Taking remote-operated DX to its limit of absurdity, I suppose you could relay through a drone that's towing an antenna at 35000 feet, just inside the 200-mile limit at the point in the US that's closest to the DX. If you've got the megabucks for that sort of thing.
Wouldn't count. Aeronautical mobile is not valid for DXCC (nor is maritime mobile). Operations must be on terra-firma.