Dan-Air Flight 1903 crashed into the slopes of the Montseny Massif in Catalonia, Spain, killing all 112 people aboard.

Dan-Air Flight 1903 was an unscheduled international passenger service from Manchester to Barcelona, operated by Dan Air Services Limited under contract with British tour operator Clarksons Holidays, which arranged for the flight to carry a group of holidaymakers who had booked an all-inclusive package holiday with the operator.

Montseny is a mountain range west of the coastal hills north of Barcelona. It is part of the Catalan Pre-Coastal Range.

Catalonia is an autonomous community of Spain, designated as a nationality by its Statute of Autonomy. Most of its territory is situated on the northeast of the Iberian Peninsula, to the south of the Pyrenees mountain range. Catalonia is administratively divided into four provinces or eight vegueries (regions), which are in turn divided into 43 comarques. The capital and largest city, Barcelona, is the second-most populous municipality in Spain and the fifth-most populous urban area in the European Union.