Are there nonstop flights from New York (LGA) to Ottawa (YOW)?

No. The fastest connection is via Montréal, about 1h 48m of total flying time.

What is the fastest connection from New York (LGA) to Ottawa (YOW)?

via Montréal ≈ 1h 48m, via Boston ≈ 1h 56m, via Toronto ≈ 2h 4m (estimated flying time, excluding layovers).

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

LaGuardia Airport (LGA) to Ottawa Macdonald-Cartier International Airport (YOW)・526 km

No nonstop flights. The fastest connection is via Montréal (YUL), about 1h 48m of flying time (layover not included).

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

None.

6 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.