Originally Posted by
89703511961
I had hoped they'd be a quicker way as I'd like to book today and not have to keep checking.
I wonder if I book, and rang up to try up fare would that work?
I don't expect that you'd be able to up-fare after booking, but an agent should be able to book you the Basic L fare on a new reservation if (a) it exists; (b) they're well-trained; and (c) they're convinced you have a reason to do it.
I concur with the other posters; we're assuming you're trying to tweak mileage earnings in TK Miles and Smiles, and I think this would only work for international BE. Domestically, UA is going to report N no matter what BE fare you purchase.