Bengaluru
Kempegowda International (BLR) sits at Devanahalli, well north of the city — the single biggest variable in a same-day BLR–BOM plan. The drive from Koramangala, Whitefield or Electronic City can swallow more time than the 1h 50m flight itself, so when you are booking inside a few hours, work backwards from the check-in cutoff rather than forwards from the fare. IndiGo carries the bulk of the daily BLR–BOM schedule here, with Air India, Akasa Air and SpiceJet filling out the morning and evening banks. Those two banks are where a short-notice search usually finds its seat — and where the seat goes first.