AirHint found the following cheapest return flights from San Jose (SJO) to London (LGW) in August 2025 (see full year).

Return flights

13 Aug - 26 Aug	Avianca
01 Aug - 01 Sep	Avianca
13 Aug - 20 Aug	Avianca
14 Aug - 24 Aug	Avianca
15 Aug - 23 Aug	Avianca
23 Aug - 30 Aug	Avianca
19 Aug - 12 Sep	Avianca
27 Aug - 18 Sep	Avianca
28 Aug - 18 Sep	Avianca
25 Aug - 18 Sep	Avianca
01 Aug - 13 Aug	Avianca
26 Aug - 18 Sep	Avianca
29 Aug - 18 Sep	Avianca
09 Aug - 06 Sep	Copa
01 Aug - 17 Aug	Avianca
22 Aug - 15 Sep	Copa
06 Aug - 09 Aug	Avianca
31 Aug - 12 Sep	Avianca

Also check the deals for one-way flights from San Jose to London in August.

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 August from 530€

Return flights