Are there nonstop flights from Islamabad (ISB) to Colombo (CMB)?

No. The fastest connection is via Lahore, about 4h 34m of total flying time.

What is the fastest connection from Islamabad (ISB) to Colombo (CMB)?

via Lahore ≈ 4h 34m, via Karachi ≈ 5h 7m, via Muscat ≈ 6h 35m (estimated flying time, excluding layovers).

from 15,000 ANA miles, from 23,000 JAL miles (economy, one way, based on the published award charts).

Islamabad International Airport (ISB) to Bandaranaike International Colombo Airport (CMB)・3,021 km

No nonstop flights. The fastest connection is via Lahore (LHE), about 4h 34m of flying time (layover not included).

With milesANA 15,000 miles+ (via BKK)JAL 23,000 miles+ (via DXB)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

10 one-stop options, sorted by estimated flying time. Tap one to see the airlines on each leg and booking links.

Times are estimated from distance. Check schedules, frequency and availability with the airline or a booking site.