Are there nonstop flights from London (STN) to Saint Peter Port (GCI)?

No. The fastest connection is via Paris, about 1h 52m of total flying time.

What is the fastest connection from London (STN) to Saint Peter Port (GCI)?

via Paris ≈ 1h 52m, via Dublin ≈ 2h 9m (estimated flying time, excluding layovers).

London Stansted Airport (STN) to Guernsey Airport (GCI)・338 km

No nonstop flights. The fastest connection is via Paris (CDG), about 1h 52m 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.