Originally Posted by
PTahCha
I guess it depends on the reason for IRROP. If it's weather related, they will only put you on their own metal. If it's within their control, the order is UA > *A > partners > OAL.
Although in your case, it sounds like it warrants a HUACA. I had to do that 3 times with the 1K line for a weather related issue.
In my case, the airport where I misconnected was IAH and there was no weather there, and the 3 flights I found on OAL were on schedule. The reason for the misconnect was a 3 hour delay at my starting airport due to insufficient crew rest because their flight from the previous night had arrived 3+ hours late.