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

Return flights

22 Sep - 03 Oct	Ryanair
28 Sep - 30 Sep	British Airways
25 Sep - 29 Sep	Lufthansa
04 Sep - 20 Sep	Lufthansa
30 Sep - 18 Oct	KLM
11 Sep - 14 Sep	Lufthansa
12 Sep - 14 Sep	Lufthansa
26 Sep - 12 Oct	Lufthansa
22 Sep - 22 Sep	Lufthansa
05 Sep - 07 Sep	KLM
26 Sep - 28 Sep	KLM
22 Sep - 03 Oct	LOT	direct
25 Sep - 29 Sep	LOT	direct
26 Sep - 12 Oct	LOT	direct
11 Sep - 14 Sep	LOT	direct

Also check the deals for one-way flights from Luxemburg to Warsaw 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.

Book a cheap hotel in Warsaw

Cheap car rent in Warsaw

Cheapest return flights from Luxemburg to Warsaw in September from $155

Return flights