Air Miles Calculator

Distance between St Louis, MO (STL) and Portsmouth, NH (PSM)

Distance from St Louis to Portsmouth (St. Louis Lambert International Airport – Portsmouth International Airport at Pease) is 1063 miles / 1711 kilometers / 924 nautical miles.

How far is Portsmouth from St Louis?

There are several ways to calculate distances between St Louis and Portsmouth. Here are two common 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 earth.

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).

Flight duration

Estimated flight time from St. Louis Lambert International Airport (STL) to Portsmouth International Airport at Pease (PSM) is 2 hours 30 minutes.

Time difference and current local times

The time difference between St Louis and Portsmouth is 1 hour. Portsmouth is 1 hour ahead of St Louis.

Time Difference

St Louis
Portsmouth

St Louis, MO

 CST

Portsmouth, NH

 EST

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 155 kg (341 pounds).

Airport information


A 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

B 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

Map

St Louis to Portsmouth flight map.

Frequent Flyer Miles Calculator

St Louis (STL) → Portsmouth (PSM).

Elite level bonus (%):
Booking class bonus (%):
Air miles:
1063
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
1063

Round trip?