After previously pairing up with HBO’s “Entourage” to launch a new route to Las Vegas, Virgin America has booked FX’s “It’s Sunny in Philadelphia” to promote its new flight to Philly.

The San Francisco-based airline started selling tickets to Philadelphia Intl Airport Tuesday after introducing its next route on its Facebook page with the help of “Sunny’s” mysterious “Green Man,” who appeared in a video on the social network.

“Green Man” is a mascot invented by Charlie Kelly, played by Charlie Day, in the show is made up of a green Lycra outfit.

The airline and FX are giving away a chance to win roundtrip flights and what they’re calling “the ultimate ‘It’s Always Sunny in Philadelphia’ fan pack” consisting of the first six seasons of the show on DVD, a Paddy’s Pub T-shirt, the series’ official board game and a guide to the characters’ favorite haunts.

The promo should help hype “Sunny’s” eighth season that kicks off this fall the way Virgin also promoted DreamWorks’ “Real Steel” last fall, through a tie-in and promotional partnership with Disney, which distributed the film through its Touchstone banner.

The carrier likes to tout its entertainment options, with its Red in-flight entertainment system offering 35 films, live TV, videogames, musicvids, and a 3,000 song library. Virgin Produced also uses the airline to promote its slate of pics, including “Immortals.”

Virgin America will fly three daily non-stop flights from Los Angeles Intl Airport to Philadelphia starting April 4, and two from San Francisco Intl Airport on April 10.

The airline, which recently started flying to Palm Springs, Chicago and Mexico’s Puerto Vallarta and Cancun, is launching Philadelphia as 50% of travelers flying from Philadelphia to L.A. use connecting flights (it’s 45% to San Francisco).