Welcome to FT, EllieKarayan!

FT is not really a travel agency and we generally frown upon giving out specific recommendations for things like this.

Have a look in this thread for some general information regarding your query:

http://www.flyertalk.com/forum/infor...faqs-more.html

Since you do not seem to be looking for the likes of Google Flights or Kayak, I suggest picking up a copy of Business Traveller and looking at the adverts in the back, or your local Saturday/Sunday travel section, where you'll find plenty.