Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Madison to Limerick as you normally would.
Madison Truax Field (MSN) is the airport you will fly out of if you book a flight from Madison to Limerick. You should not have trouble finding flights to Limerick from Truax Field; the airport handles an average of 0 outbound flights to Limerick per day. You should also have plenty of airline options to choose from since 1 airline has flights from the Madison airport to Limerick. It is only a 5.4 mi journey to Truax Field (MSN) from Madison’s city center.
Great question - MSN to SNN just means Madison Truax Field Airport to Shannon Airport. Now you’ll know what these unique codes when you look for flights! Cork Airport (ORK), Knock Intl Airport (NOC), Milltown (Kerry) Kerry Airport (KIR), Galway Airport (GWY), Waterford Airport (WAT) are other airports near this flight route and their unique identifiers/IATA codes.