Expedia!

The first thing I notice with Expedia is some representation consistency issues.  After I put in my locations, it asked me (repeatedly) if my times were flexible (which of course they are) but then it asks me to select my destinations again from a list!

At this point I noticed that there were a lot of things it asked me repeatedly, like if I wanted to book a car, or a hotel.  Annoying, but presumably in line with their business model.

While their website is very cluttered, it does a pretty good job of mitigating that.  The parts of the page that I actually cared about were highlighted or bolded, and the top of the page has a nice navigational bar that conforms to my expectations.  When I got into the activity I wanted, it did a good job with layout, with a good flow and noticeable, if inconsistent, labels and headings.  It uses arrows for links that take me to the next page, which is intuitive.  It numbers headings when appropriate, and it sequesters summary/navigation tools in the side bar or the top of the page.

In general, Expedia is cluttered and annoying, but it does a good job showing me what I should do to navigate the crap