Originally Posted by
diesteldorf
The regular Amex Platinum is a charge card and has no preassigned credit limit. Of course that doesn't mean it's unlimited, but it's independent from your Amex credit cards. If you have a $20,000 credit line, spread across 3 credit cards, applying for the Amex Platinum, a charge card, is not going to affect this.
My advice: Just apply for the Amex Platinum normally, or get a referral link from one of your friends that already has the card. If anything, closing your Delta Platinum right before applying for the Amex Platinum could make Amex like you less. Good Luck.
I am no expert, but I agree closing the DL Plat would likely hurt more than help with a regular Plat application. Unless one has a good number of Amex cards (some threads mention there is an unspoken limit?), there is no need to close one prior to applying for another, IMHO.
LAX