3.6mm stone in CT scan. Based on position is it near passing?

Have an international travel coming in 25 days. Really afraid of getting pain during the flight.

Based on the position is it near passing? Feeling some left flank pain for almost 2 weeks now. My appointment is in 1 week only. Is this a size that can block my urethra or is it passable?

Had a bunch of those through my life, but this is the first time I'm afraid because of this travel that it was long awaited.