Police in Barnsley believed missing 63-year-old man Brendon Ashburn could have been in the Northampton or Milton Keynes area.
A search was launched to find Mr Ashburn in the area with officers saying they were concerned for his welfare.
He had not been seen since Sunday.
Thames Valley Police have now confirmed Mr Ashburn has been found safe and well in Milton Keynes.
A spokesman said they wanted to thank the public for their assistance.