Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Peoria, Illinois to Galway as you normally would.
For a flight from Peoria to Galway, you will be flying from Greater Peoria. Greater Peoria (PIA) is just 6.0 mi from the center of the city. Greater Peoria is the only Peoria airport and it handles 0 outbound flights to Galway per day. 0 airlines have flights to Galway from Greater Peoria on a regular basis.
Greater Peoria Airport is PIA and Shannon Airport is SNN. These codes are created by the International Air Transport Association (IATA) and airlines use them to identify the departing and arrival airports in the flight routes they service. This flight route has multiple associated airports, so we think it might be helpful to learn the name and codes of them as well. They are Knock Intl Airport (NOC), Milltown (Kerry) Kerry Airport (KIR), Galway Airport (GWY).