Originally Posted by
CttleDog
Maybe a dumb question, but if I want UA to interline luggage on to another *A partner separately ticketed, does it matter when I check in for the second reservation with the *A partner? Should I do it before I check I check in for the United flight or after? Or does it not matter a all...
For baggage, it doesn't matter at all. It may impact UA's ability to issue an onward boarding pass, but in practice, those onward boarding passes issued by UA are often not accepted by the downstream carrier on separate tickets anyway.