Malaga, Spain

A rare combo of sea and snow in one weekend.

Ski resorts

Sierra Nevada: very sunny, best snow presumably in January

Itinerary by plane

easyJet from around 100eur (current price: ...)
SXF>AGP: Fri evening
AGP>SXF Mon evening

Sierra Nevada: 160km by car.
Car hire: 3 days from 70eur.