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FSI to PHN: distance & flight time
Fort Sill (Henry Post Army Air Field (Fort Sill)) → Port Huron (St Clair County International Airport)
1,025 mi
1,650 km · 891 nm
2h 42m
estimated nonstop flight time
+1h
time difference · heading northeast
See live FSI→PHN fares Phone-only fares on this route — call free
Flight time details
1,025 miles nonstop takes roughly 2h 42m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time gain when reading arrival times on your ticket.
The two airports
- FSI — Henry Post Army Air Field (Fort Sill) · Fort Sill, United States
- PHN — St Clair County International Airport · Port Huron, 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 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
Near PHN
Frequently asked questions
How far is FSI from PHN?
The flight distance from Fort Sill (FSI) to Port Huron (PHN) is 1,025 miles (1,650 km, 891 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from FSI to PHN?
A nonstop flight takes about 2h 42m 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 Fort Sill and Port Huron?
Port Huron is 1 hour ahead of Fort Sill.
What is the cheapest way to fly from FSI to PHN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on FSI–PHN that never appear on search engines, with no booking fees.