In general, when looking for the cheapest flight to Shannon, try to choose a flight departing in April for the best deal.
On average, from most locations, when planning your trip to Shannon, try to book your flight in the region of 52 days in advance for the cheapest prices.
From most locations, the cheapest flights to Shannon are found on a Monday. Booking a Saturday departure is usually the most expensive.
Typically, cheap prices to Shannon are most often found for noon flights. Cheap prices are less likely for morning flights.