Are there nonstop flights from Haikou (HAK) to Kathmandu (KTM)?

No. The fastest connection is via Kunming, about 4h 13m of total flying time.

What is the fastest connection from Haikou (HAK) to Kathmandu (KTM)?

via Kunming ≈ 4h 13m, via Chengdu ≈ 4h 44m, via Chongqing ≈ 4h 48m (estimated flying time, excluding layovers).

from 18,000 ANA miles, from 23,000 JAL miles (economy, one way, based on the published award charts).

Haikou Meilan International Airport (HAK) to Tribhuvan International Airport (KTM)・2,689 km

No nonstop flights. The fastest connection is via Kunming (KMG), about 4h 13m of flying time (layover not included).

With milesANA 18,000 miles+ (via TFU)JAL 23,000 miles+ (via HKG)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.