Also, Sheffield United are on the brink of joining them after a 2-0 victory over Ipswich Town.
Norwich needed just a point to be sure of a return to the English top flight after a three-year absence.
And goals from Marco Stiepermann and Mario Vrancic were enough to secure all three, sending Norwich back to the top of the standings.
Norwich are nine points clear of Leeds United — who have two games left to play — in third.
Sheffield United are six points clear of Leeds, after goals from Scott Hogan and Jack O’Connell helped them secure a third successive win.