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OPO to SDF: distance & flight time
Porto (Francisco de Sá Carneiro Airport) → Louisville (Louisville International Standiford Field)
3,961 mi
6,374 km · 3,442 nm
8h 14m
estimated nonstop flight time
-5h
time difference · heading northwest
See live OPO→SDF fares Phone-only fares on this route — call free
Flight time details
3,961 miles nonstop takes roughly 8h 14m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 5-hour time set-back when reading arrival times on your ticket.
The two airports
- OPO — Francisco de Sá Carneiro Airport · Porto, Portugal
- SDF — Louisville International Standiford Field · Louisville, 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 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
Near SDF
- LOU · Bowman Field5 mi away
- FTK · Godman Army Air Field22 mi away
- FFT · Capital City Airport45 mi away
- LEX · Blue Grass Airport62 mi away
Frequently asked questions
How far is OPO from SDF?
The flight distance from Porto (OPO) to Louisville (SDF) is 3,961 miles (6,374 km, 3,442 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from OPO to SDF?
A nonstop flight takes about 8h 14m 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 Porto and Louisville?
Louisville is 5 hours behind Porto.
What is the cheapest way to fly from OPO to SDF?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on OPO–SDF that never appear on search engines, with no booking fees.