How does AMEX travel agency prices compare to Orbitz?

Considering getting an Amex Platinum Card and was wondering how the travel agency prices compare to discount sites (domestic travel)? I believe AMEX is a full service agency, which generally means they have higher prices.

So how do the prices compare to online discount places like Orbitz?

Yes, I think you're right on that one.... I agree that AMEX has higher prices. They're quite expensive.... I've booked trips both on line and with AMEX and there is a considerable difference.