AirHint found the following cheapest return flights from San Sebastian (EAS) to London (LCY) in December 2025 (see full year).

Return flights

04 Dec - 07 Dec	Iberia
26 Dec - 30 Dec	Iberia
04 Dec - 08 Dec	Iberia
05 Dec - 09 Dec	Iberia
03 Dec - 07 Dec	Iberia
05 Dec - 08 Dec	Iberia
06 Dec - 09 Dec	Iberia
19 Dec - 23 Dec	Iberia
20 Dec - 03 Jan	Iberia

Also check the deals for one-way flights from San Sebastian 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 Sebastian to London in December from 349€

Return flights