We can easily disable multiple address checkout option in Magento.
- Login to our Magento Admin Panel
- Go to System >> Configuration
- Go to Shipping Settings on the left menu under Sales section
- Set “Allow Shipping to multiple addresses” as “No“
- Then Save Configuration
After finishing all these steps, just flush the Magento cache & reload our page. That is enough.
This is a global setting in Magento. So this setting is not visible while browsing on store level. That means, the section System > Configuration > Sales > Shipping Settings is just visible if your level setting (on the upper left side of the configuration page ) is set to Default Config.