East African Safari Air Express Ltd trading as Fly-SAX is a Kenyan airline based at Wilson Airport in Nairobi. Originally East African Safari Air, the airline was rebranded as Fly-SAX after its purchase by the parent company of Kenyan airline Fly540, and it now claims to be Kenya’s premier safari and private charter airline.

Before its current iteration, the airline began operations as East African Safari Air Limited, founded by Anthony A. Kegode and incorporated in May 1989. The company later changed the name of its airline operations to East African Safari Air Express.

In September 2004, East African Safari Air Express was placed into receivership. At that time, the airline was transporting an estimated 25,000 passengers per month on their various routes. East African Safari Air Express emerged from receivership and operated scheduled regional and domestic services with a fleet of McDonnell-Douglas DC-9s and a Fokker F28 that once belonged to competing Kenyan airline JetLink Express.

In November 2010, the airline was grounded in a dispute over payment of airline leases. In December 2010, low-cost carrier Fly540 purchased the assets of East African Safari Air Express, and the operation was re-branded as Fly-SAX (an ode to its former Safari Air Express moniker) in September 2012. The airline carried over the same IATA (B5) and ICAO (EXZ) airline codes to the new brand.

In April 2013, Fly540 signed an acquisition agreement with Tanzanian airline Fastjet that would see Fastjet assume Fly540's operations in order to establish Fastjet service in Kenya. This purchase leaves it unclear whether or not Fly-SAX will continue as a separate entity, as Fastjet staff have indicated that the Fly540 brand will eventually be phased out.

As of January 2016, Fly-SAX flies to the following destinations:

The Fly-SAX fleet consists of the following aircraft (as of August 2016):

The airline previously operated the following aircraft (as of June 2015):

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