I just randomly checked Dublin to Rome route, for early December. The first 3 cheapest options are Ryanair, the 4th option (Air Lingus) is almost triple the pri

I just randomly checked Dublin to Rome route, for early December. The first 3 cheapest options are Ryanair, the 4th option (Air Lingus) is almost triple the price of the cheapest one, $262 vs $90 That’s your answer. People vote with their wallet.