Originally Posted by
Stainhead
Mrs. Stainhead travels with me frequently on business. I am a Plat, she a Silver, so for early-upgrade purposes I have taken to purchasing the tickets for us both together. However, for accounting reasons, it would be better to be able to pay for my ticket with one form of payment and for hers with a different one. Alex says: You may only use one credit card per reservation. If you have more than one traveler and want to pay with separate credit cards, we recommend booking separate reservations. According to my searches here, you cannot combine two PNRs post-purchase.
Am I out of luck?
Probably.. you could try calling and booking it over the phone to see if they are able to process using 2 cards, but I suspect not. This is one thing you could do with United pre-merger (and you could pay for awards from multiple accounts on the same PNR too).