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

Return flights

04 Dec - 11 Dec	TAP
02 Dec - 11 Dec	TAP
02 Dec - 10 Dec	TAP
02 Dec - 09 Dec	TAP
11 Dec - 22 Jan	TAP
30 Dec - 26 Jan	TAP
05 Dec - 10 Dec	Spirit Airlines
06 Dec - 31 Jan	TAP
30 Dec - 14 Jan	Iberia	direct
11 Dec - 31 Jan	TAP
03 Dec - 10 Dec	Iberia	direct
03 Dec - 11 Dec	Iberia	direct
01 Dec - 11 Dec	British Airways	direct
09 Dec - 23 Dec	Iberia	direct
01 Dec - 25 Dec	British Airways	direct
30 Dec - 26 Jan	Iberia	direct
29 Dec - 18 Jan	British Airways	direct
30 Dec - 24 Jan	Iberia	direct
29 Dec - 12 Jan	British Airways	direct
29 Dec - 17 Jan	British Airways	direct

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 $438

Return flights