how long can you hold a reserved fare on united?
AA will allow you to hold a ticket only for 24 hours. After you choose your flights it states: Farelock is a service that allows you to hold your itinerary and fare for 72 hours or seven days, for a fee, and is available on select flights.. I guess the key word here is select flights. It's never offered on all flights, and all legs of the flight must be on UA metal.