On Special Discounted
The sentence "Find information on special discounted airfare", why isn't "with" in place of "on"?

Question

Answer

Dan's right. WITH sounds like you are USING something.

I find information ON Google but WITH my glasses on, with difficulty (sometimes), and with my laptop switched on and charged up.

Answer

It means information ABOUT a special offer. The information might be "Good only as part of our travel package."

Once I hear "Find information WITH," 
I expect to hear a TOOL or a METHOD.

"Find information with our travel website."