AN A319 FLC LANDS ON RWY 25R VERSUS THE CLRED TO RWY 25L; WRONG RWY APCH LNDG; DURING A NIGHT OP AT LAS; NV.

Narrative

LATE NIGHT ARR AFTER LONG FLT FROM EAST COAST. CLRED TO FOLLOW ANOTHER ACFT TO RWY 25L. HADN'T FLOWN INTO LAS FOR APPROX 2 YRS. I LOST VISUAL WITH ACFT IN FRONT OF ME DUE TO ARPT LIGHTS; ETC. CONSTANTLY DOUBLECHKING LOC GUIDANCE TO RWY 25L. STRONG XWIND FROM L. APPEARED TO BE ON LOC FOR RWY 25L; BUT HAD BAD GS INFO THAT I WS TRYING TO FIGURE OUT WHY; RWY 25L ILS WAS SELECTED ON FMCG. I SAW ACFT TAXIING NEAR HOLD SHORT; BUT THOUGHT HE AND I WERE IN PROPER POS DUE TO THE FACT THAT THE RWY I WAS CONCENTRATING ON HAD A SIGNIFICANT DISPLACED THRESHOLD SIMILAR TO RWY 9L IN PHL AND THE VASI GS WAS KEEPING ME ABOVE THE ACFT I SAW APCHING SLOWLY FROM THE N SIDE OF THE RWY. I NEVER HEARD ANYTHING ABOUT LNDG ON OR APCHING RWY 25R UNTIL TAXIING IN. I SHOULD HAVE STUDIED THE RWY LAYOUT MUCH CLOSER AS I BELIEVED THERE WAS ANOTHER RWY TO MY R WHICH GAVE ME THE FEELING THAT I WAS ON RWY 25L VERSUS RWY 25R. I COULD ALSO HAVE USED ANY INPUT FROM THE FO WHO SAID NOTHING. IN OTHER WORDS I LANDED ON THE WRONG RWY WITH NO KNOWLEDGE OF IT UNTIL CLRING THE RWY.