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

Return flights

09 Dec - 16 Dec	Ryanair
03 Dec - 06 Dec	Wizz Air UK
02 Dec - 06 Dec	Wizz Air UK
06 Dec - 08 Dec	Wizz Air UK
10 Dec - 15 Dec	Vueling Airlines
02 Dec - 04 Dec	Vueling Airlines
06 Dec - 09 Dec	Wizz Air UK
13 Dec - 14 Dec	Wizz Air UK
12 Dec - 16 Dec	Wizz Air UK
02 Dec - 03 Dec	Vueling Airlines
20 Dec - 09 Jan	easyJet
17 Dec - 03 Jan	easyJet
28 Dec - 02 Jan	Ryanair
20 Dec - 03 Jan	Vueling Airlines
30 Dec - 03 Jan	Vueling Airlines
30 Dec - 19 Jan	Air Europa
31 Dec - 03 Jan	Iberia
31 Dec - 01 Jan	Vueling Airlines
29 Dec - 03 Jan	Iberia
23 Dec - 03 Jan	Air Europa

Also check the deals for one-way flights from London to Brussels 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 Brussels in December from 111€

Return flights