I am from the Netherlands and I know that similar questions were frequently asked but unfortunately, it seems like no one is in the exact situation I am. I went to New York last year, just for a week, so I had to apply for an ESTA and got one. An ESTA is valid for 2 years and for 90 days at a time.
Now, I got an J-1 visa to study one semester in California (January - May). There's a 30 days 'grace period' after the J-1 expires but I wonder if I'm allowed to stay longer (just a few days actually) because I already have an ESTA. I feel like I won't need to go to Canada (like other people do to apply for an ESTA and re-enter the US) but I want to be 100% sure that I'm not obligated to leave within that 30 days, before I book my return ticket.
Does anyone know the answer?
Warmest regards, Jascha