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

Return flights

26 Sep - 29 Sep	Ryanair
24 Sep - 30 Sep	Ryanair
26 Sep - 30 Sep	Ryanair
26 Sep - 08 Oct	Ryanair
20 Sep - 29 Sep	Ryanair
16 Sep - 23 Sep	Ryanair
17 Sep - 01 Oct	Ryanair
26 Sep - 01 Oct	Ryanair
25 Sep - 07 Oct	Ryanair
19 Sep - 30 Sep	Ryanair
25 Sep - 27 Sep	Ryanair
06 Sep - 09 Sep	Ryanair
25 Sep - 29 Sep	Ryanair
18 Sep - 22 Sep	Norwegian Air Sweden AOC
28 Sep - 06 Oct	Ryanair
26 Sep - 02 Oct	Ryanair
27 Sep - 05 Oct	Ryanair
18 Sep - 02 Oct	Norwegian Air Sweden AOC
18 Sep - 02 Oct	airBaltic	direct
25 Sep - 07 Oct	airBaltic	direct

Also check the deals for one-way flights from Madrid to Riga 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 Riga in September from $166

Return flights