Flights are usually overnight from Atlanta to Ireland (arriving in the morning). The tour usually begins on Day 1 (October 19) after lunch. I would recommend you fly the night of the 17th and rest the day of the 18th in Dublin. If so, we would just add an extra night at the same hotel.
Day 1 below starts October 19

Trip Highlights:
• House of Waterford Crystal
• Cliffs of Moher
• Blarney Castle
• Giant's Causeway
• Glenadalough
• Titanic Belfast
Hotels:
• Clayton Hotel Cardiff Lane
• Dooley's Hotel Waterford
• International Hotel Killarney
• Ardilaun Hotel
• Everglades Hotel
• The Croke Park Hotel