My wife (who is also a 1K) has run into a bit of bad luck. Due to weird circumstances, she is making a connection in PHX from an AS flight (award ticket from BA) to a paid non-refundable UA ticket. She originally had a 2 hour connection, but AS has moved the flight so she now has a 23 minute connection. BA is unsympathetic, and says there is nothing they can do to move her flight because it hasn't changed by 2 hours or more. Also, there is now no AS award availability on the earlier flight that day.

Both airlines operate out of the smallish Terminal 2 in PHX, so I think the odds are good that she could still make this connection. But, obviously, it wouldn't be surprising if something went wrong. If it does, and she arrives after the UA flight has left, what is UA likely to do for her? Are there published rules governing this stuff, or is it ad hoc? I assume her 1K status would help. Thanks.