A UFO investigator looking for evidence of flying saucers inadvertently stumbled across the suspected aircraft in an eight-month-old Google satellite image.
If Scott C Waring is correct, the plane had travelled to the Cape of Good Hope, off Cape Town, South Africa.
Mr Waring, who is editor of UFO Sightings Daily, posted details of his discovery online.
If he has discovered the aircraft, it would appear the plane has survived the mystery crash largely in one piece.
The Boeing 777 disappeared on with 239 people on board en route from Kuala Lumpur to Beijing on March 8, 2014.
The site of the debris find is about 1,200 miles from Cape Town.
Mr Waring blogged: “I was looking around the Cape of Good Hope for an old UFO sighting I found three years ago, and was hoping to make an update when I came across a shadow in the water, which resembled an airliner.
“I used to work on B-1 bombers back at Ellsworth SD, at an SAC during my USAF days. I know a plane when I see one.”
Mr Waring speculated a Boeing 777-200 like MH370 would have enough fuel to fly between 6,000 miles and 7,700 miles and the “crash site” was about 5,400 from where it took off from.
He added: “The Google earth photo is dated July 26 2015 and it crashed on March 8 2014. It’s had 16 months of moving about.”
He now fears it could have moved since the picture was taken last July.
He said action was needed urgently to confirm or rule out his findings.
He said: “I know there is less than one per cent of one per cent of a chance that this is MH370, but it’s better than we had five minutes ago right.
“I feel awful for those families who lost friends and family this plane and I hope this might get them some closure.”
Mr Waring has a knack for spotting well-know objects in satellite and other NASA images taken in space.
He regularly posts alleged sightings in images talked by the NASA Curiosity Rover droid that he says prove aliens exist such as beings, buildings, UFOs, ancient ruins, animals, fossils, the list goes on.
But most scientists agree he is simply falling victim to a phenomena known as pareidolia, when the brain tricks they were into seeing familiar objects like faces or animal shapes in textures or patterns like a rock surface.
To try and prove the theory, Mr Waring has tweeted Malaysia Airlines to alert them to the discovery and is awaiting a response.