Complex sentence: EasyJet focuses heavily on business passengers but operates a greater variety of holiday destinations than Ryanair, which often refers to EasyJet as a high fares airline but EasyJet often criticises Ryanair for its choice of airports.
Split into simpler sentences: EasyJet focuses heavily on business passengers but operates a greater variety of holiday destinations than Ryanair. Ryanair often refers to EasyJet as a high fares airline but EasyJet often criticises Ryanair for its choice of airports.