Need help booking?
Unpublished phone-only deals available
GRK to KOP: distance & flight time
Killeen (Robert Gray Army Air Field Airport) → Nakhon Phanom (Nakhon Phanom Airport)
8,772 mi
14,117 km · 7,622 nm
17h 40m
estimated nonstop flight time
+12h
time difference · heading northwest
See live GRK→KOP fares Phone-only fares on this route — call free
Flight time details
8,772 miles nonstop takes roughly 17h 40m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 12-hour time gain when reading arrival times on your ticket.
The two airports
- GRK — Robert Gray Army Air Field Airport · Killeen, United States
- KOP — Nakhon Phanom Airport · Nakhon Phanom, Thailand
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 GRK
- HLR · Hood Army Air Field8 mi away
- AUS · Austin Bergstrom International Airport61 mi away
- TPL · Draughon Miller Central Texas Regional Airport26 mi away
- ACT · Waco Regional Airport52 mi away
Near KOP
- SNO · Sakon Nakhon Airport37 mi away
- ZVK · Savannakhet Airport58 mi away
- ROI · Roi Et Airport105 mi away
- VII · Vinh Airport115 mi away
Frequently asked questions
How far is GRK from KOP?
The flight distance from Killeen (GRK) to Nakhon Phanom (KOP) is 8,772 miles (14,117 km, 7,622 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from GRK to KOP?
A nonstop flight takes about 17h 40m 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 Killeen and Nakhon Phanom?
Nakhon Phanom is 12 hours ahead of Killeen.
What is the cheapest way to fly from GRK to KOP?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on GRK–KOP that never appear on search engines, with no booking fees.