Toronto

Sheraton Gateway is attached to Terminal 3 via a walkway — no shuttle needed if you land there.

St. Lawrence Market is a bit far from the airport hotels, but if you're downtown, the peameal bacon sandwich at Carousel is worth it.

Balzac's Coffee in the Distillery District is a nice quiet spot if you're staying downtown instead of airport-side.

Airport hotel gym is 24hr and rarely busy overnight — good option for a short layover workout.