Aer Lingus flies between: London - Dublin, Birmingham - Dublin, New York - Dublin, Orlando - Dublin, Chicago - Dublin, Boston - Dublin, Manchester - Dublin, Madrid - Washington DC, London - Malaga, Malaga - London, Washington DC - Madrid, New York - Shannon, Shannon - New York, Shannon - Boston, Boston - Shannon, Bucharest - Dublin, Alicante - Dublin, Barcelona - Dublin, Rome - Dublin, Tenerife - Dublin, as well as several other routes.
Aer Lingus' baggage allowance depends on the fare type you book and your destination. If you are flying within Europe, you are not entitled to any free checked baggage if you book a Low Fare, but you are if you book a Flex Fare (2 free bags) or Plus fare (one free bag). If flying to/from the USA, you will be entitled to at least one free checked bag weighing up to 50 pounds, to as much as 3 free checked bags in Business class. All passengers are allowed one carry-on and one smaller personal item.