As per Air Serbia Cancellation Policy, the passengers are allowed to cancel their Air Serbia flight reservation up to 3 hours before the flight's scheduled departure time, but they are required to pay cancelation charges. In case, travelers cancel their Air Serbia flight reservation within 24 hours of the ticket purchase or 7 weeks before the departure date, then they need to pay cancellation charges. Having any query related to Air Serbia Flight cancellation so just make a call on Air Serbia Customer Service 1-800-364-9405 anytime for more details and executives are there to help you 24*7.