AirHint found the following cheapest return flights from San Diego (SAN) to Madrid (MAD) in May 2026 (see full year).

Return flights

05 May - 21 May	Finnair
05 May - 12 May	Iberia
20 May - 27 May	Iberia
07 May - 14 May	Finnair
07 May - 27 May	Finnair
19 May - 24 May	Lufthansa
01 May - 10 May	Lufthansa
14 May - 30 May	Delta
10 May - 17 May	Iberia
01 May - 15 Jun	British Airways
28 May - 04 Jun	British Airways
23 May - 11 Jun	KLM
15 May - 22 May	Iberia
25 May - 01 Jun	Iberia
30 May - 06 Jun	Iberia

Also check the deals for one-way flights from San Diego to Madrid in May.

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 May from $637

Return flights