Your e-ticket/flight ticket contains all the information you need to check in (online) for your trip. There is no need to print out your ticket, but make sure you keep your ticket in your files so you access it if necessary. You use your e-ticket to check in online or at the airport. For most airlines, you can check in online up to 24-48 hours before departure, and for some airlines this is mandatory. Check the airline you are flying with or go directly to the airline’s own website to check in online. Although we advise everyone to check in online, in most cases it is still possible to check in at the airport. For some airlines, online check-in is compulsory, otherwise you pay a surcharge.