The voucher expiration date cannot be extended or changed and does not cover taxes and optional services. The voucher is applicable to the flight-only portion of the base fare and cannot be redeemed for bags and other optional services. Restrictions may apply during peak travel periods, to certain destinations, and to certain classes of service. Vouchers cannot be applied to the following government taxes, fees and carrier optional services: (a) a segment tax of $4.20 per U.S. domestic flight segments (a flight segment is defined as one takeoff and landing) of a Customer's itinerary; (b) up to $18.00 for local airport passenger facility charges (c) a September 11th Security Fee of $5.60 per enplanement originating at a U.S. airport; (d) a Passenger Usage Fee of up to $22.99 per segment per traveling customer applies to most reservations excluding bookings completed at Spirit Airlines' airport locations as well as certain bookings to or from Colombia. A lower fee of $8.99 may apply to certain discount fares. International itineraries will be charged the applicable government taxes and fees (including U.S. government excise tax) of up to $180.00 per roundtrip. Additionally, if travel originates in a country outside of the U.S., additional taxes may apply (up to 22% of the applicable fare value per country). NOTE: Government taxes, and fees and carrier optional services are subject to change without notice. For a complete list of carrier optional services, please visit www.spirit.com. Travel does not need to take place before the expiration date, but the voucher must be applied to a new reservation before the expiration date.