It's potentially the company's largest 7 37 max order since the aircraft safety ban was lifted.

If confirmed, the deal would provide much needed support after the plane was grounded for nearly two years following back to back fatal crashes.

The exact terms and timing of a possible announcement were not clear.

The proposed deal follows speculation of a face off between the smallest member of Boeing's Max family, the 7 37 max seven and the A to 20 planes from Airbus.

Southwest chief executive Gary Kelly had said in November that they were debating between the still uncertified Boeing 7 37 max seven and the A to 20 which would be the airlines first shift away from an all Boeing fleet.

Southwest said it does not comment on fleet decisions and has nothing to announce, but Kelly said at an event Wednesday that Southwest negotiations with Boeing are ongoing.