AirHint found the following cheapest return flights from Los Angeles (LAX) to London (LHR) in December 2025 (see full year).

Return flights

02 Dec - 10 Dec	TAP
04 Dec - 15 Dec	TAP
02 Dec - 15 Dec	TAP
09 Dec - 16 Dec	TAP
01 Dec - 04 Dec	Scandinavian Airlines
08 Dec - 15 Dec	Air Canada
03 Dec - 17 Dec	Air Canada
10 Dec - 17 Dec	Air Canada
08 Dec - 18 Dec	Aer Lingus
07 Dec - 18 Dec	Aer Lingus
15 Dec - 15 Jan	Air Canada
29 Dec - 12 Jan	Iberia
29 Dec - 07 Jan	Aer Lingus
10 Dec - 14 Jan	Delta	direct
27 Dec - 14 Jan	TAP
15 Dec - 08 Jan	SWISS
24 Dec - 11 Jan	Finnair
23 Dec - 13 Jan	TAP
25 Dec - 17 Jan	TAP
15 Dec - 10 Jan	SWISS

Also check the deals for one-way flights from Los Angeles to London 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 Los Angeles to London in December from $479

Return flights