Not likely you'd ever get out. The airspeed of a commercial jet is so fast you'd never get the door open, not even with multiple people helping. All the doors I've seen open outward and toward the relative wind which makes them virtually impossible to open in flight. You might be able to get one of the emergency doors over the wings open, but the hole would probably be too small to get through with a rig on. Plus if the plane was in a spin, shit would be flying everywhere and you'd be lucky if you could even get the overhead bin open let alone take it out of your luggage, put it on, get to the door, open the door, jump, ect. Then of course there are issues with altitude. If you got out at 20k or below, fine. But if you got out at 36,000', you could pass out quickly without supplemental O2 and your hands would freeze likely rendering complete loss of feeling. You'd have to be selective of the door too. If you chose one of the forward doors, your exit path could put you straight into the wing or one of the engines. Any one of these things would be an issue. All of them combined make it ultra unlikely you'd pull it off.
Even skydivers in jump planes sitting right next to a door intended to be easily opened with their rig on have had issues getting out during emergencies.