If the airline limits the booking time for an air ticket, the payment deadline is indicated on the Kupibilet website.

Go to your Personal Account to the Orders tab. You will see the entire list of orders and their statuses. Next to orders awaiting payment, there is an explanation with the time remaining until the booking expires. If you do not pay for the order within this time, it will be canceled.

Please note that the payment deadline for an order may be shortened at the airline's request.