Bengaluru
Kempegowda International (BLR) sits at Devanahalli, north of the city — and further still from the tech corridors most passengers on this sector are travelling out of. That geography, more than anything to do with fares, is what derails last-minute BLR–DEL bookings: the seat is available, the price is workable, and the traveller simply cannot get there in time. Four carriers — IndiGo, Air India, Akasa Air and SpiceJet — run roughly 43 departures a day between them, which means the useful discipline when you are booking inside 24 hours is to fix your realistic airport-arrival time first and then take the first departure that clears it, rather than the cheapest row on the list.