The forward was forced to self-isolate following a coronavirus outbreak in the South Korea squad saw five players test positive.
Son returned a negative test and joined the 19-man squad to face Qatar in a friendly on Tuesday, in which Son assisted one goal in the 2-1 win.
Spurs were keen to get their player back to England as soon as possible and laid on a private jet for the forward who has 10 goals in 13 games this season.
Son on Tuesday afternoon posted a picture of himself at an airport, with the game in Austria finishing around 3pm GMT, ahead of taking a flight.
Spurs welcome City to N17 on Saturday evening, looking for a win which could again take them temporarily top of the Premier League table.