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TGA to HLN: distance & flight time
Tengah (Tengah Air Base) → Helena (Helena Regional Airport)
8,478 mi
13,643 km · 7,367 nm
17h 5m
estimated nonstop flight time
-14h
time difference · heading northeast
See live TGA→HLN fares Phone-only fares on this route — call free
Flight time details
8,478 miles nonstop takes roughly 17h 5m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 14-hour time set-back when reading arrival times on your ticket.
The two airports
- TGA — Tengah Air Base · Tengah, Singapore
- 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 TGA
- SIN · Singapore Changi Airport20 mi away
- XSP · Seletar Airport11 mi away
- QPG · Paya Lebar Air Base14 mi away
- JHB · Senai International Airport18 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 TGA from HLN?
The flight distance from Tengah (TGA) to Helena (HLN) is 8,478 miles (13,643 km, 7,367 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from TGA to HLN?
A nonstop flight takes about 17h 5m 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 Tengah and Helena?
Helena is 14 hours behind Tengah.
What is the cheapest way to fly from TGA to HLN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on TGA–HLN that never appear on search engines, with no booking fees.