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

Return flights

02 Dec - 09 Dec	Delta
03 Dec - 09 Dec	Delta
03 Dec - 11 Dec	Delta
15 Dec - 10 Jan	United
07 Dec - 18 Dec	KLM
08 Dec - 18 Dec	KLM
09 Dec - 18 Dec	KLM
28 Dec - 17 Jan	Virgin Atlantic
16 Dec - 10 Jan	Virgin Atlantic
10 Dec - 10 Jan	Iberia
16 Dec - 08 Jan	United
14 Dec - 26 Dec	British Airways
12 Dec - 25 Dec	KLM
04 Dec - 27 Dec	United
24 Dec - 31 Dec	Air France
29 Dec - 11 Jan	KLM
28 Dec - 04 Jan	Air France
24 Dec - 12 Jan	Air France
10 Dec - 07 Jan	Air France
09 Dec - 07 Jan	Air France

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 507€

Return flights