Free WiFi Internet on Delta Flights in August

Delta Airlines is offering free wireless internet for the month of August.
Promo code is: DIETCOKEGOGO.
You have to connect to GoGo in-flight, buy a Gogo Flight Pass and enter code DIETCOKEGOGO at checkout to make it free.

Source: http://travel.exportfocus.com/index.php/2011/08/02/free-wifi-internet-on-delta-flights-in-august/

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