Map of flight path and driving directions from St Louis to Portsmouth.
Shortest flight path between St. Louis Lambert International Airport (STL) and Portsmouth International Airport at Pease (PSM).
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).
|A||St. Louis Lambert International Airport|
|City:||St Louis, MO|
|B||Portsmouth International Airport at Pease|
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.
St Louis, MO
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 155 kg (341 pounds).
Frequent Flyer Miles Calculator
St Louis (STL) → Portsmouth (PSM).