# 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.

## 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.

CST

EST

## Carbon dioxide emissions

Estimated CO2 emissions per passenger is 188 kg (414 pounds).

## Frequent Flyer Miles Calculator

Houston (IAH) → Portsmouth (PSM).

Distance:
1626
Elite level bonus:
0
Booking class bonus:
0

### In total

Total frequent flyer miles:
1626

Round trip?