Are you allowed to Overnight At Dublin airport?or does the airport close?

A friend has a flight arriving at Dublin airport at 10pm in the evening and then has a flight leaving to his country at 9am on another carrier?and since he is in a tight budget was wondering if he could overnight at Dublin airport?or does the airport close?Is this even allowed.He doesnt want to spend money on a... show more A friend has a flight arriving at Dublin airport at 10pm in the evening and then has a flight leaving to his country at 9am on another carrier?and since he is in a tight budget was wondering if he could overnight at Dublin airport?or does the airport close?Is this even allowed.He doesnt want to spend money on a hotel just for a few hours and doesnt really want to go to the city.
so Are you allowed to Overnight At Dublin airport?or does the airport close?
10 answers 10