Are there nonstop flights from Buenos Aires (EZE) to San Juan (SJU)?

No. The fastest connection is via Maiquetía, about 8h 4m of total flying time.

What is the fastest connection from Buenos Aires (EZE) to San Juan (SJU)?

via Maiquetía ≈ 8h 4m, via Punta Cana ≈ 8h 23m, via Santo Domingo ≈ 8h 33m (estimated flying time, excluding layovers).

from 17,500 ANA miles, from 37,000 JAL miles (economy, one way, based on the published award charts).

Ezeiza International Airport - Ministro Pistarini (EZE) to Luis Munoz Marin International Airport (SJU)・5,975 km

No nonstop flights. The fastest connection is via Maiquetía (CCS), about 8h 4m of flying time (layover not included).

With milesANA 17,500 miles+ (via BOG)JAL 37,000 miles+ (via MIA)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

12 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.