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PSM to BTM: distance & flight time
Portsmouth (Portsmouth International at Pease Airport) → Butte (Bert Mooney Airport)
2,039 mi
3,282 km · 1,772 nm
4h 28m
estimated nonstop flight time
-2h
time difference · heading west
See live PSM→BTM fares Phone-only fares on this route — call free
Flight time details
2,039 miles nonstop takes roughly 4h 28m gate to gate, flying west. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 2-hour time set-back when reading arrival times on your ticket.
The two airports
- PSM — Portsmouth International at Pease Airport · Portsmouth, United States
- BTM — Bert Mooney Airport · Butte, 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 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
Near BTM
- HLN · Helena Regional Airport51 mi away
- BZN · Gallatin Field66 mi away
- SMN · Lemhi County Airport88 mi away
- LVM · Mission Field100 mi away
Frequently asked questions
How far is PSM from BTM?
The flight distance from Portsmouth (PSM) to Butte (BTM) is 2,039 miles (3,282 km, 1,772 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from PSM to BTM?
A nonstop flight takes about 4h 28m 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 Portsmouth and Butte?
Butte is 2 hours behind Portsmouth.
What is the cheapest way to fly from PSM to BTM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on PSM–BTM that never appear on search engines, with no booking fees.