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The company was established on 24 August 1994 by the El-Hage family and started services with a single Let 410 aircraft. Early services were largely between Brazzaville and Pointe Noire. In December 1994 an Antonov An-24 joined the fleet, followed in 1996 by a Boeing 727-200 and Yakovlev Yak-42. Late 1997 saw the airline having to move temporarily to Johannesburg in South Africa to avoid a civil war.

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Trans Air Congo operates services to the following destinations:

• Domestic scheduled destinations: Brazzaville and Pointe Noire.
• International scheduled destinations: Cotonou, Douala, Libreville, and Abidjan

As of August 2025^[update], Trans Air Congo operates the following aircraft:^[2]

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The airline previously operated the following aircraft:

• 1 Boeing 727-200
• 5 Boeing 737-200
• 3 Boeing 737-300^[3]
• 2 Boeing 737-500
• 1 McDonnell Douglas MD-82
• 2 Embraer EMB 120 Brasilia
• 1 Let L-410 Turbolet
• 1 Antonov An-24
• 1 Yakovlev Yak-42

Trans Air Congo has been delivered the IOSA certificate until 2015.^[4]

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MilesPlus is the frequent flyer program developed by TAC. Registration is free and open to every passengers. First company in Congo to develop a fidelity program, MilesPlus has proved to be a successful tool as the program enrolled more than 2200 members since its creation in 2012. MilesPlus offers 4 different cards (Blue, Silver, Gold and Platinum).

• On 21 March 2011, a transport Antonov An-12 on a flight from Brazzaville Maya-Maya Airport to Pointe-Noire Antonio Agostinho Neto International Airport, registered TN-AGK, carrying a crew of 4, crashed into the Mvou-Mvou residential area in Pointe-Noire, Republic of the Congo.^[5] According to sources with the Congo National Agency of Civil Aviation, the aircraft had been cleared to land, and was on a 3-mile final approach when it crashed. The Russian Embassy in Congo reported that the 3 Russian and 1 Kazakhstani crewmembers were killed in the crash. Local medical services report that 23 bodies were recovered from the crash site, along with 15 injured people.^[6][7]