Hi,
I read your specifications and have similar experience, in extracting airfares from various websites. It is something like aircompare websites where we internally extract the fares from various destinations and then show it in our website ordering from the lowest to the highest,
Once they click on the fares, we can take them to the websites which show the fare "directly" to the booking page with all the information populated from the website,
We need to crawl to the website to get the information of the fares, some webstes give us an API to do this task, but some give us a url as welll,
There are much more websites that do air fare compare and give the lowest fares , and we can search the fares from Ryanair, Easyjet and TAP, and the the Travel Companies as well,
I shall review the sites and shall send you the possibilities to crawl or use their api to get the information from the websites,
The site can be built in PHP and Mysql and possible deliver time is 15 days and 2 days testing,
We send you daily updates and update to your webserver the work done every day for your reviews and comments,
Please advice if can send you a project plan in brief ,
best regards,
TGS