At the height of the package holiday boom in the early 1970's Jets were all the rage for the Tour Companies to promote in their glossy summer brochures -
Trabajos Aereos del Sahara SA (TASSA) were long gone by this time but TASSA had developed their most important market with around 70 percent of all charters were to the UK.
By the 1970's the Spanish had Spantax at the forefront who then had mainly CV990's replacing their DC Props
Spantax had a bad crash at TCI with Germans on board, plus a series of other CV990 accidents/incidents
Air Spain DC-8's replacing their Brits
Transeuropa Caravelle replacing their DC-7's
TAE Caravelle 1-11 and DC-8's replacing their DC-7's
Aviaco Caravelle and DC-8's
Italy has SAM Caravelle replacing their DC-6's
Travel Club Upminster chartered Air France Caravelles for Perpignan, Nice and Corsica
Yugoslavia
Inex Adria DC-9 (Bad Yugotours crash with Germans on board over Zagreb)
Aviogenex TU-134A (Bad Yugotours crash with Brits on board at Krk airport)
JAT Charter 707 727 DC-9 (Air Yugoslavia)
Panadria DC-9
Holidays to Greece which was an exotic new destination were flown only on UK charter aircraft as there was only Olympic Airways then which flew to LHR.
Cyprus Airways and BEA mostly flew the holidaymakers to Nicosia as charter airlines were pretty much banned although IIRC BCAL did some VC-10 and 707 charters for Horizon.
Tunis and Djerba were mainly flown by UK charter airlines but I seem to recall some flown by Tunis Air Caravelles
Romania to Consanta, and Bulgaria to Bourgas and Varna holidays (Balkan and Sunquest Tours) saw them use mainly Russian stuff IL-18 IL-62 and TU-154's of Tarom and Bulgarian charters but Tarom & LAR Romanian Airlines used the 1-11 400 too.
Cosmos Holidays in their 1971 summer brochure had a big double page spread banner ''look what we've bought for you'' showing an artists impression of a Monarch Boeing 720B
Enterprise Holidays similarly had a BEA Airtours 707 spread
Clarksons proudly proclaimed ''All Jet holidays''