Are there nonstop flights from Quito (UIO) to San Salvador (SAL)?

Yes. Avianca El Salvador fly this route. Flight time is about 2h 45m.

What is the fastest connection from Quito (UIO) to San Salvador (SAL)?

via San José ≈ 3h 18m, via Panama City ≈ 3h 35m, via Guayaquil ≈ 3h 42m (estimated flying time, excluding layovers).

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

Mariscal Sucre International Airport (UIO) to El Salvador International Airport Saint Óscar Arnulfo Romero y Galdámez (SAL)・1,915 km

Nonstop flights available (1 airline). Flight time about 2h 45m. Nonstop return flights also operate.

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

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.