Originally Posted by
SEA1K4EVR
Same day change is for UA operated flights and you must keep the exact same routing. Ordinarily I would say that may have success doing what you propose on the day of the flight at the airport in BOS on a standby basis (changing over to UA metal), but I think your chances are going to be zero because of the separate PNR issue. The fare you paid for your 2nd itinerary has it starting at YYZ, not BOS and allowing you to essentially skip that segment and fly BOS-ORD isn't likely to fly.
so for my scenario, it should work no?
sfo-den-tpa (all ua metal adn tix) with my den-tpa* leg giving me just a 37 minute conx/turn at tpa so i should be able to ask about changing to the earlier den-tpa flight 4 hours prior, right? (and it would be 4 hours prior to my original den-tpa flight not my sfo-den flight? not that it matters as i have to do it at sfo and not over the phone-or can i? [and if so, is there a profile code in case the agent has a brain freeze or simply ask about the "same day confirmed change"]) sorry to sound like such a rookie but i've never done a confirmed same day change
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*the earlier flight den-tpa pried out way to high