Transit Time (previously known as Shipping Time) is the time between when you hand the order over to your carrier and when it's delivered to the buyer's address. Transit time is part of the delivery time calculation displayed on the offer listing and checkout page:
Total Delivery Time = Handling Time + Transit Time (+ any holidays)
If you use Shipping Setting Automation, then Amazon manages your transit time based on your ship-from address and your carrier preferences. If you have opted to manually define your transit times, then follow these steps to modify them:
To view the default transit times, see Default transit times.