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Aer Lingus baggage rules set clear limits depending on your route and fare class. For mainline flights (European and transatlantic), passengers may carry one cabin bag up to 10 kg with dimensions no more than 55 × 40 × 24 cm, plus a small personal item (e.g., handbag or laptop bag) up to 25 × 33 × 20 cm. On regional (Emerald Airlines) routes, the cabin allowance drops to 7 kg and 48 × 33 × 20 cm, alongside the same personal item allowance. Carry-on rules differ by fare: Saver fares for European flights only include the small personal item; a 10 kg cabin bag requires purchasing “carry‑on with priority boarding” or will be gate‑checked for €35 . Checked baggage isn’t included on Saver fares within Europe, but Plus/Advantage/AerSpace fares offer 20 kg; transatlantic Smart/Flex provide one 23 kg bag (Business allows up to three)