Plane Crashes in Montreal: A Historical Overview with Key Data

Montreal, a bustling hub of culture and commerce, has unfortunately witnessed its share of aviation tragedies. From the early days of commercial flight to more recent incidents, plane crashes in and around the city have left lasting impacts on the community and the aviation industry. Below is a detailed look at some of the most significant plane crashes in Montreal’s history, complete with locations, casualty figures, and critical data to paint a clear picture of these events. Buckle up—this is a sobering journey through the skies above our city.

A Sobering Legacy: Montreal’s Aviation Incidents

Aviation accidents, by their nature, are high-stakes events that demand rigorous investigation and often lead to sweeping safety improvements. Montreal, home to major airports like Montréal–Pierre Elliott Trudeau International (formerly Dorval) and Mirabel, has seen a range of incidents, from catastrophic commercial crashes to smaller private plane mishaps. These events, while rare, highlight the complexities of flight in a region known for challenging weather and busy air traffic. Let’s dive into the data and stories behind some of the most notable crashes, focusing on locations, casualties, and contributing factors.

Key Plane Crashes in Montreal’s History

Trans-Canada Air Lines Flight 831 (1963)

• Date: November 29, 1963
• Location: Near Ste-Thérèse-de-Blainville, Quebec, ~32 km (20 mi) north of Montreal
• Aircraft: Douglas DC-8 54CF, registered CF-TJN
• Casualties: 118 fatalities (111 passengers, 7 crew)
• Details: This flight, en route from Montréal–Dorval to Toronto, crashed just five minutes after takeoff in poor weather. The wreckage was found in a flat field halfway between Highway 11 (now Quebec Route 117) and the Laurentian Autoroute (Quebec Highway 15). Heavy rain and deep mud complicated rescue efforts, and a fuel-fed fire burned for hours. The investigation pointed to a possible issue with the jet’s pitch trim system, though the exact cause remained undetermined due to the absence of cockpit voice or flight data recorders, which weren’t required in Canada at the time. Of the victims, 76 were from the Toronto area, and three were foreign nationals (two Americans, one Indian). A memorial garden now stands near the crash site at Cimetière de Sainte-Thérèse.

Air Canada Flight 621 (1970)

• Date: July 5, 1970
• Location: Castlemore, Ontario, ~10 km (6.2 mi) north of Toronto Pearson International Airport (flight originated in Montreal)
• Aircraft: Douglas DC-8
• Casualties: 109 fatalities (100 passengers, 9 crew)
• Details: Departing from Montréal–Dorval at 7:17 a.m., this flight was bound for Los Angeles with a stop in Toronto. During landing at Toronto Pearson, the right wing struck the ground, causing the plane to climb to 3,000 feet before the engines exploded. The right wing detached, and the plane crashed in a farm field. While the crash occurred in Ontario, its Montreal origin makes it significant for the city’s aviation history. All aboard perished, and the incident underscored the risks of landing mishaps during complex descent phases.

Propair Flight 420 (1998)

• Date: June 18, 1998
• Location: Montréal–Mirabel International Airport, Mirabel, Quebec
• Aircraft: Fairchild Metroliner SA226
• Casualties: 11 fatalities (9 passengers, 2 crew)
• Details: This charter flight from Montréal–Dorval to Peterborough, Ontario, suffered an in-flight fire shortly after takeoff due to overheated brakes in the left wheel-well. The crew diverted to Mirabel, but the fire destroyed warning systems and compromised the left wing’s structural integrity. On final approach, the wing failed, causing the plane to roll 90 degrees and crash on Runway 24. All aboard, including General Electric engineers commuting to Lachine, Quebec, were killed. The investigation highlighted the dangers of undetected mechanical issues and the need for better fire detection systems.

Cessna 172M Banner Towing Crash (2021)

• Date: October 2, 2021
• Location: Parc Dieppe, near Île Sainte-Hélène, Montreal
• Aircraft: Cessna 172M
• Casualties: 1 fatality (passenger), 1 injured (pilot)
• Details: Operated by Publicité AERO-GRAMME Inc., this small plane was towing a proposal banner over the St. Lawrence River near the Concorde Bridge when it experienced engine trouble, likely due to carburetor icing from unfavorable weather. The pilot attempted an emergency landing but grazed treetops, causing the plane to cartwheel and crash in a forested area near Habitat 67. The passenger died, and the pilot was hospitalized with unknown injuries. The crash occurred during the Osheaga Get Together festival, but the event was unaffected. The banner was lost in the St. Lawrence River.

Small Plane Crash in Saint-Bruno-de-Montarville (2025)

• Date: February 20, 2025
• Location: Saint-Bruno-de-Montarville, Quebec, between Highway 30 and Rang des vingt-cinqs
• Aircraft: Cessna-type small plane
• Casualties: No reported injuries
• Details: This recent incident involved a small plane crashing in a field on Montreal’s South Shore. Longueuil police reported no initial injuries, and the crash occurred in a largely industrial area, though near a residential neighborhood. Details remain sparse, but the incident highlights the risks of small aircraft operations near urban centers.

Crash Data at a Glance

Here’s a summary of the key crashes, focusing on the hard numbers:

Date	Location	Aircraft	Fatalities	Injuries	Cause (Suspected/Confirmed)
Nov 29, 1963	Ste-Thérèse-de-Blainville, QC	Douglas DC-8	118	0	Possible pitch trim failure
Jul 5, 197hangout	Castlemore, ON (from Montreal)	Douglas DC-8	109	0	Wing strike during landing
Jun 18, 1998	Mirabel, QC	Fairchild Metroliner	11	0	In-flight fire, brake overheat
Oct 2, 2021	Île Sainte-Hélène, Montreal	Cessna 172M	1	1	Carburetor icing, engine failure
Feb 20, 2025	Saint-Bruno-de-Montarville, QC	Cessna-type	0	0	Under investigation

What Makes These Crashes Significant?

These incidents, spanning over six decades, reveal the evolving challenges of aviation safety. The 1963 Trans-Canada Air Lines crash was Canada’s deadliest at the time, pushing for advancements like mandatory flight recorders, which weren’t standard then. The 1970 Air Canada crash highlighted landing phase risks, a critical phase where nearly half of crashes occur (1983–2019 data shows 49% of crashes happen during takeoff or landing). The 1998 Propair crash exposed vulnerabilities in fire detection systems, leading to improved standards for charter aircraft. The 2021 Cessna crash underscored weather-related risks for small planes, with carburetor icing a recurring issue in Quebec’s variable climate. The 2025 Saint-Bruno crash, while non-fatal, reminds us that even smaller incidents near urban areas raise safety concerns.

Montreal’s crashes have often driven change. The 1963 incident influenced Canada’s adoption of flight data recorders, now standard for commercial jets. The Propair crash led to stricter maintenance checks for brake systems. Yet, challenges persist—Montreal’s weather, with its fog, snow, and icing conditions, remains a factor, as seen in the 2021 crash. Urban proximity also complicates emergency responses, as traffic delayed rescuers in 1963.

Stories Behind the Numbers

Each crash carries human stories. In 1963, two CBC employees were among the victims, preparing a bilingual TV show, a reminder of Montreal’s cultural role. The 1998 Propair flight carried engineers who were regular commuters, their loss felt deeply in Lachine’s tight-knit General Electric community. The 2021 banner-towing crash, meant to celebrate a joyful moment, ended in tragedy near the festive buzz of Osheaga, highlighting the unpredictability of aviation. These stories remind us that behind every statistic are lives and legacies.

Recent Trends and Safety Insights

In 2023, Canada reported 182 air transportation accidents, up 10% from 2022 but 17% below the 2013–2022 average of 220. Most (72%) involved fixed-wing planes, with 9% involving ultralights. Montreal’s recent incidents, like the 2021 and 2025 crashes, often involve smaller aircraft, reflecting the growing popularity of private aviation. Despite these events, aviation remains one of the safest travel modes, with a 95% survival rate in U.S. crashes from 1983–2000. Design improvements, like the Bombardier CRJ-900’s breakaway wings in a 2025 Toronto crash (though not in Montreal, it was Montreal-designed), show how engineering saves lives.

How to Stay Informed

For the latest on aviation incidents, check the Transportation Safety Board of Canada (tsb.gc.ca) for official reports or Montreal Gazette (montrealgazette.com) for local coverage. If you’re near crash sites like Ste-Thérèse or Mirabel, respect memorial areas and stay updated via CBC News (cbc.ca) for real-time updates. Aviation safety is a shared responsibility—knowing the data and stories behind these events helps us appreciate the skies we soar through.

Montreal’s aviation history is a mix of tragedy and resilience. From the 118 lives lost in 1963 to the miraculous no-injury crash of 2025, these events shape how we fly safer today. Next time you’re at Trudeau Airport, take a moment to reflect on the lessons learned from these skies.