Originally Posted by fwfdan
AMEX charges 2% conversion I believe - MC/VISA charge 1% plus many banks sometimes tag on addition.
I keep a Capital One card for travel because of this - last time I was in Europe (last spring) they did not have the additional charge. But it is not a rewards-type card...
Capital one is a good travel card because they do not markup the exchange rate (1% charged by VISA/MC). They are also helpful in resolving disputes with merchants.
Amex does not use the interbank rate and then adds a markup as well. My brother just received notice of a class action lawsuit against amex for these practices, which apparently were not properly disclosed in its cardholder agreement. IMO Amex is highly unethical but YMMV.