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

Return flights

08 Mar - 17 Mar	Icelandair
05 Mar - 09 Mar	Icelandair
01 Mar - 09 Mar	Icelandair
06 Mar - 10 Mar	Icelandair
01 Mar - 10 Mar	Icelandair
06 Mar - 17 Mar	Icelandair
05 Mar - 17 Mar	Icelandair
04 Mar - 17 Mar	Icelandair
05 Mar - 16 Mar	Icelandair
10 Mar - 18 Mar	jetBlue
14 Mar - 22 Apr	Avianca
19 Mar - 15 Apr	Air Canada
31 Mar - 08 Apr	Austrian Airlines
31 Mar - 15 Apr	Air Canada
03 Mar - 01 Apr	Air Canada
19 Mar - 02 Apr	Air Canada
19 Mar - 16 Apr	Air Canada
01 Mar - 24 Apr	Air Canada
09 Mar - 08 Apr	Air Canada
02 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 516€

Return flights