Windsor, ON → Markham, ON

Your journey from Windsor to Markham covers approximately 279 miles and takes roughly four hours and forty-one minutes of driving time, making it an ideal day trip or morning commute across Ontario. The route primarily follows Highway 401 eastbound, one of North America's busiest and most important transportation corridors, which you'll pick up after navigating through Windsor's local streets. This major thoroughfare will carry you through the heart of Southern Ontario's Golden Horseshoe region, a densely populated and economically vital area that serves as the gateway between the Great Lakes and Canada's eastern provinces. As you merge onto the 401, prepare yourself for fairly consistent traffic, particularly through the greater Toronto Area, though the western stretches near London offer a more relaxed driving experience with lighter vehicle volumes.

The terrain along this route is notably flat to gently rolling, characteristic of the glacially-shaped landscape of southwestern and central Ontario. You'll pass through a mix of agricultural farmland, suburban sprawl, and increasingly dense urban development as you progress eastward toward the Greater Toronto Area. Notable cities you'll drive through or near include London, about an hour into your journey, followed by the increasingly populated areas around Guelph and Cambridge before the landscape transitions into the suburban communities that feed into Toronto proper.

The final stretch toward Markham sees the 401 navigate through some of the busiest urban highway segments in Canada, particularly as you approach the junction with Highway 404. While elevation changes are minimal throughout this drive, the shift from open countryside to urban congestion is quite dramatic and often marks the most challenging portion of your journey in terms of traffic density and navigation complexity. For the most pleasant driving experience, aim to travel during spring or early fall when road conditions are optimal and weather is most favorable, and avoid summer weekends and weekday rush hours when the 401 becomes particularly congested. Winter driving along this corridor requires extra caution due to potential snow and icy conditions, particularly in the transition zones east of London.

The 279-mile drive from Windsor, Ontario to Markham, Ontario takes approximately 4h 40m under normal conditions. Weather along this route can vary significantly, especially across varying terrain where weather conditions can change rapidly. Route Outlook helps you find the safest time to travel by showing you weather conditions at every point along your route, timed to when you'll actually be there.

Common Weather Hazards on This Route

• Winter storms and heavy snowfall (November through April)
• Black ice on mountain passes and bridges

Seasonal Driving Considerations

The Northeast corridor sees the full range of seasonal weather. Nor'easters from November through March can dump heavy snow and create whiteout conditions, while ice storms make roads treacherous. Summer and fall offer excellent driving conditions, though fall foliage season brings heavier traffic on scenic routes. Spring can bring unpredictable rain and residual freeze-thaw damage to road surfaces.

Best Time to Drive Windsor to Markham

For medium-distance drives like this 279-mile route, consider starting in the early morning to arrive before afternoon storms develop. Check the 7-day forecast above to find a day with favorable conditions along the entire route.

Driving Strategy

A 279-mile drive from Windsor to Markham takes a significant part of the day. Plan at least one fuel and rest stop along the way. If your route crosses elevation changes or state lines, expect weather conditions to shift mid-trip. Monitor the segment-by-segment forecast rather than just checking destination weather. Starting early in the morning typically avoids afternoon storm development and rush-hour congestion near urban areas.

Frequently Asked Questions