remember also if your flight is late you (with a short connection) are generally not allowed to get onto the next aircraft.

I flew MAN>DOH>CRK and my flight was about 5 minutes late, when i got off the aircraft, i had no extra security and the CRK flight was only about 2 gates away from the flight i arrived on (never happened before like this). QR refused to allow me to board the flight as my bags would not make it in time :/

I had could either wait 24 hour for the next CRK flight or transfer to the MNL flight about 8 hours later... went for the latter