I'm sure papa Benny could afford a Ryan Air flight to Knock Aiprort, or even more likely, I'm err pretty sure Michael O'Leary would give him a free seat.
The Vatican has it's own airline so I don't think he'd have a problem getting a seat on one of his own planes. Obama used his own plane, but unlike Obama the Pope also has his own airport here. And as one of the largest (if not the
largest) landowners in the country I doubt he'd be short of a bed either. He's also got his own private army and his own armoured car.
It's none of those things that will stop him coming here next year. If anything it will be the bold faced temerity of your government to dare criticise the Holy See. They have vocally criticised the criticism, but they have yet to refute it!
Generations of their employees have abused generations of our children. They have given scant apologies for the abuse, and zero apologies for covering it up. I think it'll be a cold day in hell before they do, and seeing that they are happily blaming the devil for the 'scourge' of child abuse, I don't think hell is cooling down enough for that apology to even appear on the horizon yet.