This tutorial shows how to turn Airplane mode on/off in Windows 8 to enable or disable all wireless network connections at once. And You will only have the Airplane mode feature available on a Windows 8 device (ex: laptop, tablet, mobile phone, etc...) that has a wireless network connection (ex: Wi-Fi, mobile broadband, Bluetooth).

Method 1

1. Go to the Desktop.

2. Click on the Network icon in the taskbar system icons area at the far right.
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3. Move the sliders right or left to turn it on or off at the top of the Charms bar under Airplane mode.
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Method 2
1. Open the Charms bar, click on the Settings charm, and click on your wireless network icon.
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2. Move the slider right or left to turn it on or off at the top of the Charms bar under Airplane mode.
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Method 3

1. Open the Control Panel, click on the Network and Sharing Center link, and click on the Connect to a network link.
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2. Move the slider right or left to turn it on or off at the top of the Charms bar under Airplane mode.
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Method 4

1. Open PC Settings, and click on Wireless in the left pane.
2. In the right pane under Airplane mode, move the slider right or left to turn it on or off.
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From: eightforums.com