AirHint found the following cheapest return flights from Toulouse (TLS) to Lille (LIL) in September 2025 (see full year).

Return flights

28 Sep - 01 Oct	Volotea
28 Sep - 29 Sep	Ryanair
25 Sep - 01 Oct	Ryanair
28 Sep - 05 Oct	Ryanair
29 Sep - 01 Oct	Ryanair
25 Sep - 28 Sep	Ryanair
24 Sep - 01 Oct	Volotea
26 Sep - 29 Sep	Volotea
22 Sep - 29 Sep	Volotea	direct
22 Sep - 28 Sep	Volotea	direct
26 Sep - 28 Sep	Volotea
29 Sep - 09 Oct	Ryanair
22 Sep - 04 Oct	Ryanair
22 Sep - 05 Oct	Volotea	direct
22 Sep - 06 Oct	Volotea	direct
28 Sep - 06 Oct	Volotea	direct
24 Sep - 28 Sep	Volotea
25 Sep - 27 Sep	Volotea
28 Sep - 29 Sep	Volotea	direct
24 Sep - 27 Sep	Volotea

Also check the deals for one-way flights from Toulouse to Lille 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 Toulouse to Lille in September from $207

Return flights