Need help booking?
Unpublished phone-only deals available
RAP to PSM: distance & flight time
Rapid City (Rapid City Regional Airport) → Portsmouth (Portsmouth International at Pease Airport)
1,605 mi
2,583 km · 1,395 nm
3h 37m
estimated nonstop flight time
+2h
time difference · heading east
See live RAP→PSM fares Phone-only fares on this route — call free
Flight time details
1,605 miles nonstop takes roughly 3h 37m 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
- RAP — Rapid City Regional Airport · Rapid City, 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 RAP
- RCA · Ellsworth Air Force Base7 mi away
- SPF · Black Hills Airport-Clyde Ice Field47 mi away
- CDR · Chadron Municipal Airport83 mi away
- GCC · Gillette Campbell County Airport125 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 RAP from PSM?
The flight distance from Rapid City (RAP) to Portsmouth (PSM) is 1,605 miles (2,583 km, 1,395 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from RAP to PSM?
A nonstop flight takes about 3h 37m 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 Rapid City and Portsmouth?
Portsmouth is 2 hours ahead of Rapid City.
What is the cheapest way to fly from RAP to PSM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on RAP–PSM that never appear on search engines, with no booking fees.