And just in case it is taking longer, it is noted here:
While Free Character Migration is in progress
- You will be unable to cancel the transfer once initiated.
- You will be unable to log into the character until the transfer has been completed.
- The estimated time for transfer may be inaccurate and take longer than stated.
- Once your transfer completes, you will not receive a notification, but you will find your character if you log in to your new realm. If you cannot see your character on the new realm, create a level 1 to refresh your character selection screen.