After 18 months, Gogo Inc., a provider of WiFi on airplanes, began trading on the New York Stock Exchange this morning.

The Itasca, Ill., company, which filed for a public offering in December 2011, priced its shares last night at $17 — at the high end of the expected range.

Gogo can raise as much as $215 million if the IPO is over-subscribed, it said in a regulatory filing.

The company uses air-to-ground cell towers to connect its WiFi to the airplanes.

The company’s ticker symbol is GOGO, with Morgan Stanley, Chase and UBS as co-lead underwriters.

In 2012, Gogo’s revenues rose 46 percent to $233.5 million from 2011.