How far is Portsmouth, NH, from St Louis, MO?
The distance between St Louis (St. Louis Lambert International Airport) and Portsmouth (Portsmouth International Airport at Pease) is 1063 miles / 1711 kilometers / 924 nautical miles.
The driving distance from St Louis (STL) to Portsmouth (PSM) is 1244 miles / 2002 kilometers, and travel time by car is about 23 hours 39 minutes.
St. Louis Lambert International Airport – Portsmouth International Airport at Pease
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Distance from St Louis to Portsmouth
There are several ways to calculate the distance from St Louis to Portsmouth. Here are two standard methods:
Vincenty's formula (applied above)- 1063.122 miles
- 1710.929 kilometers
- 923.828 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- 1060.732 miles
- 1707.083 kilometers
- 921.751 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 St Louis to Portsmouth?
The estimated flight time from St. Louis Lambert International Airport to Portsmouth International Airport at Pease is 2 hours and 30 minutes.
What is the time difference between St Louis and Portsmouth?
Flight carbon footprint between St. Louis Lambert International Airport (STL) and Portsmouth International Airport at Pease (PSM)
On average, flying from St Louis to Portsmouth generates about 155 kg of CO2 per passenger, and 155 kilograms equals 341 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.
Map of flight path and driving directions from St Louis to Portsmouth
See the map of the shortest flight path between St. Louis Lambert International Airport (STL) and Portsmouth International Airport at Pease (PSM).
Airport information
| Origin | St. Louis Lambert International Airport |
|---|---|
| City: | St Louis, MO |
| Country: | United States  |
| IATA Code: | STL |
| ICAO Code: | KSTL |
| Coordinates: | 38°44′55″N, 90°22′12″W |
| Destination | Portsmouth International Airport at Pease |
|---|---|
| City: | Portsmouth, NH |
| Country: | United States |
| IATA Code: | PSM |
| ICAO Code: | KPSM |
| Coordinates: | 43°4′40″N, 70°49′23″W |