In which month will Mr Raveendran become eligible for guaranteed reservations up to 24 hours prior to departure?
He will be eligible if he is upgraded to A tier which needs 5 flights or journey of 12,500 km in last 6 or 12 month period. He will take his fifth flight in March and distance = 711 + 711 + 1407 + 1959 + 1081< 12,500.