You’ll have a real tough time finding a true June 15th move-in. For that, it’s going to either be apartments lying around unrented because of some serious issue, luxury apartment highrises that have availability and start whenever, or yes a sublet.

Best thing if you really don’t want to move twice is to find a sublet that you like and can renew in the Fall cycle.

Otherwise you can look around late April/early May. Usually 30 days before your desired move in date is the best time.