It looks like the inbound was late due to prior ATC delays. The inbound definitely took a less than straight routing to get to LAS and took about 25 min longer than usual. See
https://flightaware.com/live/flight/...714Z/KPHX/KLAS. Ditto with the flight before that SNA-PHX. See
https://flightaware.com/live/flight/...455Z/KSNA/KPHX.
PHX 1004A A13
LAS 15 1 D10 1118A 1208P 1 D10
PHX A3 129P
3PHX/ETD1020 LAT-LATE ARRV A/C DUE TO PRIOR AIR TRAFFIC DELAYS-I *1352*HDQEU1
4PHX/OUT1020 OFF1038 LAT-LATE ARRV A/C DUE TO PRIOR AIR TRAFFIC DELAYS-I *1352*HDQEU1
2LAS/IN1151 *1352
3LAS/ETD1241 LAT-LATE ARRV A/C DUE TO PRIOR AIR TRAFFIC DELAYS-I *1354
4LAS/OUT1238 ETO1445 *1608
2PHX*/ETA1550 *1608