Need help booking?
Unpublished phone-only deals available
RML to UBP: distance & flight time
Colombo (Colombo Ratmalana Airport) → Ubon Ratchathani (Ubon Ratchathani Airport)
1,790 mi
2,880 km · 1,555 nm
3h 59m
estimated nonstop flight time
+1.5h
time difference · heading east
See live RML→UBP fares Phone-only fares on this route — call free
Flight time details
1,790 miles nonstop takes roughly 3h 59m gate to gate, flying east. 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
- UBP — Ubon Ratchathani Airport · Ubon Ratchathani, 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 UBP
- PKZ · Pakse International Airport61 mi away
- ZVK · Savannakhet Airport90 mi away
- ROI · Roi Et Airport94 mi away
- PXR · Surin Airport95 mi away
Frequently asked questions
How far is RML from UBP?
The flight distance from Colombo (RML) to Ubon Ratchathani (UBP) is 1,790 miles (2,880 km, 1,555 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from RML to UBP?
A nonstop flight takes about 3h 59m 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 Ubon Ratchathani?
Ubon Ratchathani is 1.5 hours ahead of Colombo.
What is the cheapest way to fly from RML to UBP?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on RML–UBP that never appear on search engines, with no booking fees.