A method and system for reserving future purchases of airline tickets using plural electronic options. The electronic options are used to reserve plural airline fares on a plural airline routes to plural destinations and a plural of fare classes for a pre-determined period. A final airline fare, route, destination and fare class is determined when the electronic option is actually exercised. All other reservations are automatically canceled. The method and system allows the electronic options to be purchased to book now and pay later for airline tickets and other travel related goods and services such rental cars, hotel rooms, event tickets, local attraction tickets, theme park tickets, etc.