How far is St Louis, MO, from Portsmouth, NH?
The distance between Portsmouth (Portsmouth International Airport at Pease) and St Louis (St. Louis Lambert International Airport) is 1063 miles / 1711 kilometers / 924 nautical miles.
The driving distance from Portsmouth (PSM) to St Louis (STL) is 1238 miles / 1993 kilometers, and travel time by car is about 23 hours 35 minutes.
Portsmouth International Airport at Pease – St. Louis Lambert International Airport
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Distance from Portsmouth to St Louis
There are several ways to calculate the distance from Portsmouth to St Louis. 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 Portsmouth to St Louis?
The estimated flight time from Portsmouth International Airport at Pease to St. Louis Lambert International Airport is 2 hours and 30 minutes.
What is the time difference between Portsmouth and St Louis?
The time difference between Portsmouth and St Louis is 1 hour. St Louis is 1 hour behind Portsmouth.
Flight carbon footprint between Portsmouth International Airport at Pease (PSM) and St. Louis Lambert International Airport (STL)
On average, flying from Portsmouth to St Louis 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 Portsmouth to St Louis
See the map of the shortest flight path between Portsmouth International Airport at Pease (PSM) and St. Louis Lambert International Airport (STL).
Airport information
| Origin | 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 |
| Destination | 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 |