1. Turkish Airlines web check-in pass service is available to passengers on the official website . 2. Passengers can check in for a flight online for 24 hours before departing as for domestic flights internet check-in opens 3 hours before the departure . 3. All passengers are required to have their documents ready at the airport check-in counter for the boarding process. 4. It is possible to book seats, add a baggage packs for the plane, and upgrade tickets if it is necessary during web check-in. 5. After completion of the process, the boarding pass will need to be printed at the airport and shown before boarding. The passengers usually charged for lesson for those who did not complete the process prior checking-in at the airport.