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PMH to ISN: distance & flight time

Portsmouth (Greater Portsmouth Regional Airport) → Williston (Sloulin Field International Airport)

1,220 mi
1,963 km · 1,060 nm
3h 7m
estimated nonstop flight time
—
time difference · heading northwest
See live PMH→ISN fares Phone-only fares on this route — call free

Flight time details

1,220 miles nonstop takes roughly 3h 7m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Both airports share the same local time, so schedules read exactly as flown.

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The two airports

Distances are great-circle ("as the crow flies") — the same basis airlines use for frequent-flyer miles.

Alternate airports can cut this fare

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Frequently asked questions

How far is PMH from ISN?

The flight distance from Portsmouth (PMH) to Williston (ISN) is 1,220 miles (1,963 km, 1,060 nautical miles), measured along the great-circle route airlines actually fly.

How long is the flight from PMH to ISN?

A nonstop flight takes about 3h 7m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.

What is the cheapest way to fly from PMH to ISN?

Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on PMH–ISN that never appear on search engines, with no booking fees.
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