Originally Posted by emcampbe

Can't speak to AmEx biz card, but the personal plat requires you to put the entire cost of the trip on the card in order for the coverage to activate - there is a small list of items you can combine it with - but all are basically airline credit. So spitting cost between two cards would mean Amex wouldn't cover it. I would generally assume the biz card would have the same stipulation, but can't say for sure so check the details of the coverage to find out.

Chase only requires you to put a portion of the cost on the card, so could work with that, I guess?