Clone a travel website/search engine

We are looking at cloning a website with a few improvements and the ability to scale up the number of flights that are searchable and include more countries etc. The site will allow you to type in a place of origin and a destination. The search engine will then go through every possible flight that would get you from that origin to that destination and give you the cheapest tickets available. You would be able to narrow down the search results by a time frame. You would also be able to link destinations with topics. For instance if your origin was LA and you wanted to go snow skiing you could type "las angeles to snow skiing" and it would bring up a list of destinations that have snow skiing and also give a the cheapest prices to get to each destination. There are quite a few more details. More information will be given on application. Unsure of what other job type selections I should be choosing as i'm not sure of the best way to go about the site is. Please advise.