How do travel booking sites (travelocity, expedia, itasoftware) get the database of airline fares?<p>Do they purchase a service from someone that provides them with a stream of fares and updates or do they go scrape screens?<p>I had assumed they purchased a feed from someplace but then I saw "The O'Hare Affair", a programming puzzle on ITA Software's web page and it seems like they scrape screens.<p>Ideas?
I believe most of them use Amadeus<p><a href="http://www.amadeus.net" rel="nofollow">http://www.amadeus.net</a>
<a href="http://en.wikipedia.org/wiki/Amadeus_CRS" rel="nofollow">http://en.wikipedia.org/wiki/Amadeus_CRS</a>