The interface is simple but well designed. There are hot buttons in the lower right hand corner of the map that allow you to zoom in on a particular region and then see all of the flight prices for that area. On the left hand side of the UI, you have a list of all the tickets you can buy and their prices, so you can scroll through the list and then purchase tickets when you're ready.
I love stuff like this because I think it's a good example of how a well designed RIA can give users more information while making it easier for them to complete a purchase. This gives users control over what they're willing to spend and shows them options in a fun way.
[Via Blog In Black]
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