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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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1063
Miles
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1711
Kilometers
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924
Nautical miles

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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.

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 Flag of 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 Flag of United States
IATA Code: STL
ICAO Code: KSTL
Coordinates: 38°44′55″N, 90°22′12″W