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

Return flights

03 Mar - 17 Mar	Iberia
08 Mar - 21 Mar	Brussels Airlines
20 Mar - 28 Mar	Brussels Airlines
13 Mar - 27 Mar	Air Canada
17 Mar - 24 Mar	SWISS
01 Mar - 15 Mar	Air Canada
06 Mar - 15 Mar	Air Canada
01 Mar - 08 Mar	Air Canada
01 Mar - 31 Mar	Air Canada
31 Mar - 14 Apr	Air Canada
07 Mar - 21 Mar	Brussels Airlines
22 Mar - 04 Apr	SWISS
26 Mar - 07 Apr	Avianca
29 Mar - 08 Apr	Air Canada
19 Mar - 09 Apr	Air Canada
25 Mar - 08 Apr	Air Canada
18 Mar - 02 Apr	Air Canada
23 Mar - 06 Apr	Air Canada
25 Mar - 06 Apr	Air Canada
19 Mar - 02 Apr	Air Canada

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 633€

Return flights