As stated on this article on wordpress.org, the best way to do a WordPress migration, as long as the URLs and domains are staying exactly the same, would be to follow these instructions.
Moving your domain without changing the Home and Site URLs of your WordPress site is very simple, and in most cases can be done by moving the files.
- If database and URL remains the same, you can move by just copying your files and database.
- If database name or user changes, edit wp-config.php to have the correct values.
- If you want to test before you switch, you must temporarily change “siteurl” and “home” in the database table “wp_options” (through phpMyAdmin or similar).
- If you had any kind of rewrites (permalinks) setup you must disable .htaccess and reconfigure permalinks when it goes live.
- If you are changing to a new server but same domain, all you need to do is edit wp-config.php with your new database/user information and upload everything as it is to your new server.