The 747 disaster at Tenerife in 1977 was between two non-scheduled holiday flights. The KLM aircraft was with a mainstream longhaul aircraft which was operating a tour operator series from Amsterdam to Las Palmas and return. The Pan Am aircraft was a more ad-hoc arrangement, also with one of their regular long-haul fleet, with cruise ship passengers from Los Angeles, routing mainly for operational requirements via JFK also to Las Palmas, from where a Mediterranean cruise ship was to start.