Aer Lingus lets you change your booking in the first 24 hours without any extra cost. The Aer Lingus change flight policy helps people feel relaxed about travel. If your plans change soon after you book, you can go online and change your flight fast. After the first 24 hours, an Aer Lingus change flight cost or change flight fee might be added, depending on your ticket and where you want to go. The policy also lets you update your return flights, so you can change one or both parts of your trip if needed. It's a good idea to read the fare rules before you confirm any changes. Aer Lingus wants every person to feel good about their trip. The airline gives more options for every schedule and helps you feel good about choosing when and how you travel.