Upgrade Seat Assignment
 

Did a quick search but couldn't find anything on this. Apologies if I missed it.

It's been a while since I've redeemed UA miles. Trying to burn through the 50,000 balance I've got left. Just booked a trip from STL to SFO. Outbound has a connection through IAH. Used miles to upgrade the IAH-SFO segment. During the booking stage it allowed me to select First class seat. Not until after taking my credit card and confirming my reservation did it note that "Advance seat assignments are restricted for this flight. Please select a seat during check-in."

So am I to take it that I've got a confirmed first class seat on this flight or not? Will calling make any difference?

Thanks for any and all advice.

What does your on-line itinerary show? That should show if you are upgraded or not, or if there are segments waitlisted. Also, below it, it should show the seats that you are in.

If it doesn't look good, then call them if you have questions.

As with anything questionable, call UA and ask. Don't "take it" or "assume" stuff. Maybe it's good, maybe not.

Just went back into my reservation and was able to select a 1st class seat. Will keep an eye on this to make sure I don't lose it later on.

Thanks for the feedback.