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RML to WBU: distance & flight time
Colombo (Colombo Ratmalana Airport) → Boulder (Boulder Municipal Airport)
9,183 mi
14,778 km · 7,979 nm
18h 28m
estimated nonstop flight time
-11.5h
time difference · heading north
See live RML→WBU fares Phone-only fares on this route — call free
Flight time details
9,183 miles nonstop takes roughly 18h 28m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 11.5-hour time set-back when reading arrival times on your ticket.
The two airports
- RML — Colombo Ratmalana Airport · Colombo, Sri Lanka
- WBU — Boulder Municipal Airport · Boulder, 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 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 WBU
- DEN · Denver International Airport32 mi away
- BJC · Rocky Mountain Metropolitan Airport11 mi away
- FNL · Northern Colorado Regional Airport31 mi away
- BFK · Buckley Air Force Base34 mi away
Frequently asked questions
How far is RML from WBU?
The flight distance from Colombo (RML) to Boulder (WBU) is 9,183 miles (14,778 km, 7,979 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from RML to WBU?
A nonstop flight takes about 18h 28m 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 Boulder?
Boulder is 11.5 hours behind Colombo.
What is the cheapest way to fly from RML to WBU?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on RML–WBU that never appear on search engines, with no booking fees.