I have to say, I was re-accomodated out of ONT. The last ONT-PHX flight cancelled, and the rebooked us on Southwest. We just went over to their counter, surrendered the HP BP and was given a SW BP. Very simple. Yet, when a flight got cancelled in PHX due to mechanical.. they said they have no inter-line with SW nor any way to re-accomodate us... strange the answers u get at different places.