I type "fly from to somewhere" and right below the three paid ads there is nicely framed rectangle that says "sponsored" and links to Google's site itself. If I click there I just get a list of flights with prices etc.
If I do this and build an ad it would be disapproved as bridge page providing bad user experience, plus there would be a huge risk of losing an account forever.
I know, this has been mentioned before about other industries, but I wanted to mention it, ask:
Is it a bridge page or not?