EMILY: You look flushed.
RORY: I ran from the bus stop, I’m okay.
In the very first episode of Gilmore Girls, Emily said that Chilton was five minutes from their house. That may have been an exaggeration, but the show has always implied that Rory’s grandparents lived within walking distance of her school. Now she seemingly has to catch a bus to reach her grandparents’ house.
Perhaps their house is 5 minutes drive from Chilton, or around 20 minutes walk. It’s possible Rory usually walks the mile or so to get there, but took a bus this time, worrying that she would be late for dinner.