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

Return flights

27 Jul - 28 Jul	Volotea
28 Jul - 01 Aug	Volotea
30 Jul - 06 Aug	Volotea
28 Jul - 04 Aug	Volotea
31 Jul - 07 Aug	Volotea
27 Jul - 31 Jul	Volotea
28 Jul - 03 Aug	Volotea
28 Jul - 05 Aug	Volotea
28 Jul - 08 Aug	Volotea
28 Jul - 15 Aug	Volotea
29 Jul - 08 Aug	easyJet
28 Jul - 11 Aug	Ryanair	direct

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

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 July from 233€

Return flights