Are there nonstop flights from Boston (BOS) to Hanoi (HAN)?

No. The fastest connection is via Beijing, about 16h 28m of total flying time.

What is the fastest connection from Boston (BOS) to Hanoi (HAN)?

via Beijing ≈ 16h 28m, via Seoul ≈ 17h 3m, via Hong Kong ≈ 17h 4m (estimated flying time, excluding layovers).

from 40,000 ANA miles, from 47,000 JAL miles (economy, one way, based on the published award charts).

Boston Logan International Airport (BOS) to Noi Bai International Airport (HAN)・12,937 km

No nonstop flights. The fastest connection is via Beijing (PEK), about 16h 28m of flying time (layover not included).

With milesANA 40,000 miles+ (via IST)JAL 47,000 miles+ (via ICN)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

15 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.