AirHint found the following cheapest return flights from London (LON) to Santander (SDR) in March 2026 (see full year).

Return flights

12 Mar - 19 Mar	Ryanair	direct
25 Mar - 28 Mar	Vueling Airlines
02 Mar - 05 Mar	Vueling Airlines
23 Mar - 27 Mar	Vueling Airlines
12 Mar - 15 Mar	Vueling Airlines
13 Mar - 15 Mar	Vueling Airlines
13 Mar - 16 Mar	Vueling Airlines
01 Mar - 07 Mar	Iberia
06 Mar - 07 Mar	Iberia
12 Mar - 18 Mar	Iberia
23 Mar - 02 Apr	British Airways
23 Mar - 03 Apr	British Airways
30 Mar - 10 Apr	British Airways
30 Mar - 03 Apr	British Airways

Also check the deals for one-way flights from London to Santander in March.

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 London to Santander in March from 93€

Return flights