The plains to Yantar, in real time, would be about a day and a half. The plains alone make up a large chunk of the zone, so just going from one end to the other would take hours, unless you're already right next to the Old Cordon. To save time, I'll recommend you start from there.

On that note, my character is just in that part of the Old Cordon. Ohhhhh, that gives me an idea.