Cheap Aer Lingus Tickets from $606

Roam more of our amazing world with Aer Lingus. When you book your next flight through Travelocity, you’ll have access to an array of tempting destinations — along with some of the most affordable fares on offer. Adventure is just a few clicks away!If you’re itching to go on fun adventures and make unforgettable memories, take a look at the most frequently traveled international flight routes from Aer Lingus:

• London (LHR-Heathrow) to Dublin (DUB) with 134 flights every month
• Dublin (DUB) to London (LHR-Heathrow) with 134 flights every month
• London (LHR-Heathrow) to Belfast (BHD-George Best Belfast City) with 82 flights every month
• Belfast (BHD-George Best Belfast City) to London (LHR-Heathrow) with 82 flights every month

EI is the IATA code of Aer Lingus. Airlines from around the globe are assigned an IATA code by the International Air Transport Association. These two characters are used for many purposes, including timetables, tickets, tariffs and communications.

You’ll find a code somewhere in your travel itinerary, which will be emailed to you when you’ve finished your booking. Keep an eye out for the IATA airline code (which contains a couple of letters and a single digit) followed by one to four digits — your flight number.

Check-in and baggage drop times can be different between airports and airlines, but there are some rules of thumb. Taking off on a domestic flight? Usually, you can drop off your suitcase two hours ahead of takeoff. For international services, it’s more like three hours.