Distance between Houston, TX (IAH) and Portsmouth, NH (PSM)
Flight distance from Houston to Portsmouth (Houston George Bush Intercontinental Airport – Portsmouth International Airport at Pease) is 1626 miles / 2617 kilometers / 1413 nautical miles. Estimated flight time is 3 hours 34 minutes.
Driving distance from Houston (IAH) to Portsmouth (PSM) is 1903 miles / 3063 kilometers and travel time by car is about 33 hours 53 minutes.
Calculate Distance
Search by airport name, city or IATA airport code.
Multiple airports
Houston - Portsmouth
Map of flight path and driving directions from Houston to Portsmouth.
Shortest flight path between Houston George Bush Intercontinental Airport (IAH) and Portsmouth International Airport at Pease (PSM).
How far is Portsmouth from Houston?
There are several ways to calculate distances between Houston and Portsmouth. Here are two common methods:
Vincenty's formula (applied above)- 1626.311 miles
- 2617.294 kilometers
- 1413.226 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- 1624.745 miles
- 2614.774 kilometers
- 1411.865 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).
Airport information
| A | Houston George Bush Intercontinental Airport |
|---|---|
| City: | Houston, TX |
| Country: | United States  |
| IATA Code: | IAH |
| ICAO Code: | KIAH |
| Coordinates: | 29°59′3″N, 95°20′29″W |
| B | 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 |
Time difference and current local times
The time difference between Houston and Portsmouth is 1 hour. Portsmouth is 1 hour ahead of Houston.
Time Difference
Houston, TX
Portsmouth, NH
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 188 kg (414 pounds).
Frequent Flyer Miles Calculator
Houston (IAH) → Portsmouth (PSM).
In total
Round trip?