AirHint found the following cheapest return flights from Kaunas (KUN) to Bourgas (BOJ) in September 2025 (see full year).

Return flights

28 Sep - 16 Oct	Ryanair	direct
28 Sep - 05 Oct	Ryanair	direct
28 Sep - 12 Oct	Ryanair	direct
18 Sep - 05 Oct	Ryanair	direct
21 Sep - 05 Oct	Ryanair	direct
21 Sep - 25 Sep	Ryanair	direct
18 Sep - 25 Sep	Ryanair	direct
11 Sep - 05 Oct	Ryanair	direct
04 Sep - 07 Sep	Ryanair	direct
04 Sep - 18 Sep	Ryanair	direct
07 Sep - 25 Sep	Ryanair	direct
04 Sep - 21 Sep	Ryanair	direct
11 Sep - 25 Sep	Ryanair	direct
18 Sep - 28 Sep	Ryanair	direct
07 Sep - 18 Sep	Ryanair	direct
14 Sep - 25 Sep	Ryanair	direct

Also check the deals for one-way flights from Kaunas to Bourgas 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 Kaunas to Bourgas in September from 81€

Return flights