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

Return flights

07 Dec - 12 Dec	Ryanair
08 Dec - 12 Dec	Wizz Air UK
09 Dec - 12 Dec	easyJet
12 Dec - 13 Dec	Ryanair
13 Dec - 16 Dec	Ryanair
11 Dec - 13 Dec	Ryanair
12 Dec - 16 Dec	Ryanair
06 Dec - 12 Dec	Wizz Air
11 Dec - 15 Dec	Ryanair
15 Dec - 16 Jan	Ryanair
06 Dec - 10 Dec	Ryanair
16 Dec - 08 Jan	Ryanair
13 Dec - 04 Jan	Ryanair
12 Dec - 04 Jan	Ryanair
31 Dec - 07 Jan	Wizz Air UK
12 Dec - 11 Jan	Ryanair
29 Dec - 07 Jan	Ryanair
12 Dec - 02 Jan	Ryanair
20 Dec - 09 Jan	Wizz Air UK
18 Dec - 05 Jan	Ryanair

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 92€

Return flights