Thanks. One more question:

I have a relatively tight connection in IAH to the last flight of the day to LAX, and then I depart from LAX back to EWR on an early morning flight. So if I have any delay issues that might make me miss the connection in IAH (and so no more flights to LAX that night), I suppose I shouldn't say anything to an agent about making my flight the next morning? (And/or say to an agent at LAX " I missed my flight because CO got me here late!")