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

Return flights

13 Mar - 31 Mar	Air Canada
05 Mar - 16 Mar	Air Canada
02 Mar - 09 Mar	United
04 Mar - 16 Mar	United
05 Mar - 17 Mar	United
02 Mar - 16 Mar	United
03 Mar - 10 Mar	United
17 Mar - 24 Mar	Brussels Airlines
11 Mar - 25 Mar	United
19 Mar - 02 Apr	United
20 Mar - 28 Mar	Air Canada
25 Mar - 08 Apr	United
24 Mar - 01 Apr	Avianca
21 Mar - 08 Apr	Avianca
30 Mar - 06 Apr	United
20 Mar - 08 Apr	Avianca
27 Mar - 06 Apr	United
29 Mar - 14 Apr	Air Canada
25 Mar - 13 Apr	United
24 Mar - 05 Apr	KLM

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