168 HOURS (7 DAYS) NOTICE OF CANCELLATION, prior to airport meeting time for 1 Day tours is required for a full refund; no-shows will incur a full charge. Fees assessed by the airline for name or date changes and any overage fees will be the responsibility of the guest. Refunds or partial refunds for tours, activities, flights, or venues that are cancelled due to reasons outside of our control (weather, force majeure, etc.) as well as refunds for extenuating circumstances will not be honored. In the event the helicopter tour must be cancelled for any reason, guests will be refunded for the helicopter tour and welcomed on an extended sightseeing land tour which includes a drive through Hilo town and a stop at Rainbow Falls. If guests wish to return to Honolulu earlier than their scheduled flight and/or decide not to continue on the land tour, a refund of helicopter portion (only) will be provided and additional taxi, airline change fees, or other expenses will be the responsibility of the guest.