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

Return flights

10 Mar - 17 Mar	British Airways
09 Mar - 20 Apr	SWISS
29 Mar - 22 Apr	SWISS
10 Mar - 19 Mar	SWISS
05 Mar - 17 Mar	Virgin Atlantic
02 Mar - 14 Mar	Lufthansa
16 Mar - 31 Mar	KLM
17 Mar - 24 Mar	Air Canada
10 Mar - 18 Mar	SWISS
06 Mar - 18 Mar	SWISS
07 Mar - 17 Mar	Virgin Atlantic
23 Mar - 08 Apr	SWISS
07 Mar - 16 Mar	KLM
30 Mar - 06 Apr	KLM
24 Mar - 07 Apr	SWISS
09 Mar - 13 Apr	SWISS
30 Mar - 12 Apr	KLM
19 Mar - 08 Apr	SWISS
23 Mar - 01 Apr	SWISS
22 Mar - 06 Apr	SWISS

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 736€

Return flights