We heard last summer that 2010 would be the year for US Airways to gain in-flight internet, and sure enough, America’s worst legacy airline has made good on said promise. As of now, a grand total of five Airbus A321 planes are equipped with Gogo , and if you’re lucky enough to end up on one, you’ll get a single free session through June 1st provided that you’re a first-time Gogo user. Speaking of early June, that’s when all 51 of the outfit’s A321′s will be lit with WiFi, and better still, you’ll be able to see right away if your flight will be wired (or unwired, as it were) at the time of booking. There’s no mention of expansion plans beyond that, and we still haven’t received an apology for refusing us a gratis glass of water on a 6.5 hour flight in August of 2008.

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US Airways finally secures Gogo in-flight WiFi, adding to all A321′s by June