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

Return flights

12 Mar - 28 Mar	SWISS
10 Mar - 18 Mar	SWISS
10 Mar - 17 Mar	SWISS
02 Mar - 25 Mar	Lufthansa
12 Mar - 24 Mar	Iberia
30 Mar - 16 Apr	Lufthansa
17 Mar - 26 Mar	SWISS
22 Mar - 31 Mar	Air Canada
06 Mar - 31 Mar	Air Canada
03 Mar - 28 Mar	Air Canada
19 Mar - 26 Mar	Air Canada
18 Mar - 02 Apr	Brussels Airlines
26 Mar - 02 Apr	United
23 Mar - 08 Apr	United
19 Mar - 08 Apr	United
26 Mar - 08 Apr	United
25 Mar - 08 Apr	United
26 Mar - 17 Apr	Iberia
26 Mar - 10 Apr	Iberia
24 Mar - 07 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 522€

Return flights