title: travel comparison websites
body: <p>Just wondering how the travel comparison websites work, and how does one go about making one?</p>
  
  <p>by travel comparison websites I mean the websites that search other websites to find the different information about a particular flight and hotel and so on,</p>
  
  <p>How can a website search another website?</p>
  
  <p>any information would be helpful.</p>
  
  <p>Thanks </p>