Are there nonstop flights from Monterrey (MTY) to Buenos Aires (EZE)?

No. The fastest connection is via San José, about 10h 31m of total flying time.

What is the fastest connection from Monterrey (MTY) to Buenos Aires (EZE)?

via San José ≈ 10h 31m, via Mexico City ≈ 10h 32m, via Panama City ≈ 10h 41m (estimated flying time, excluding layovers).

from 30,000 ANA miles, from 37,000 JAL miles (economy, one way, based on the published award charts).

Monterrey International Airport (MTY) to Ezeiza International Airport - Ministro Pistarini (EZE)・8,035 km

No nonstop flights. The fastest connection is via San José (SJO), about 10h 31m of flying time (layover not included).

With milesANA 30,000 miles+ (via PTY)JAL 37,000 miles+ (via DFW)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

11 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.