Flying with Aer Lingus is easier when you understand the Aer Lingus Baggage Policy. The airline allows passengers one cabin bag up to the permitted size, along with a small personal item. For checked luggage, allowances differ depending on your fare and route. Business Class travelers often enjoy more generous baggage benefits. Aer Lingus also provides special guidelines for musical instruments, sports gear, and oversized items. By learning these rules in advance, passengers avoid extra charges and ensure their belongings travel safely to their destination.