New Delhi . Civil Aviation Minister Jyotiraditya Scindia has expressed concern over abnormal increase in fares on some air routes. In a meeting with the Airlines Advisory Group on Monday, Scindia insisted that airlines should self-monitor air fares on select routes, which have seen a significant increase. This specifically includes those air routes where GoFirst services were being provided earlier. A mechanism may be devised by the airlines to ensure fair pricing within the High Reservation Booking Designator.