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PSM to FSI: distance & flight time
Portsmouth (Portsmouth International at Pease Airport) → Fort Sill (Henry Post Army Air Field (Fort Sill))
1,585 mi
2,551 km · 1,377 nm
3h 34m
estimated nonstop flight time
-1h
time difference · heading west
See live PSM→FSI fares Phone-only fares on this route — call free
Flight time details
1,585 miles nonstop takes roughly 3h 34m gate to gate, flying west. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time set-back when reading arrival times on your ticket.
The two airports
- PSM — Portsmouth International at Pease Airport · Portsmouth, United States
- FSI — Henry Post Army Air Field (Fort Sill) · Fort Sill, 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 FSI
- LAW · Lawton Fort Sill Regional Airport6 mi away
- DUC · Halliburton Field28 mi away
- HBR · Hobart Regional Airport44 mi away
- SPS · Sheppard Air Force Base-Wichita Falls Municipal Airport46 mi away
Frequently asked questions
How far is PSM from FSI?
The flight distance from Portsmouth (PSM) to Fort Sill (FSI) is 1,585 miles (2,551 km, 1,377 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from PSM to FSI?
A nonstop flight takes about 3h 34m 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 Fort Sill?
Fort Sill is 1 hour behind Portsmouth.
What is the cheapest way to fly from PSM to FSI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on PSM–FSI that never appear on search engines, with no booking fees.