MCO v SFB v MLB
Most UK and German charter airlines started to switched to SFB from MCO around 20 years ago - Thomson and Monarch being the first to switch.
UK airlines were offered greatly reduced landing fees at Sanford, and therefore many carriers relocated their operations.
Virgin and BA stayed put at MCO
Thomas Cook went back to use MCO in 2014.
TUI's latest move to MLB airport is to tie-in with their large cruise ship operation, with the MLB airport nearer Port Canaveral.
Downtown Orlando is around 45 mins drive from SFB, whereas it is around 75 mins from MLB
Jet2 are mooted to be going to Florida - as charter flights not LCC, so assume SFB or MCO.