Here are some examples on restrictions associated with low air fares as cited by the call-centre executives of the respective airlines:

nair deccan: A rescheduling charge of Rs 200 per ticket. Passengers have to pay the fare difference for the new date of travel. A 90 per cent refund on fare is available for cancellation 72 hours prior to departure.

nkingfisher: A charge of Rs 200 per passenger per trip for any change in schedule or cancellation. In the event of cancellation, the passenger receives a credit note that can be used for another flight within the next 13 months.

njet airways: A change in the Apex fare ticket would attract a penalty that can range from Rs 250 to half the basic price of the ticket.

nspicejet: A charge of Rs 500 per passenger per sector is levied on any change.