AirHint found the following cheapest return flights from Helsinki (HEL) to Budapest (BUD) in September 2025 (see full year).

Return flights

01 Sep - 10 Sep	Norwegian Air Sweden AOC
15 Sep - 17 Sep	Norwegian Air Sweden AOC
17 Sep - 19 Sep	Norwegian Air Sweden AOC
17 Sep - 24 Sep	Norwegian Air Sweden AOC
01 Sep - 07 Sep	Norwegian Air Sweden AOC
01 Sep - 05 Sep	Norwegian Air Sweden AOC
04 Sep - 08 Sep	Ryanair
14 Sep - 18 Sep	Finnair
14 Sep - 18 Sep	Finnair	direct
14 Sep - 19 Sep	Finnair

Also check the deals for one-way flights from Helsinki to Budapest 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 Helsinki to Budapest in September from $173

Return flights