Do you want to cancel a reservation with SAS airlines? Sas 24 hour cancellation rule allows passengers to get a full refund on cancellations that are done within 24 hours of their purchase, provided, the scheduled departure date is not more than 7 days from then. This rule applies to all sorts of tickets. This risk-free period helps the travelers avail the benefits of free-of-charge cancellations. This policy is made to facilitate easy and hassle free cancellations and provides maximum customer satisfaction.