Does Allegiant have a 24 hour ????(????????????) ????????????-???????????????? refund policy? Allegiant 24-???????????????? ???????????????????????????????????????????????? ???????????????? ????(????????????) ????????????-???????????????? (24 ???????????????? ????????????????????????) provides within customers may cancel their flight reservation or make changes without any charge. This feeless cancellation option is essential if you need to change plans soon after purchasing a ticket. Importantly, the Allegiant 24-hour refund policy ????(????????????) ????????????-???????????????? (24 ???????????????? ????????????????????????)can only be applied seven days or 168 hours before the flight.