AirHint found the following cheapest return flights from Luxemburg (LUX) to Lisbon (LIS) in September 2025 (see full year).

Return flights

23 Sep - 14 Oct	Ryanair	direct
30 Sep - 09 Oct	easyJet	direct
23 Sep - 07 Oct	Ryanair	direct
30 Sep - 02 Oct	easyJet	direct
20 Sep - 14 Oct	Ryanair	direct
30 Sep - 07 Oct	Ryanair	direct
27 Sep - 07 Oct	Ryanair	direct
27 Sep - 02 Oct	Ryanair	direct
20 Sep - 07 Oct	Ryanair	direct
27 Sep - 10 Oct	Ryanair	direct
16 Sep - 30 Sep	Ryanair
22 Sep - 30 Sep	TAP
20 Sep - 22 Sep	Ryanair
23 Sep - 30 Sep	Ryanair	direct
16 Sep - 22 Sep	Ryanair
17 Sep - 30 Sep	TAP
16 Sep - 24 Sep	Ryanair
20 Sep - 30 Sep	Ryanair
23 Sep - 24 Sep	Ryanair
16 Sep - 25 Sep	Ryanair

Also check the deals for one-way flights from Luxemburg 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 Luxemburg to Lisbon in September from $79

Return flights