Originally Posted by
aradisc
The simple rule on this is: if a foreign merchant offers to process your CC transaction in USD or the local currency, always pick the local currency! If they don't offer, make sure to ask for it anyways! The POS device will have a much worse exchange rate than your CC that offers no FTF.
If the exchange rate is shown have a look at it though. I was offered it in flight on a flight on by UK card a few months ago and the exchange rate obviously hadn't been updated (As its not a live link, I guess it doesn't get updated very often) and I got about 1.60 for GBP to USD, when at the time it was around 1.49/1.48.