How far is Sydney from Helena, MT?
The distance between Helena (Helena Regional Airport) and Sydney (Sydney/J.A. Douglas McCurdy Airport) is 2437 miles / 3921 kilometers / 2117 nautical miles.
The driving distance from Helena (HLN) to Sydney (YQY) is 3053 miles / 4913 kilometers, and travel time by car is about 59 hours 16 minutes.
Helena Regional Airport – Sydney/J.A. Douglas McCurdy Airport
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Distance from Helena to Sydney
There are several ways to calculate the distance from Helena to Sydney. Here are two standard methods:
Vincenty's formula (applied above)- 2436.562 miles
- 3921.267 kilometers
- 2117.315 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- 2429.572 miles
- 3910.018 kilometers
- 2111.241 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 Helena to Sydney?
The estimated flight time from Helena Regional Airport to Sydney/J.A. Douglas McCurdy Airport is 5 hours and 6 minutes.
What is the time difference between Helena and Sydney?
The time difference between Helena and Sydney is 3 hours. Sydney is 3 hours ahead of Helena.
Flight carbon footprint between Helena Regional Airport (HLN) and Sydney/J.A. Douglas McCurdy Airport (YQY)
On average, flying from Helena to Sydney generates about 268 kg of CO2 per passenger, and 268 kilograms equals 590 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.
Map of flight path and driving directions from Helena to Sydney
See the map of the shortest flight path between Helena Regional Airport (HLN) and Sydney/J.A. Douglas McCurdy Airport (YQY).
Airport information
| Origin | Helena Regional Airport |
|---|---|
| City: | Helena, MT |
| Country: | United States  |
| IATA Code: | HLN |
| ICAO Code: | KHLN |
| Coordinates: | 46°36′24″N, 111°58′58″W |
| Destination | Sydney/J.A. Douglas McCurdy Airport |
|---|---|
| City: | Sydney |
| Country: | Canada  |
| IATA Code: | YQY |
| ICAO Code: | CYQY |
| Coordinates: | 46°9′41″N, 60°2′52″W |