Originally Posted by Aerotec
Strangely expedia.co.uk and travelocity.co.uk didn't show the price and when I came to book on ua.com it said I had to have a US registered credit card. I popped in my UK details and postcode and it let me put through the booking. ^
Be careful - make sure that it's actually ticketed. My experience is that there is no warning if your credit card details are incorrect, just that there is no ticket details against the itinerary. YMMV.