Are there nonstop flights from Kolkata (CCU) to Phnom Penh (KTI)?

No. The fastest connection is via Yangon, about 3h 32m of total flying time.

What is the fastest connection from Kolkata (CCU) to Phnom Penh (KTI)?

via Yangon ≈ 3h 32m, via Bangkok ≈ 3h 33m, via Bangkok ≈ 3h 33m (estimated flying time, excluding layovers).

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

Netaji Subhash Chandra Bose International Airport (CCU) to Techo International Airport (KTI)・2,152 km

No nonstop flights. The fastest connection is via Yangon (RGN), about 3h 32m of flying time (layover not included).

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

None.

12 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.