Flatonia is a great spot for a stop on the Sunset Ltd. Get your map:
Austin is only about 80 miles northwest, not far at all by Texas measuring. Of course, Austin is huge, 900,000 city pop, another million in the metro. But it does have a busy airport.
Victoria is only 70 miles due south. It's not nearly so big, about 115,000 in the metro, with only 5 highly-subsidized "Essential Air Service" daily flights going to Austin.
Leave Houston at 7:05 p.m., it's five hours to San Antonio, so let's say, stop in Flatonia around 9 p.m. where your friend will pick you up. Get back to the UT campus in Austin well before midnight. Helluva lot nicer than asking your ride to go all the way down to Houston and back, or to pick you up in San Antone after midnight. (Neither of those highways are the pride of the Lone Star State.)
Coming from the west, San Antonio is scheduled for 6:25 a.m. (but it ain't so reliable, know what I mean?) So who's gonna ask their brother-in-law to get up very early to drive from Victoria to pick you up in San Antonio? But asking relatives to meet you in Flatonia at 9 a.m. doesn't seem unreasonable.
To be fair to the Aggies, the A&M campus at College Station is about 110 miles northeast of Flatonia, no worse than Houston and without the traffic. So a Flatonia stop could improve the lives of students and others coming in from New Orleans or Tucson and beyond.
And excuse my oversight here, but Texas State at San Marcos is also an hour or two away, WNW. The Sunset Ltd's service hours in Flatonia work much better for those 36,000 students than the San Antonio times.
Flatonia will be a worthwhile stop, even if it is a remote little town out in the middle of miles and miles of wildflower fields.