How prevelant is Discover? Diners Club cards can use that network as well.

mrweasel · on Aug 31, 2014

Discover is non-existing in at least northern Europe.

American Express is a bad choice for many parts of Europe because companies are use to very low processing fees, and AMEX (and Diners Club) are very expensive credit card to process.

mseebach · on Aug 31, 2014

The Discover brand is non-existing, but Diners Club (which is owned by Discover) is somewhat popular.

rmc · on Aug 31, 2014

IME of Ireland & UK: Visa or Mastercard