I saw these on a red eye the other night from LAX-PHL. Same deal as others have said, racetrack pattern lights in a NE direction. We first noticed them over Arizona, and they continued for quite a while, I would say until we were over the Midwest somewhere until we forgot about them.
Multiple objects in some sort of pattern, appearing extremely bright then slowly dimming before becoming bright again. They appeared to be at a high altitude, way higher than we were anyway. Initially we thought it was military traffic in a MOA. I don't think they were satellites either, at least nothing like the normal satellites you can see after dusk passing in orbit. Kinda spooky!