"Clayton Hotel Dublin Airport is our go-to for the last night in Ireland when flying home to the US. It's busy but well-organized and has everything we need. We drop off the bags (free parking for 90 mins), then take the rental car back... have dinner at the hotel, get a good sleep, and take the hotel shuttle to the airport in the morning. The hotel has several options for food and drinks, and the shuttle runs often... 24/7 I think."
"Everything was great but again remember there are clubs across the street and there is nothing the hotel can really do about the traffic control outside, so there’s honking between 3-4:30am. Maybe ask for a room in the back or bring ear buds unless you sleep like the dead you should be fine. Other than that caveat I really loved staying here."