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

Return flights

02 Mar - 16 Mar	Icelandair
04 Mar - 17 Mar	Icelandair
09 Mar - 16 Mar	Icelandair
01 Mar - 09 Mar	Icelandair
02 Mar - 09 Mar	Icelandair
09 Mar - 23 Mar	Icelandair
06 Mar - 16 Mar	Icelandair
03 Mar - 17 Mar	Icelandair
09 Mar - 19 Mar	Icelandair
03 Mar - 10 Mar	Icelandair
11 Mar - 14 Apr	Iberia
11 Mar - 08 Apr	Avianca
15 Mar - 15 Apr	Avianca
19 Mar - 02 Apr	Avianca
09 Mar - 01 Apr	Avianca
31 Mar - 16 Apr	Air Canada
31 Mar - 17 Apr	Air Canada
30 Mar - 16 Apr	Lufthansa
23 Mar - 03 Apr	Avianca
22 Mar - 07 Apr	Avianca

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