Air Miles Calculator

Distance between Chicago, IL (MDW) and Portsmouth, NH (PSM)

Flight distance from Chicago to Portsmouth (Chicago Midway International Airport – Portsmouth International Airport at Pease) is 869 miles / 1398 kilometers / 755 nautical miles. Estimated flight time is 2 hours 8 minutes.

Driving distance from Chicago (MDW) to Portsmouth (PSM) is 1043 miles / 1679 kilometers and travel time by car is about 18 hours 38 minutes.

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

Shortest flight path between Chicago Midway International Airport (MDW) and Portsmouth International Airport at Pease (PSM).

How far is Portsmouth from Chicago?

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

Vincenty's formula (applied above)
  • 868.694 miles
  • 1398.028 kilometers
  • 754.875 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
  • 866.434 miles
  • 1394.390 kilometers
  • 752.910 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 Chicago Midway International Airport
City: Chicago, IL
Country: United States Flag of United States
IATA Code: MDW
ICAO Code: KMDW
Coordinates: 41°47′9″N, 87°45′8″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

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

Time Difference

Chicago, IL

 CDT

Portsmouth, NH

 EDT

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 141 kg (311 pounds).

Frequent Flyer Miles Calculator

Chicago (MDW) → Portsmouth (PSM).

Distance:
869
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
869

Round trip?