How far is Reading, PA, from Great Falls, MT?
The distance between Great Falls (Great Falls International Airport) and Reading (Reading Regional Airport) is 1816 miles / 2923 kilometers / 1578 nautical miles.
The driving distance from Great Falls (GTF) to Reading (RDG) is 2099 miles / 3378 kilometers, and travel time by car is about 38 hours 16 minutes.
Great Falls International Airport – Reading Regional Airport
Search flights
Distance from Great Falls to Reading
There are several ways to calculate the distance from Great Falls to Reading. 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 Great Falls to Reading?
The estimated flight time from Great Falls International Airport to Reading Regional Airport is 3 hours and 56 minutes.
What is the time difference between Great Falls and Reading?
Flight carbon footprint between Great Falls International Airport (GTF) and Reading Regional Airport (RDG)
On average, flying from Great Falls to Reading 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 Great Falls to Reading
See the map of the shortest flight path between Great Falls International Airport (GTF) and Reading Regional Airport (RDG).
Airport information
| Origin | 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 |
| Destination | Reading Regional Airport |
|---|---|
| City: | Reading, PA |
| Country: | United States |
| IATA Code: | RDG |
| ICAO Code: | KRDG |
| Coordinates: | 40°22′42″N, 75°57′54″W |