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GTF to PSM: distance & flight time
Great Falls (Great Falls International Airport) → Portsmouth (Portsmouth International at Pease Airport)
1,972 mi
3,173 km · 1,713 nm
4h 20m
estimated nonstop flight time
+2h
time difference · heading east
See live GTF→PSM fares Phone-only fares on this route — call free
Flight time details
1,972 miles nonstop takes roughly 4h 20m gate to gate, flying east. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 2-hour time gain when reading arrival times on your ticket.
The two airports
- GTF — Great Falls International Airport · Great Falls, United States
- PSM — Portsmouth International at Pease Airport · Portsmouth, United States
Distances are great-circle ("as the crow flies") — the same basis airlines use for frequent-flyer miles.
Alternate airports can cut this fare
Flying from or into a nearby airport is the #1 trick our agents use to beat online prices. Call and we'll compare every combination on one call.
Near GTF
- HLN · Helena Regional Airport67 mi away
- CTB · Cut Bank International Airport91 mi away
- LWT · Lewistown Municipal Airport94 mi away
- HVR · Havre City County Airport104 mi away
Near PSM
- BOS · General Edward Lawrence Logan International Airport50 mi away
- LWM · Lawrence Municipal Airport29 mi away
- MHT · Manchester-Boston Regional Airport33 mi away
- BVY · Beverly Municipal Airport34 mi away
Frequently asked questions
How far is GTF from PSM?
The flight distance from Great Falls (GTF) to Portsmouth (PSM) is 1,972 miles (3,173 km, 1,713 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from GTF to PSM?
A nonstop flight takes about 4h 20m 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 time difference between Great Falls and Portsmouth?
Portsmouth is 2 hours ahead of Great Falls.
What is the cheapest way to fly from GTF to PSM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on GTF–PSM that never appear on search engines, with no booking fees.