Originally Posted by
1KHI
Also, note that a flight operated by United but on CO stock, SDC using CO rules might be possible by calling continental if the same fare class is available.
However, I don't know whether UA opens up all fare classes at 3.5 hours before departure.
I wonder how pratical or real this policy is these days and age since flights are operating usually at full or almost full capacity. While I generally clear on standby at the gate, I NEVER had any success confirming with UA or CO even within 3.5 hours before departure. Maybe others have greater success. I usually fly out of LGA and connecting through ORD.