The Prime Minister’s partner Carrie Symonds, 32, shared snaps of the family enjoying walks in the Scottish Highlands.
In the photos, Mr Johnson is seen smiling while carrying his son Wilfred in a baby sling.
A snapshot shows the family posing together as Ms Symonds holds their dog Dilyn.
The trio are reportedly staying in a secluded three-bedroom house on the northwest coast.
A government source confirmed to the PA news agency that the Prime Minister has now returned from Scotland.
Mr Johnson was due in Westminster next week after being criticized for not returning during the A-level outcome chaos.