AirHint found the following cheapest return flights from Madrid (MAD) to Iasi (IAS) in September 2025 (see full year).

Return flights

10 Sep - 17 Sep	Wizz Air Malta
11 Sep - 18 Sep	Wizz Air Malta
11 Sep - 17 Sep	Wizz Air Malta
08 Sep - 12 Sep	Ryanair
12 Sep - 15 Sep	Ryanair
03 Sep - 10 Sep	Wizz Air Malta
26 Sep - 29 Sep	Iberia
12 Sep - 19 Sep	Ryanair
03 Sep - 09 Sep	Ryanair
11 Sep - 14 Sep	Wizz Air Malta
26 Sep - 17 Oct	Wizz Air Malta	direct
29 Sep - 17 Oct	Wizz Air Malta	direct
26 Sep - 13 Oct	Wizz Air Malta	direct
29 Sep - 13 Oct	Wizz Air Malta	direct
29 Sep - 20 Oct	Wizz Air Malta	direct
22 Sep - 13 Oct	Wizz Air Malta	direct

Also check the deals for one-way flights from Madrid to Iasi 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 Madrid to Iasi in September from $148

Return flights