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Established 100 years ago in 1923, Czech Airlines is one of the five oldest airlines in the world. The airline commenced operations in October of 1923. In the 1970s, the airline’s livery featured the letters OK on its tail as is Czech Airlines two letter IATA designation is OK. Additionally, the beginning of each aircraft registered with the Czech Republic begins with OK. The airline currently operates service to three destinations with two Airbus A320-200s. This image was posted on October 06, 2023.