This is off the deep end. I personally find the premise a little silly but the least you could've done is shown the two screenshots without injecting your own c

This is off the deep end. I personally find the premise a little silly but the least you could've done is shown the two screenshots without injecting your own commentary. And to answer the question posed in your last paragraph: Yes, you can do all of that. Kayak didn't invent that interface, that is, it's not patentable. Nor is most of what was done by Amazon, Ebay, etc. You can indeed create an identical copy of Amazon, as long as you leave off 1-click :)