Steven Slater, the folk hero flight attendant who went on a tarmac tirade, got hitched -- to a woman -- in Las Vegas as a teenager, RadarOnline.com has exclusively learned.

But the marriage hit turbulence after just eight months!

Yet, according to court documents, it took the mad-as-hell gay flight attendant's ‘wife’ until 2006 -- 15 years after she said ‘I Do’ -- to file papers to have their union annulled.