Is there a train to Longueuil?

Yes, the REM and Metro connect Longueuil to Montreal.

Yes, it is a major, well-monitored highway tunnel.

Bus travel is possible but involves multiple transfers in Montreal.

Is it a scenic route?

The drive through the Laurentides is very scenic.

Larouche

Longueuil

Driving

Larouche to Longueuil

Updated: 30 May 2026

The journey from Larouche to Longueuil covers approximately 440 kilometers. You will travel south on QC-175 S, merge onto Autoroute 40 W, and cross into the South Shore of Montreal via the Louis-Hippolyte-La Fontaine Bridge-Tunnel. This route typically takes 5 hours depending on traffic. It is a major transit path connecting the Saguenay region to the South Shore of Montreal.

Total Distance: 440 km driving distance; 330 km straight-line air distance.

Fastest Way

Driving via the A-40 and A-25 is the fastest route, taking 5 hours.

Cheapest Way

Driving your own vehicle is the most practical and cost-effective method.

Compare Larouche to Longueuil Routes

Driving

Direct

Duration

5 hours

Avg Price

75-95 CAD in fuel

Operator

Personal Vehicle

Route

QC-175 S to A-40 W to A-25 S.

The La Fontaine Tunnel often has construction; check 511 Quebec before departing.

Travel Tips

Tunnel Traffic
The La Fontaine Tunnel is a major bottleneck; plan your arrival outside rush hours.
Navigation
Use GPS to find the best bridge or tunnel crossing into Longueuil.
Parking
Longueuil has several metro-connected parking lots.
Rest Stops
Stop in Drummondville for a break on the A-20.
Weather
Be prepared for changing weather conditions along the St. Lawrence River.

Safety Tips

Tunnel Safety
Maintain a safe distance in the tunnel and keep your headlights on.
Construction
Follow all signage in construction zones near the tunnel.
Emergency
Keep your phone charged and have a roadside assistance plan.
Visibility
Ensure your lights are working properly for tunnel driving.