Do not use Aer Lingus to fly to Edinburgh! They do not have ticket agents at that airport, and if you are not checked in online (which is not always available), you may get booted off the flight and there's nothing the folks who check your bag can do about it. The employees there made it clear that they are not ticket agents and all they can do is print a boarding pass and put your baggage tags on. I had to buy another flight to get home. Aer Lingus customer service accused me of being late for the flight and then insisted that I had used the original flight and was not eligible for compensation. I had receipts. Terrible. Find another airline.