AirHint found the following cheapest return flights from Porto (OPO) to Maastricht (MST) in September 2025 (see full year).

Return flights

24 Sep - 27 Sep	Ryanair	direct
27 Sep - 01 Oct	Ryanair	direct
17 Sep - 20 Sep	Ryanair	direct
10 Sep - 27 Sep	Ryanair	direct
10 Sep - 20 Sep	Ryanair	direct
24 Sep - 29 Sep	Ryanair
10 Sep - 13 Sep	Ryanair	direct
19 Sep - 20 Sep	Ryanair
20 Sep - 29 Sep	Ryanair
06 Sep - 10 Sep	Air Europa
06 Sep - 10 Sep	Ryanair	direct

Also check the deals for one-way flights from Porto to Maastricht 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 Porto to Maastricht in September from 105€

Return flights