AirHint found the following cheapest return flights from Brussels (BRU) to Lisbon (LIS) in September 2026 (see full year).

Return flights

13 Sep - 22 Sep	Ryanair
13 Sep - 21 Sep	Ryanair
12 Sep - 22 Sep	Ryanair
29 Sep - 10 Oct	Ryanair
18 Sep - 22 Sep	Vueling Airlines
29 Sep - 03 Oct	Ryanair	direct
01 Sep - 22 Sep	Ryanair
02 Sep - 22 Sep	Ryanair
13 Sep - 03 Oct	Ryanair	direct
12 Sep - 21 Sep	Ryanair
01 Sep - 21 Sep	Ryanair
01 Sep - 03 Sep	Ryanair	direct
18 Sep - 21 Sep	Vueling Airlines
12 Sep - 03 Oct	Ryanair	direct
29 Sep - 18 Oct	Ryanair	direct
18 Sep - 03 Oct	Ryanair	direct
29 Sep - 11 Oct	Ryanair
29 Sep - 11 Oct	Ryanair	direct
27 Sep - 18 Oct	Vueling Airlines

Also check the deals for one-way flights from Brussels to Lisbon 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 Brussels to Lisbon in September from 121€

Return flights