Cambodia Angkor Air (Khmer: កម្ពុជា អង្គរ អ៊ែរ) is the national flag carrier airline of Cambodia, with its corporate headquarters and main hub in Phnom Penh. It commenced operations on the 28 of July 2009. The airline was established as a joint venture by the Cambodian government (51%) and Vietnam Airlines (49%), the latter allowing for codeshare flights. All of its fleet and most of its staff are leased from Vietnam Airlines.

Cambodia Angkor Air is a full service airline founded in July 2009, by both the Cambodian Government and Vietnam Airlines with an initial capital of $100 million. It offers both Business and Economy class on-board its Airbus A321, whilst only economy class is available on-board its ATR 72. It replaced national airline Royal Air Cambodge, which ceased operations in 2001, and concentrates on serving tourist routes within Asia, most notably catering for visitors of Angkor Wat in Siem Reap.

Since its launch, Cambodia Angkor Air has largely enjoyed a monopoly in the Cambodian aviation market. However Cambodia's domestic aviation sector is expected to become more competitive with the recent entry of three Cambodian privately owned airlines. One of the airlines named Cambodia Bayon Airlines is backed by Joy Air, a company owned by China's China Eastern Airlines. The second carrier named Bassaka Air. The third, Sky Angkor Airlines, a joint venture by Korean and Cambodian investor has its focus on the Korean market.

2009 July 28, Cambodia Angkor Air launched with flights with its ATR 72 on the following routes; Phnom Penh – Siem Reap, Phnom Penh – Ho Chi Minh and Siem Reap – Ho Chi Minh. Cambodia Angkor Air started codesharing with Vietnam Airlines and uses "VN" in place of its airline code "K6" with codeshare flight number on Vietnam routes.

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