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KOP to SDF: distance & flight time
Nakhon Phanom (Nakhon Phanom Airport) → Louisville (Louisville International Standiford Field)
8,539 mi
13,743 km · 7,421 nm
17h 13m
estimated nonstop flight time
-11h
time difference · heading north
See live KOP→SDF fares Phone-only fares on this route — call free
Flight time details
8,539 miles nonstop takes roughly 17h 13m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 11-hour time set-back when reading arrival times on your ticket.
The two airports
- KOP — Nakhon Phanom Airport · Nakhon Phanom, Thailand
- 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 KOP
- SNO · Sakon Nakhon Airport37 mi away
- ZVK · Savannakhet Airport58 mi away
- ROI · Roi Et Airport105 mi away
- VII · Vinh Airport115 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 KOP from SDF?
The flight distance from Nakhon Phanom (KOP) to Louisville (SDF) is 8,539 miles (13,743 km, 7,421 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from KOP to SDF?
A nonstop flight takes about 17h 13m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
Are there nonstop flights from KOP to SDF?
Nonstop service on KOP–SDF depends on the season and the day of week. Run the fare search on this page with the nonstop filter applied to see current direct options; when there is no nonstop, a single connection through a carrier hub adds roughly 2–4 hours to the 17h 13m nonstop estimate.
What is the time difference between Nakhon Phanom and Louisville?
Louisville is 11 hours behind Nakhon Phanom.
What is the cheapest way to fly from KOP to SDF?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KOP–SDF that never appear on search engines, with no booking fees.
Why are some KOP to SDF fares phone-only?
Consolidator contracts let us sell certain KOP–SDF tickets below the price airlines permit us to publish online, so those fares can only be quoted over the phone. Call the travel desk and an agent will check phone-only inventory for your dates.