Two Avianca Douglas DC-3 airliners collide over Colombia, killing 38.

Avianca S.A. is the largest airline in Colombia. It has been the flag carrier of Colombia since December 5, 1919, when it was initially registered under the name SCADTA. It is headquartered in Colombia, with its registered office in Barranquilla and its global headquarters in Bogotá and main hub at El Dorado International Airport. Avianca is the flagship of a group of airlines of the Americas, which operates as one airline using a codesharing system. Avianca is the largest airline in Colombia and second largest in South America, after LATAM of Chile. Avianca and its subsidiaries have the most extensive network of destinations in the Americas. Before the merger with TACA in 2010, it was wholly owned by Synergy Group, a South American holding company established by Germán Efromovich and specializing in air transport. It is listed on the Colombia Stock Exchange.

The Douglas DC-3 is a propeller-driven airliner manufactured by the Douglas Aircraft Company, which had a lasting effect on the airline industry in the 1930s to 1940s and World War II. It was developed as a larger, improved 14-bed sleeper version of the Douglas DC-2. It is a low-wing metal monoplane with conventional landing gear, powered by two radial piston engines of 1,000–1,200 hp (750–890 kW). Although the DC-3s originally built for civil service had the Wright R-1820 Cyclone, later civilian DC-3s used the Pratt & Whitney R-1830 Twin Wasp engine. The DC-3 has a cruising speed of 207 mph (333 km/h), a capacity of 21 to 32 passengers or 6,000 lbs (2,700 kg) of cargo, and a range of 1,500 mi (2,400 km), and can operate from short runways.

On 29 July 1972, Avianca Flight 630, operating a scheduled domestic passenger flight within Colombia, flying from La Vanguardia Airport to Los Colonizadores Airport, with stopovers at Paz de Ariporo Airport and Santiago Pérez Quiroz Airport, collided with another Avianca flight, operating as Flight 626, also operating a scheduled domestic passenger flight within Colombia from La Vanguardia Airport to Las Gaviotas Airport, with stopovers in 3 different cities. The resulting mid-air collision killed all 21 occupants on board Flight 630 and all 17 occupants on board Flight 626, resulting in 38 total fatalities.