Many Burbank hotels have an airport shuttle service -- the spot where they pick up is closer than 700 yards away, much of it through a covered walkway. I drew a quick-and-dirty red line and an "X" on a Google satellite view:Google Earth shows the Marriott jiml mentioned is a 700 yard walk from the "station". Any others are at least another 1300 yards farther away.
Interesting, I would not have guessed that -- the Marriott seems farther away. (I worked for years in an office building along Empire, just southeast of the Marriott.)Not really shorter at all. The starting point for my 700 yard path was the center of the platform. Using the Google Earth rule tool, your path measures 640 yards and from your starting point the distance to the front door of the Marriott is only 560 yards. But yours is mostly under cover..