SideStep lets PC users running Internet Explorer download a plug-in that searches for flights, hotel rooms and rental cars while Expedia or Travelocity hunts for the same information in an adjacent window. The Repeat a Trip features allow travelers to book the same flight, hotel and rental car from a previous trip, and to synchronize itineraries with the personal calendars on their desktop or laptop computers.
Travelers enter where they want to go and how much they want to pay.