INDIA - Are last minute tickets cheaper at airline ticket counter vs online? [duplicate]

I'll be coming by road and I'm unsure of my arrival time at the airport, at least till a couple of days before the date.

The departure and arrival airports are well connected through multiple airlines and multiple flights, and I have flexibility regarding the time of departure.

Is it better to scour the booking counters of multiple airlines for a great deal on last minute departures, rather than booking something like 24 hours before ?

I'm asking for India specifically, but any help is appreciated.