I trust Jet, but kingfisher is not bad either. check for the operations the
day before and on that day before you head to the airport.
better if you can take an early flight, but if not keep in mind the
transfer shuttle buses run on-the-hour every hour.
Check all your flight options on
www.flightstats.com - you can see the flights' statistics if you sign up for an account, under "extended details".