Join Date: Jul 2002
Location: Still going through ORD security when boarding has already started
Programs: AA EXP, UA Silver, HH Gold, Bonvoy Gold, IHG Plat, Hyatt Disco, Reno Air MEGA Platinum
Posts: 10,312
I have done this with United/Delta switches at the gate. You should have your FF number on your boarding pass, so if you change numbers, have them print new boarding passes reflecting your FF number, this also serves as a receipt should there be any problems down the road. I've never had a problem.
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"I just wanna wish you good luck, we're all counting on you"
-Dr. Rumack