How far is Great Falls, MT, from Reading, PA?
The distance between Reading (Reading Regional Airport) and Great Falls (Great Falls International Airport) is 1816 miles / 2923 kilometers / 1578 nautical miles.
The driving distance from Reading (RDG) to Great Falls (GTF) is 2101 miles / 3382 kilometers, and travel time by car is about 38 hours 28 minutes.
Reading Regional Airport – Great Falls International Airport
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Distance from Reading to Great Falls
There are several ways to calculate the distance from Reading to Great Falls. Here are two standard methods:
Vincenty's formula (applied above)- 1816.002 miles
- 2922.571 kilometers
- 1578.062 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- 1811.517 miles
- 2915.354 kilometers
- 1574.165 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 Reading to Great Falls?
The estimated flight time from Reading Regional Airport to Great Falls International Airport is 3 hours and 56 minutes.
What is the time difference between Reading and Great Falls?
Flight carbon footprint between Reading Regional Airport (RDG) and Great Falls International Airport (GTF)
On average, flying from Reading to Great Falls generates about 201 kg of CO2 per passenger, and 201 kilograms equals 444 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.
Map of flight path and driving directions from Reading to Great Falls
See the map of the shortest flight path between Reading Regional Airport (RDG) and Great Falls International Airport (GTF).
Airport information
| Origin | Reading Regional Airport |
|---|---|
| City: | Reading, PA |
| Country: | United States  |
| IATA Code: | RDG |
| ICAO Code: | KRDG |
| Coordinates: | 40°22′42″N, 75°57′54″W |
| Destination | Great Falls International Airport |
|---|---|
| City: | Great Falls, MT |
| Country: | United States |
| IATA Code: | GTF |
| ICAO Code: | KGTF |
| Coordinates: | 47°28′55″N, 111°22′15″W |