Check-in is the passenger registration procedure for boarding. It is done before the flight and is a mandatory procedure for all low-cost flights. This consists of the verification of identity documents and travel tickets, as well as the issuance of the boarding pass.
Online check-in saves you additional costs and reduces waiting time at the airport. Check-in at the airport incurs additional fees (20-50 EUR). Online registration also offers you other advantages. For example, it allows you to select the desired seat on board the aircraft.
For some airlines, online check-in becomes available from 30 days and up to 3-4 hours before the flight if you select a seat. And if you don't choose a seat, online check-in becomes available 24-72 hours before the flight, depending on the conditions of each individual airline.
There are additional rules, which you must consult before departure and which may differ depending on the chosen airline. Some companies also provide travel assistance for unaccompanied minors.
If you are traveling with your dog, cat or other small pet, check-in will be different. Don't forget to study the check-in conditions for boarding and respect the conditions for transporting your pet.