My son flew from KHOU to KELP on Saturday, July 30, 2022., SW 3539. Some 30 miles east of KELP the pilot made several heading changes west then north then west then began the decent into KELP. For some reason, the plane flew west over KELP and continued west over the Franklin Mountains at approximately 6500’. The plane then turned 180 degrees and flew back east over the Franklin Mountains and again flew over KELP. Once the plane was east of KELP the plane turned west again and entered a left downwind for 08R and landed 08R. A very strange occurrence. I flew my plane into KELP earlier that morning and landed 26R. A NOTAM was posted for 26R/08L to be closed later in the day. No NOTAMS for 08R/26L were posted. Winds were light and variable most of the day. SW3539 was very early into KELP this day. As KELP is not normally a busy airport it seemed odd to have this type of approach to the airport. What could have been up with the flight, mechanical issue, runway issue, sudden wind change?