Are there nonstop flights from New York (LGA) to Missoula (MSO)?

No. The fastest connection is via Minneapolis, about 4h 51m of total flying time.

What is the fastest connection from New York (LGA) to Missoula (MSO)?

via Minneapolis ≈ 4h 51m, via Chicago ≈ 4h 54m, via Denver ≈ 5h 21m (estimated flying time, excluding layovers).

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

LaGuardia Airport (LGA) to Missoula Montana Airport (MSO)・3,259 km

No nonstop flights. The fastest connection is via Minneapolis (MSP), about 4h 51m of flying time (layover not included).

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

None.

5 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.