Hi,
I have built Travel Websites and it is not what you think is. Ticket Bookings, Holiday Packages, Hotels are all done through an Engine called Amadeus, WorldSpan, Galilio and Interglobe. They hold the Datbase of all the Airlines industry and it goes into these sites before booking the same. Similarly websites that book hotels also have a similar booking engine where the booings go directly to the websites.
So, you need to first Subscribe to either Amadeus or Worldspan and you will get the best rates from these booking engines.
We can only get the rates from other websites, but you cannot book tickets directly through their websites. IF you want to just compare the websites then it is a airfarecompare websites and it will only show the best fares among the websites,
So, please kindly elaborate more and can send you a Project Plan and take in onward
Best,
STG