Originally Posted by family friend

Hello All,
I have a question regarding the free same day standby offered on American Airlines. I currently have a ticket booked from MSP-STL-LGA that departs MSP-STL at around 4pm and STL-LGA around 7pm. Would it be possible for me, space available of course, to fly standby MSP-STL that morning and keep the STL-LGA leg at approximately 7 in the PM? Many thanks.