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

Return flights

23 Dec - 10 Jan	Arajet
04 Dec - 11 Dec	British Airways	direct
04 Dec - 16 Dec	British Airways	direct
25 Dec - 01 Jan	British Airways	direct
23 Dec - 08 Jan	British Airways	direct
27 Dec - 06 Jan	British Airways	direct
27 Dec - 01 Jan	British Airways	direct
16 Dec - 03 Jan	British Airways	direct
20 Dec - 01 Jan	British Airways	direct
23 Dec - 10 Jan	British Airways	direct
20 Dec - 07 Jan	Avianca
06 Dec - 18 Dec	British Airways	direct
22 Dec - 03 Jan	Iberia
24 Dec - 31 Dec	Avianca
08 Dec - 20 Dec	British Airways

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 $787

Return flights