easyJet
Very surprised easyJet never tried Palma from BOH which despite being up against Ryanair and TUI, pretty sure there is demand to be had. The route hits almost 20,000 passengers a month in summer. BFS and other UK regional airports manage all 4 big airlines including Jet2, easyJet, Ryanair & TUI on the Palma route for example.
Ryanair
Would not be surprised if Funchal, Belfast, Bucharest and Lisbon get added in for the summer season or indeed winter beyond that.