My mother took the afternoon EI flight to JFK today and was surprised to discover that it does not use the much-promoted pre-clearance.
EI109 - DUB - JFK
EI139 - DUB - BOS
Both don't use pre clearance in Dublin. No idea why.
All other Aer Lingus US flights us it here in Dublin.
Aer Lingus: Travel Information - US immigration
There is still officials from Air India due in Dublin in the next 3 - 4 weeks.