-back when reading arrival times on your ticket.
The two airports
- TDR — Theodore Airport · Theodore, Australia
- 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 TDR
- THG · Thangool Airport46 mi away
- XTO · Taroom Airport57 mi away
- GLT · Gladstone Airport105 mi away
- GAH · Gayndah Airport105 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 TDR from HLN?
The flight distance from Theodore (TDR) to Helena (HLN) is 7,817 miles (12,580 km, 6,793 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from TDR to HLN?
A nonstop flight takes about 15h 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 Theodore and Helena?
Helena is 16 hours behind Theodore.
What is the cheapest way to fly from TDR to HLN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on TDR–HLN that never appear on search engines, with no booking fees.