I’ve been stewing on this one for months and months. I think I even wrote to Google once, but never heard anything back. Unfortunately you can’t move the marker. I originally thought it was just the Landmark that caused the problem, so I pulled it and placed one over just the terminal. That stopped one of the errant search results, but not the Google one. Shortly thereafter, Shawn completely replaced my terminal landmark for some reason, and added the big unnamed one over the whole thing. I was hoping that would solve it, but here we sit, seemingly stumped again. 
I also found that removing a little parking lot stub at the corner of Sherman Way and Clybourn reduced, but didn’t eliminate, the incidence of these misroutings. Someone had recently added it back, and that may have helped bring about some of these new URs. Hard to say.
I can easily imagine how frustrated I’d be if I was running late for a flight and Waze took me 10 minutes out of the way, around the back of the airport.