AirHint found the following cheapest return flights from Lille (LIL) to Porto (OPO) in October 2025 (see full year).

Return flights

03 Oct - 20 Oct	Ryanair	direct
06 Oct - 10 Oct	Ryanair	direct
27 Oct - 14 Nov	Ryanair	direct
03 Oct - 24 Oct	Ryanair	direct
10 Oct - 13 Oct	Ryanair	direct
03 Oct - 06 Oct	Ryanair
13 Oct - 20 Oct	Ryanair	direct
17 Oct - 20 Oct	Ryanair	direct
09 Oct - 13 Oct	easyJet
03 Oct - 06 Oct	Ryanair	direct
13 Oct - 24 Oct	Ryanair	direct

Also check the deals for one-way flights from Lille to Porto in October.

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 Lille to Porto in October from 106€

Return flights