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

Return flights

29 Sep - 01 Oct	Ryanair
30 Sep - 04 Oct	TAP
30 Sep - 07 Oct	TAP
30 Sep - 01 Oct	easyJet	direct
26 Sep - 30 Sep	Ryanair
26 Sep - 30 Sep	easyJet	direct
22 Sep - 23 Sep	Ryanair
29 Sep - 02 Oct	Ryanair
30 Sep - 07 Oct	easyJet	direct
25 Sep - 07 Oct	Ryanair
30 Sep - 06 Oct	TAP
23 Sep - 01 Oct	Ryanair
25 Sep - 07 Oct	Ryanair	direct
24 Sep - 27 Sep	Vueling Airlines
22 Sep - 27 Sep	Ryanair
16 Sep - 18 Sep	Ryanair
25 Sep - 27 Sep	Ryanair	direct
24 Sep - 29 Sep	Vueling Airlines
26 Sep - 29 Sep	Ryanair
23 Sep - 28 Sep	Air Europa

Also check the deals for one-way flights from Lisbon to Luxemburg 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 Lisbon to Luxemburg in September from $119

Return flights