At the counter at the airport or the ticketing office* Go to the airport and visit the Aer Lingus flight change counter.* Have your photo ID or passport, as well as any other required immigration documents, on hand for verification.* Request and pay the Aer Lingus change fee for changes to your flight depending on your preferences and availability.* After you pay, the representative will make the requested adjustments to your current Aer Lingus reservation.* The tickets will be delivered to your registered email address after confirmation.* Look over the updated travel itinerary, which states 'Aer Lingus modify date of Aer Lingus flight summary.'Read Also These Date Modification Option: Date Modification of Allegiant Airlines Flight | Date Modification of Alaska Airlines Flight