Sit on the Left side of the plane for the best views on flights from Toronto to Cozumel. The left side wins overall because the Toronto departure view — CN Tower, Lake Ontario, the city waterfront — is genuinely spectacular and hard to beat. The left side also tracks closer to the Gulf of Mexico coastline during cruise, offering occasional glimpses of the Yucatan Peninsula's northern coast on descent. The Cozumel landing view is better on the right, but the departure experience tips the balance left.

During takeoff from Lester B Pearson International (YYZ), sit on the Left side for the best views. YYZ departures on runway 23 (the most common westerly departure) swing south, putting Lake Ontario and the Toronto downtown skyline on the left side. You get a clear view of the CN Tower, the waterfront, and the lake stretching east toward Hamilton Bay. Notable sights include: CN Tower and downtown Toronto skyline, Lake Ontario shoreline, Hamilton Harbour to the southwest, Niagara Escarpment ridge visible to the west.

When landing at Cozumel International (CZM), sit on the Right side for the best views. Cozumel's runway 06/24 means approaches typically come in from the west over the Yucatan Channel. Landing on runway 06 (heading east), the right side faces north toward the open Caribbean and the island's western reef edge, while the left side looks inland over scrubby jungle. On runway 24 (heading west), the right side gives you the turquoise shallow reef flats along the island's southwest shore. Notable sights include: Cozumel's western reef shelf and turquoise shallows, Yucatan Channel deep blue water, Palancar Reef area visible as lighter turquoise patches, the island's flat jungle interior.

The flight from Lester B Pearson International (YYZ) to Cozumel International (CZM) takes Approximately 4 hours 15 minutes to 4 hours 45 minutes.

The flight tracks southwest over Lake Erie's eastern basin, then crosses Ohio and Kentucky before entering Tennessee and Mississippi airspace. Over the Gulf of Mexico, the route passes well south of New Orleans and the Mississippi Delta. On descent, the northern Yucatan Peninsula becomes visible — flat scrubby jungle with the distinctive turquoise of the Caribbean coast appearing as you cross the coastline near Cancun before the short overwater leg to Cozumel.