Getting out of the school parking lot took absolutely forever -- one of the reasons Elena usually stayed for at least half an hour in one or another of her classrooms and helped her teacher tidy up, or stayed with some of the girls on the cheerleading squad to practice, or... literally anything at all except try to get out of the parking lot right after school was let out. It was a nightmare, all those parents trying to get in to pick up their kids, and the students with their own cars like Elena trying to get out.
Once she was finally out of parking lot, it was only a little over half an hour for her to get to the mall closest to OSCA. She ran into the mall, sending a quick text to Clary to ask where she was. As she waited for a response, she started in the direction of the food court.