My son, finishing up a semester in Maynooth, Ireland, wants to visit Prague later this month. Ryanair doesn't seem to fly there. The best fares we found (so far) were about $300 on Czech Airlines and $430 on Aer Lingus, for May 21-26.

I thought flying to Frankfurt and taking the train to Prague might work, but ... would that be the best way? Suggestions appreciated!