How do I connect my Instagram account to my Facebook timeline?

To share photos from buy Instagram followers to Facebook:

iPhone/Android

1. Go to your profile
2. Tap  (Android) or  (iPhone) in the upper-right corner
3. Tap Share Settings
4. Tap Facebook and connect using your Facebook login info

Windows Phone

1. Tap the three dots at the bottom of the app > Settings
2. Swipe to Preferences and tap Share Settings
3. Tap Facebook and connect using your Facebook login info

Now, when you take a photo or video on Instagram, you'll have the option to share it on Facebook from the same screen where you add a caption.

You can also share from Instagram to a Facebook Page you manage.

Source :http://help.instagram.com/169948159813228/