Yes he could have but just barely and with luck.
They said he had fuel for 7.5 to 8 hours at 520mph — 3900 to 4160 miles.
The path that he flew would have been 4230 miles — out of reach but it could still have been a target destination and may be in the waters a couple hundred miles short of it — if that is the island on his computer.
He’d have to hope that the winds were in his favor.