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Crime & Justice • Aviation Accident

Tenerife Airport Disaster

The Tenerife Airport Disaster was a runway collision between two Boeing 747 passenger aircraft at Los Rodeos Airport in Tenerife, Canary Islands, on 27 March 1977.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 26, 2026|2 min read| Fact-checked

The Tenerife Airport Disaster was a runway collision between two Boeing 747 passenger aircraft at Los Rodeos Airport in Tenerife, Canary Islands, on 27 March 1977. It killed 583 people and remains the deadliest aviation accident in history. Investigators concluded that the KLM aircraft began its takeoff without clearance, with dense fog and radio miscommunication contributing to the crash.

Background

The accident happened at Los Rodeos Airport in Tenerife, where two large passenger aircraft were operating under poor visibility conditions. The airport and air traffic situation created a high-risk environment for runway operations.

The collision

KLM Flight 4805 began its takeoff roll and collided with Pan Am Flight 1736, which was still on the runway. The impact and ensuing fire destroyed both aircraft.

Investigation and cause

Spanish investigators concluded that the fundamental cause was the KLM captain’s takeoff without clearance. Dense fog, radio miscommunication, and runway congestion were also contributing factors.

Casualties and significance

A total of 583 people were killed, with 61 survivors from the Pan Am aircraft. The disaster remains the deadliest aviation accident in history and is often cited in discussions of aviation safety.

Key facts

  • The collision involved two Boeing 747s on the same runway.
  • The accident occurred in dense fog, reducing visibility.
  • All 248 people aboard the KLM aircraft were killed.
  • 335 of the 396 people aboard the Pan Am aircraft died.
  • The disaster is widely regarded as the deadliest aviation accident in history.

Frequently asked questions

When did the Tenerife Airport Disaster happen?
It happened on 27 March 1977.
Where did the disaster occur?
It occurred at Los Rodeos Airport, now Tenerife North Airport, in Tenerife, Canary Islands, Spain.
How many people died?
A total of 583 people were killed.
Which flights were involved?
KLM Flight 4805 and Pan Am Flight 1736 were involved.
What was the main cause?
Investigators concluded that the KLM aircraft took off without clearance, with fog and communication problems contributing.
Is it the deadliest aviation accident?
Yes. It is widely described as the deadliest aviation accident in history.

References

  1. Wikipediahttps://en.wikipedia.org/wiki/Tenerife_airport_disaster
    Supports: Date, aircraft involved, casualties, runway collision description, and investigation summary.
  2. Encyclopaedia Britannicahttps://www.britannica.com/event/Tenerife-airport-disaster
    Supports: Date, location, casualty total, and historical significance as the deadliest aviation accident.
  3. Federal Aviation Administrationhttps://www.faa.gov/sites/faa.gov/files/2022-11/Spanish_Findings_0.pdf
    Supports: Spanish investigation finding that the KLM captain took off without clearance.
  4. SKYbraryhttps://skybrary.aero/accidents-and-incidents/b742-b741-tenerife-canary-islands-spain-1977
    Supports: Accident summary, weather/visibility conditions, casualty figures, and investigative cause.