There's no discount, but you can use your Boingo account to pay for in-flight Internet: This is a nice move, long expected, which links up two popular offerings for business travelers. Boingo has a variety of service offerings which may include either unlimited or high-usage access to various parts of the globe. In North American, their $10-per-month plan provides unlimited use of terrestrial hotspots in the network.
The Gogo connection lets you use the same Boingo software, account, and linked credit card to pay for in-flight Internet access at the same retail rate as other passengers. One would hope Boingo could negotiate a better rate by reducing Gogo's marketing burden to bring customers in the future.