Air Miles Calculator

Distance between Detroit, MI (DTW) and Portsmouth, NH (PSM)

Flight distance from Detroit to Portsmouth (Detroit Metropolitan Airport – Portsmouth International Airport at Pease) is 641 miles / 1031 kilometers / 557 nautical miles. Estimated flight time is 1 hour 42 minutes.

Driving distance from Detroit (DTW) to Portsmouth (PSM) is 788 miles / 1268 kilometers and travel time by car is about 14 hours 48 minutes.

Map of flight path and driving directions from Detroit to Portsmouth.

Shortest flight path between Detroit Metropolitan Airport (DTW) and Portsmouth International Airport at Pease (PSM).

How far is Portsmouth from Detroit?

There are several ways to calculate distances between Detroit and Portsmouth. Here are two common methods:

Vincenty's formula (applied above)
  • 640.691 miles
  • 1031.092 kilometers
  • 556.745 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
  • 639.011 miles
  • 1028.389 kilometers
  • 555.286 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 Detroit Metropolitan Airport
City: Detroit, MI
Country: United States Flag of United States
IATA Code: DTW
ICAO Code: KDTW
Coordinates: 42°12′44″N, 83°21′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

Time difference and current local times

There is no time difference between Detroit and Portsmouth.

Time Difference

Detroit, MI

 EST

Portsmouth, NH

 EST

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 118 kg (260 pounds).

Frequent Flyer Miles Calculator

Detroit (DTW) → Portsmouth (PSM).

Distance:
641
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
641

Round trip?