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

Return flights

25 Mar - 29 Mar	Iberia
02 Mar - 09 Mar	British Airways
29 Mar - 18 Apr	British Airways
27 Mar - 18 Apr	British Airways
28 Mar - 18 Apr	British Airways
15 Mar - 04 Apr	British Airways
21 Mar - 11 Apr	British Airways
26 Mar - 31 Mar	British Airways
01 Mar - 05 Mar	Icelandair
23 Mar - 31 Mar	Icelandair
08 Mar - 13 Mar	Icelandair
02 Mar - 28 Mar	Alaska Airlines
31 Mar - 11 Apr	Lufthansa
12 Mar - 23 Mar	Icelandair
29 Mar - 09 Apr	Lufthansa
22 Mar - 31 Mar	Icelandair
23 Mar - 27 Mar	Icelandair
19 Mar - 03 Apr	British Airways
14 Mar - 04 Apr	British Airways
13 Mar - 04 Apr	Icelandair

Also check the deals for one-way flights from San Jose to London 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 San Jose to London in March from $685

Return flights