Problem is the airlines are understaffed, especially at outstations, when it comes to a scenario where you're put on an earlier flight and the checkpoint is backlogged.

I once had a tight connection on Qantas where my domestic connection was an international tag-on - Upon arrival in the international terminal, a Qantas staffer made sure that I was able to jump to the front of the queue for security and got me straight onto the flight.

That is unlikely to happen here. In one scenario where I did queue jump at security I was flying DL at one of their outstations and making an international connection at CVG.

My original flight to CVG was delayed by the time I got to the airport, as the equipment was coming in from ATL. The DL ticket/check-in agent put me on a Comair flight departing in 15 minutes and told me to run for it.

I asked the agent if I could get an escort thru the security queue and was told they were understaffed; agent said just to run for it. I had Plat status FWIW and was also traveling up-front.

I run for the checkpoint and it is chock-block full; no elite line.

At this point I can either (a) wait and miss newly scheduled flight, or (b) jump queue.

I jumped queue as politely as I could (TSA was of no help, as I first asked them for assistance). I know I angered some - and I didn't have time to explain to each and every person, "I'm sorry, but I arrived at the airport well in advance of my departure, but Delta Air Lines re-booked me on an EARLIER flight due to irregular operations"

Had I not taken the earlier flight, I would have missed my connection. The earlier flight on Comair allowed me to get to CVG and make my connection to FCO .. (back when it was a seasonal non-stop).

SDF_Traveler