AirHint found the following cheapest return flights from London (LGW) to Luxemburg (LUX) in December 2025 (see full year).

Return flights

12 Dec - 15 Dec	Vueling Airlines
11 Dec - 14 Dec	Ryanair
12 Dec - 14 Dec	Vueling Airlines
04 Dec - 06 Dec	Vueling Airlines
05 Dec - 07 Dec	easyJet
13 Dec - 13 Dec	Vueling Airlines
19 Dec - 22 Dec	easyJet
18 Dec - 21 Dec	easyJet
08 Dec - 12 Dec	easyJet
19 Dec - 21 Dec	easyJet
20 Dec - 17 Jan	SWISS
29 Dec - 02 Jan	easyJet
27 Dec - 03 Jan	Vueling Airlines
20 Dec - 03 Jan	SWISS
20 Dec - 01 Jan	SWISS

Also check the deals for one-way flights from London to Luxemburg in December.

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 London to Luxemburg in December from 135€

Return flights