A. Online/web check-in is the process by which passengers confirm their presence on a flight via the internet and typically also print their own boarding passes. Depending on the Star Alliance member carrier and the specific flight, passengers may also select seats and confirm how much baggage they plan to check in at the airport.
Typically, online/web check-in is available on the airline's website as early as 24 hours before a flight's scheduled departure. Minimum time requirements for check-in, baggage check and boarding may vary, depending on the departure airport and destination.
Some Star Alliance member carriers require passengers to proceed to a check-in counter at the airport regardless of the check-in method used for document verification (e.g. to validate travel documents or to verify that the credit card used at purchase matches the identity of the person who made the purchase).