I did a COMA the last time they offer them. Friggin awesome is all I can say. I did two weeks on two weeks off for 3 months. You keep your flight benefits and you pay half the months medical benefits. Or a prorated amount depending on how long your off. Not sure about sick time. Actually it's also prorated from what I remember. If you take the whole month off you get nothing. It's basically a LOA where you get to keep your flight benefits. And yes the company has to offer it. You can't just request it.