The US web site seems to charge a $10.99 booking fee. Not good. But it also accepts Visa and MasterCards. You can book flights originating from anywhere in the World. Though European flights tend to be cheaper on the UK Travel site.

UK site: cheaper European flights, no booking fee but it only bills you in GBP so forex fee if you use a US or EUR card. Contrary to the US site you can only pay here with AMEX, no Visa or MasterCard.

EUR site? Theta's the question? Non existent? For example I checked the German site bit it let's you only book from selected airports, not good again. It can't even let you do a guest checkout, you can also only pay with an AMEX card.

So it seems AMEX is not very helpful for IDC IEC (International Euro Card) cardholders. Am I missing something?