Distance From Roundup Airport to Bandaranaike International Colombo Airport, RPX - CMB Distance

The distance from Roundup Airport (RPX) to Bandaranaike International Colombo Airport (CMB) is 8693 miles or 13991 kilometers or 7549 nautical miles.

The distance shown below is direct flight distance between airports. Straight-line distance does not account for the surface between the two points. It is the distance a bird or airplane would travel between the two points when flying above the surface. The straight line distance is the direct route between two points, regardless of whether or not there are roads that connect them.

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How long does it take to travel from Roundup ( United States ) to Colombo ( Sri Lanka )?

A one-way nonstop (direct) flight between Roundup and Colombo takes around 19 hours 59 minutes.

Estimated flight time from Roundup Airport, Roundup, United States to Bandaranaike International Colombo Airport, Colombo, Sri Lanka is 19 hours 59 minutes under avarage conditions. Your actual flying time may vary depending on wind direction/speed or weather conditions. This calculation does not include the departure and landing times of the aircraft. In addition, it does not cover the person identity check, ticket check-in and baggage collection times at the airport.

Travel Distance Between the Airports • RPX - CMB

Kilometers		13991 km
Statute Miles		8693 miles
Nautical Miles		7549 nm
Avg. Time of Flight		19 hours 59 minutes

Roundup Airport to Bandaranaike International Colombo Airport Flight Route Map - RPX to CMB Flight Path

Location of Roundup Airport & Bandaranaike International Colombo Airport is given below.
Click the map to view Roundup to Colombo nonstop flight path and travel direction.

Click to see flight route on Google Map between Roundup, United States and Colombo, Sri Lanka. .

Nonstop flight route between Roundup, United States and Colombo, Sri Lanka.

Time Difference Between the Airports • RPX - CMB

Time difference between Roundup (United States) and Colombo (Sri Lanka) is 10 Hours 30 Minutes.
Colombo time is 10 Hours 30 Minutes ahead of Roundup.

Location	Local Time
Roundup (United States)	2026-03-19, 09:59:45 CDT
Colombo (Sri Lanka)	2026-03-19, 20:29:45 +0530

Why should you arrive 3 hours before international flight? Flyers who are traveling to an international destination should arrive at the airport earlier than domestic flyers. This is because international flights can have additional check-in requirements, like passport verification, that need to be completed before you receive your boarding pass.

Origin

Roundup Airport (RPX / KRPX) Roundup, United States

Destination

Bandaranaike International Colombo Airport (CMB / VCBI) Colombo, Sri Lanka