Are there nonstop flights from New York (LGA) to Nassau (NAS)?

Yes. Delta Air Lines fly this route. Flight time is about 2h 36m.

What is the fastest connection from New York (LGA) to Nassau (NAS)?

via Washington ≈ 3h 12m, via Washington ≈ 3h 15m, via Fort Lauderdale ≈ 3h 23m (estimated flying time, excluding layovers).

from 15,000 JAL miles, from 30,000 ANA miles (economy, one way, based on the published award charts).

LaGuardia Airport (LGA) to Lynden Pindling International Airport (NAS)・1,781 km

Nonstop flights available (1 airline). Flight time about 2h 36m. Nonstop return flights also operate.

With milesJAL 15,000 miles+ (via DCA)ANA 30,000 miles+ (via YYZ)Economy, one way, estimate. Tap a connection for miles by cabin.

14 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.