Good Morning Houston;
Tracking N96UT this morning from DSM to SBP.
Before departure the SBP airport page lists ETD and ETA as 0845CDT and 1019PDT.
On the DSM airport page the times shown are different, 0857CDT and 1031PDT which is also what the airplane page shows.
The time have been different for at least 30 minutes since I started watching the morning rush at SBP… 
John in Saudi