Use RatesToGo.com's "Wow20Off" code. Code is still good thru 8/9. I believe they are affiliated with Orbitz and are based out of Australia but they have a toll free CS number you can use here in the US. I am US based and use them all the time when they offer discount codes. The only thing is you have pay in AUD and you may incur foreign transaction fees unless you pay with a CC that does not charge any fees.