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FTK to OPO: distance & flight time
Fort Knox (Godman Army Air Field) → Porto (Francisco de Sá Carneiro Airport)
3,981 mi
6,407 km · 3,459 nm
8h 16m
estimated nonstop flight time
+5h
time difference · heading northeast
See live FTK→OPO fares Phone-only fares on this route — call free
Flight time details
3,981 miles nonstop takes roughly 8h 16m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 5-hour time gain when reading arrival times on your ticket.
The two airports
- FTK — Godman Army Air Field · Fort Knox, United States
- OPO — Francisco de Sá Carneiro Airport · Porto, Portugal
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 FTK
- SDF · Louisville International Standiford Field22 mi away
- LOU · Bowman Field28 mi away
- GLW · Glasgow Municipal Airport60 mi away
- FFT · Capital City Airport61 mi away
Near OPO
- BGZ · Braga Municipal Aerodrome26 mi away
- VRL · Vila Real Airport50 mi away
- VSE · Aerodromo Goncalves Lobato (Viseu Airport)55 mi away
- VGO · Vigo Airport68 mi away
Frequently asked questions
How far is FTK from OPO?
The flight distance from Fort Knox (FTK) to Porto (OPO) is 3,981 miles (6,407 km, 3,459 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from FTK to OPO?
A nonstop flight takes about 8h 16m 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 Knox and Porto?
Porto is 5 hours ahead of Fort Knox.
What is the cheapest way to fly from FTK to OPO?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on FTK–OPO that never appear on search engines, with no booking fees.