Are there nonstop flights from Quito (UIO) to London (STN)?

No. The fastest connection is via Amsterdam, about 12h 36m of total flying time.

What is the fastest connection from Quito (UIO) to London (STN)?

via Amsterdam ≈ 12h 36m, via Madrid ≈ 12h 49m (estimated flying time, excluding layovers).

Mariscal Sucre International Airport (UIO) to London Stansted Airport (STN)・9,239 km

No nonstop flights. The fastest connection is via Amsterdam (AMS), about 12h 36m of flying time (layover not included).

None.

2 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.