Are there nonstop flights from Seville (SVQ) to London (STN)?

Yes. Ryanair fly this route. Flight time is about 2h 29m.

What is the fastest connection from Seville (SVQ) to London (STN)?

via Nantes ≈ 2h 58m, via Santander ≈ 2h 59m, via Madrid ≈ 3h (estimated flying time, excluding layovers).

from 15,000 JAL miles (economy, one way, based on the published award charts).

Seville Airport (SVQ) to London Stansted Airport (STN)・1,679 km

Nonstop flights available (1 airline). Flight time about 2h 29m. Nonstop return flights also operate.

With milesJAL 15,000 miles+ (via CMN)Economy, one way, estimate. Tap a connection for miles by cabin.

60 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.