Basic fares have certain restrictions placed upon them. For Basic fares, canceling 60+ days before departure incurs no fee. After that, within the 6 days prior to the departure, the charge is $99. Those tickets in Economy, Premium, and Business bundles have free cancellations. All tickets can be canceled within 24 hours of purchase for a full refund if they are bought a week in advance. https://www.adventuresfare.com/cancellation-policy/frontier-cancellation-fee/