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CPR to PSM: distance & flight time
Casper (Casper-Natrona County International Airport) → Portsmouth (Portsmouth International at Pease Airport)
1,787 mi
2,877 km · 1,553 nm
3h 58m
estimated nonstop flight time
+2h
time difference · heading east
See live CPR→PSM fares Phone-only fares on this route — call free
Flight time details
1,787 miles nonstop takes roughly 3h 58m 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
- CPR — Casper-Natrona County International Airport · Casper, 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 CPR
- RWL · Rawlins Municipal Airport/Harvey Field85 mi away
- RIW · Riverton Regional Airport101 mi away
- SAA · Shively Field103 mi away
- WRL · Worland Municipal 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 CPR from PSM?
The flight distance from Casper (CPR) to Portsmouth (PSM) is 1,787 miles (2,877 km, 1,553 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from CPR to PSM?
A nonstop flight takes about 3h 58m 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 Casper and Portsmouth?
Portsmouth is 2 hours ahead of Casper.
What is the cheapest way to fly from CPR to PSM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on CPR–PSM that never appear on search engines, with no booking fees.