How far is Helena, MT, from Sydney?
The distance between Sydney (Sydney Airport) and Helena (Helena Regional Airport) is 8164 miles / 13138 kilometers / 7094 nautical miles.
Sydney Airport – Helena Regional Airport
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Distance from Sydney to Helena
There are several ways to calculate the distance from Sydney to Helena. Here are two standard methods:
Vincenty's formula (applied above)- 8163.541 miles
- 13137.946 kilometers
- 7093.924 nautical miles
Vincenty's formula calculates the distance between latitude/longitude points on the earth's surface using an ellipsoidal model of the planet.
Haversine formula- 8171.776 miles
- 13151.199 kilometers
- 7101.079 nautical miles
The haversine formula calculates the distance between latitude/longitude points assuming a spherical earth (great-circle distance – the shortest distance between two points).
How long does it take to fly from Sydney to Helena?
The estimated flight time from Sydney Airport to Helena Regional Airport is 15 hours and 57 minutes.
What is the time difference between Sydney and Helena?
The time difference between Sydney and Helena is 18 hours. Helena is 18 hours behind Sydney.
Flight carbon footprint between Sydney Airport (SYD) and Helena Regional Airport (HLN)
On average, flying from Sydney to Helena generates about 1 022 kg of CO2 per passenger, and 1 022 kilograms equals 2 254 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.
Map of flight path from Sydney to Helena
See the map of the shortest flight path between Sydney Airport (SYD) and Helena Regional Airport (HLN).
Airport information
| Origin | Sydney Airport |
|---|---|
| City: | Sydney |
| Country: | Australia  |
| IATA Code: | SYD |
| ICAO Code: | YSSY |
| Coordinates: | 33°56′45″S, 151°10′37″E |
| Destination | Helena Regional Airport |
|---|---|
| City: | Helena, MT |
| Country: | United States  |
| IATA Code: | HLN |
| ICAO Code: | KHLN |
| Coordinates: | 46°36′24″N, 111°58′58″W |