A 4-star airline rating and a rewarding loyalty program are just the beginning of reasons to book a flight with Aer Lingus. This flag carrier is based out of Dublin Airport (DUB), has a fleet of around 52 aircraft and is the only airline in the world to name their planes after Catholic Irish Saints. Take a peek at Expedia's Aer Lingus flight deals to thrilling destinations. Whether you travel in business, business Flex or Economy Saver, Smart, Plus, Advantage, Aerspace, you'll get the high level of service this preferred carrier is known for.