Need help booking?
Unpublished phone-only deals available
RML to KOP: distance & flight time
Colombo (Colombo Ratmalana Airport) → Nakhon Phanom (Nakhon Phanom Airport)
1,822 mi
2,932 km · 1,583 nm
4h 2m
estimated nonstop flight time
+1.5h
time difference · heading northeast
See live RML→KOP fares Phone-only fares on this route — call free
Flight time details
1,822 miles nonstop takes roughly 4h 2m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1.5-hour time gain when reading arrival times on your ticket.
The two airports
- RML — Colombo Ratmalana Airport · Colombo, Sri Lanka
- 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 RML
- CMB · Bandaranaike International Colombo Airport25 mi away
- KCT · Koggala Airport65 mi away
- HRI · Mattala Rajapaksa International Airport93 mi away
- GIU · Sigiriya Air Force Base97 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 RML from KOP?
The flight distance from Colombo (RML) to Nakhon Phanom (KOP) is 1,822 miles (2,932 km, 1,583 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from RML to KOP?
A nonstop flight takes about 4h 2m 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 Colombo and Nakhon Phanom?
Nakhon Phanom is 1.5 hours ahead of Colombo.
What is the cheapest way to fly from RML to KOP?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on RML–KOP that never appear on search engines, with no booking fees.