Are there nonstop flights from London (STN) to Hondarribia (EAS)?

No. The fastest connection is via Barcelona, about 2h 52m of total flying time.

What is the fastest connection from London (STN) to Hondarribia (EAS)?

via Barcelona ≈ 2h 52m, via Madrid ≈ 2h 57m, via Edinburgh ≈ 3h 15m (estimated flying time, excluding layovers).

London Stansted Airport (STN) to San Sebastián Airport (EAS)・960 km

No nonstop flights. The fastest connection is via Barcelona (BCN), about 2h 52m of flying time (layover not included).

None.

7 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.