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IAH to RML: distance & flight time
Houston (George Bush Intercontinental Houston Airport) → Colombo (Colombo Ratmalana Airport)
9,874 mi
15,891 km · 8,580 nm
19h 50m
estimated nonstop flight time
+10.5h
time difference · heading north
See live IAH→RML fares Phone-only fares on this route — call free
Flight time details
9,874 miles nonstop takes roughly 19h 50m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 10.5-hour time gain when reading arrival times on your ticket.
The two airports
- IAH — George Bush Intercontinental Houston Airport · Houston, United States
- RML — Colombo Ratmalana Airport · Colombo, Sri Lanka
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 IAH
- DWH · David Wayne Hooks Memorial Airport14 mi away
- IWS · West Houston Airport23 mi away
- AAP · Andrau Airpark23 mi away
- HOU · William P Hobby Airport24 mi away
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
Frequently asked questions
How far is IAH from RML?
The flight distance from Houston (IAH) to Colombo (RML) is 9,874 miles (15,891 km, 8,580 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from IAH to RML?
A nonstop flight takes about 19h 50m 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 Houston and Colombo?
Colombo is 10.5 hours ahead of Houston.
What is the cheapest way to fly from IAH to RML?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on IAH–RML that never appear on search engines, with no booking fees.