AirHint found the following cheapest return flights from Nairobi (NBO) to Bujumbura (BJM) in September 2025 (see full year).

Return flights

02 Sep - 05 Sep	Air Tanzania
15 Sep - 21 Sep	Uganda Airlines
04 Sep - 06 Sep	RwandAir
02 Sep - 06 Sep	Air Tanzania
23 Sep - 25 Sep	Ethiopian Airlines
03 Sep - 05 Sep	Skyward Express
23 Sep - 25 Sep	Kenya Airways	direct
15 Sep - 21 Sep	Kenya Airways	direct
02 Sep - 05 Sep	Kenya Airways	direct
03 Sep - 06 Sep	RwandAir

Also check the deals for one-way flights from Nairobi to Bujumbura in September.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Nairobi to Bujumbura in September from $494

Return flights