Are there nonstop flights from Buenos Aires (EZE) to Quito (UIO)?

Yes. Avianca Costa Rica, Avianca Ecuador fly this route. Flight time is about 5h 39m.

What is the fastest connection from Buenos Aires (EZE) to Quito (UIO)?

via Lima ≈ 6h 17m, via Guayaquil ≈ 6h 20m, via Bogota ≈ 7h 21m (estimated flying time, excluding layovers).

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

Ezeiza International Airport - Ministro Pistarini (EZE) to Mariscal Sucre International Airport (UIO)・4,373 km

Nonstop flights available (2 airlines). Flight time about 5h 39m. Nonstop return flights also operate.

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

8 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.