|Founded||26 February 2020|
|Commenced operations||28 December 2020|
|Hubs||Shanghai Hongqiao International Airport|
|Parent company||China Eastern Airlines|
|Headquarters||Hongqiao Airport, Shanghai, China|
One Two Three Airlines (Chinese: 一二三航空公司; pinyin: Yī'èrsān Hángkōng Gōngsī) is an airline headquartered in Shanghai that was launched as a subsidiary of China Eastern Airlines in February 2020. The airline is focused on the Yangtze Delta region.
The name "One Two Three Airlines" refers to Chinese philosopher Laozi's three principles of Daoism.
On 26 February 2020, China Eastern Airlines launched OTT Airlines as a subsidiary to operate domestically produced aircraft in addition to its existing business jet operations.
In June 2020, OTT Airlines received the delivery of their first three COMAC ARJ21s. In December 2020, the Civil Aviation Administration of China (CAAC) announced that it had completed a preliminary review of the airline's application for an operating license.
The airline operated its maiden flight on 28 December 2020, a flight from Shanghai Hongqiao International Airport to Beijing Capital International Airport. It plans to open new routes to Nanchang, Hefei, and Wenzhou over the first three months of 2021.
OTT Airlines is a subsidiary of China Eastern Airlines. OTT Airlines is headquartered in Shanghai.
OTT Airlines mainly operates the Chinese-made Comac ARJ21. It began operations with three ARJ21s, with 6 additionals delivered in 2021 and a total of 35 ARJ21s scheduled to be delivered between 2021 and 2025.