Ottawa, ON → Longueuil, QC

The drive from Ottawa to Longueuil covers approximately 138 miles and takes just over two hours, making it an ideal road trip for weekend getaways or business travel between Canada's capital and the Montérégie region. You'll primarily follow Highway 417 eastbound out of Ottawa before transitioning to Highway 20 toward Quebec, which eventually feeds into the Autoroute 20 as you cross the provincial border. This route is straightforward and well-maintained, designed to move traffic efficiently between these two important regional centers. The highways are clearly marked and relatively easy to navigate, even for drivers unfamiliar with the region.

As you leave Ottawa's urban landscape, you'll notice the terrain gradually transitions from the Canadian Shield's rocky outcroppings to gentler, more forested countryside typical of Eastern Ontario. The drive takes you through several small communities and past the scenic Rideau River valley before you approach the Quebec border. Once you cross into Quebec near Hawkesbury, the landscape opens up considerably, with expansive agricultural land and glimpses of the Ottawa River creating a pleasant visual backdrop. This shift from urban to rural to agricultural scenery keeps the drive interesting despite its relatively short duration.

The stretch through Quebec toward Longueuil follows the Autoroute 20's corridor along the St. Lawrence Lowlands, where you'll pass through or near the communities of Vaudreuil-Dorion and Salaberry-de-Valleyfield before descending toward the Montérégie. The approach to Longueuil involves navigating the busier perimeter routes around greater Montréal, so expect traffic congestion during rush hours and on weekends. Longueuil itself sits on the south shore of the St. Lawrence River, directly across from Montréal, making this drive an excellent gateway to exploring the broader Montréal metropolitan area.

For the most pleasant driving experience, plan your trip during late spring through early autumn when roads are clear and weather conditions are mild. Winter travel along this route requires caution due to snow and ice, particularly in Quebec, while late autumn and early spring can present unpredictable conditions. Fall is especially rewarding for this journey, as the Eastern Ontario and Western Quebec forests display stunning foliage colors that make the drive genuinely scenic.

The 138-mile drive from Ottawa, Ontario to Longueuil, Quebec takes approximately 2h 18m 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 Ottawa to Longueuil

For shorter trips like this 138-mile drive, morning departures typically offer the best conditions with lighter traffic and better visibility. Avoid rush hour periods (7-9 AM and 4-7 PM) if possible.

Driving Strategy

At 138 miles, the Ottawa to Longueuil drive is short enough to complete in a single stretch. Still, check conditions along the route before you leave — a quick glance at live traffic cameras can confirm road visibility and surface conditions. If bad weather is forecasted for a narrow window, adjusting your departure by even an hour can make a significant difference in safety.

Frequently Asked Questions