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

Return flights

03 Dec - 13 Dec	Icelandair
09 Dec - 15 Dec	Icelandair
30 Dec - 09 Jan	Icelandair
14 Dec - 09 Jan	Icelandair
29 Dec - 09 Jan	Icelandair
16 Dec - 10 Jan	Icelandair
14 Dec - 15 Jan	Icelandair
29 Dec - 08 Jan	Icelandair
17 Dec - 10 Jan	Icelandair
05 Dec - 07 Dec	Icelandair
16 Dec - 31 Dec	Icelandair
18 Dec - 10 Jan	Icelandair
25 Dec - 17 Jan	Icelandair
01 Dec - 11 Dec	Icelandair
22 Dec - 17 Jan	Icelandair
18 Dec - 31 Dec	Icelandair
03 Dec - 27 Dec	Icelandair
22 Dec - 31 Dec	Icelandair
15 Dec - 29 Dec	Icelandair
08 Dec - 22 Dec	Icelandair

Also check the deals for one-way flights from San Jose 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 San Jose to London in December from $919

Return flights