AirHint found the following cheapest return flights from San Diego (SAN) to Madrid (MAD) in December 2025 (see full year).

Return flights

01 Dec - 09 Dec	Delta
29 Dec - 24 Jan	Air France
01 Dec - 08 Dec	Iberia
05 Dec - 12 Dec	Iberia
07 Dec - 14 Dec	Iberia
03 Dec - 10 Dec	Iberia
24 Dec - 17 Jan	United
01 Dec - 27 Dec	British Airways
11 Dec - 18 Dec	Iberia
04 Dec - 27 Dec	British Airways
15 Dec - 22 Dec	Lufthansa
15 Dec - 10 Jan	Hawaiian Airlines
15 Dec - 08 Jan	Hawaiian Airlines
30 Dec - 09 Jan	Hawaiian Airlines
28 Dec - 08 Jan	Lufthansa
28 Dec - 07 Jan	Lufthansa
15 Dec - 21 Dec	Lufthansa
28 Dec - 05 Jan	Alaska Airlines
19 Dec - 10 Jan	Frontier Airlines
09 Dec - 03 Jan	Hawaiian Airlines

Also check the deals for one-way flights from San Diego to Madrid 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 Diego to Madrid in December from 379€

Return flights