That's a straight EC261 claim for delay, 600 euro per adult, assuming the LGW-DUB sector was not an exceptional delay i.e. NATS and its understaffing

Rerouting via BOS and bus was appropriate as the alternative would have been a overnight stay in Dublin, or possibly several nights

Fill in the fields, and the issue section select EC261
https://www.aerlingus.com/support/cu...ravel-enquiry/