AirHint found the following cheapest return flights from London (LCY) to San Jose (SJO) in March 2026 (see full year).

Return flights

01 Mar - 09 Mar	SWISS
09 Mar - 17 Mar	SWISS
23 Mar - 30 Mar	SWISS
04 Mar - 18 Mar	Lufthansa
25 Mar - 01 Apr	SWISS
10 Mar - 18 Mar	SWISS
24 Mar - 06 Apr	SWISS
24 Mar - 07 Apr	SWISS
17 Mar - 07 Apr	SWISS
23 Mar - 01 Apr	SWISS
24 Mar - 04 Apr	SWISS
09 Mar - 24 Mar	KLM
03 Mar - 07 Apr	SWISS
03 Mar - 18 Mar	SWISS
11 Mar - 23 Mar	KLM
03 Mar - 10 Mar	SWISS
23 Mar - 31 Mar	SWISS
17 Mar - 02 Apr	KLM
12 Mar - 08 Apr	Iberia
24 Mar - 02 Apr	KLM

Also check the deals for one-way flights from London to San Jose 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 San Jose in March from $816

Return flights