Originally Posted by
emcampbe
To be fair, a willing UA agent at IAH should be able to do this no problem, presuming availability. Whether one finds a willing agent is a completely different question.
That’s not really true. It’s not even clear what “availability” means in this context; OP is in K on IAH-RSW but G on RSW-YYZ. UA can print an IAH-YYZ boarding pass, but it won’t validate because there’s no HOU-YTO fare to match it.
All of this is possible — and standard in IRROPS — but it’s definitely not “no problem.”