As an example, I found seats departing Los Angeles LAX on Saturday, August 31, returning from Austin AUS on Tuesday, September 3, 2019.
This fare includes a carry-on bag plus one small personal item. A checked bag costs $30 each way.
Standard seat selection is included in this fare.
United's Basic Economy fare is $70 less, which comes to $201 roundtrip for these same dates. This will limit you to only a personal sized bag and will not include seat selection. First checked bag fee is the same $30 each way.
Looking for a place to stay in the Texas Capital? Here's what's available for the long weekend dates on Hotelwatchdog.