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

Return flights

18 Sep - 30 Sep	Avianca
18 Sep - 27 Sep	Avianca
18 Sep - 29 Sep	Avianca
07 Sep - 08 Sep	Avianca
22 Sep - 06 Oct	Spirit Airlines
08 Sep - 06 Oct	Avianca
18 Sep - 28 Sep	Avianca
24 Sep - 05 Oct	Avianca
05 Sep - 14 Sep	jetBlue
07 Sep - 05 Oct	Avianca
22 Sep - 10 Oct	Avianca
27 Sep - 27 Oct	Spirit Airlines
11 Sep - 11 Oct	Spirit Airlines
13 Sep - 30 Sep	Volaris Costa Rica
19 Sep - 28 Sep	Spirit Airlines
15 Sep - 11 Oct	Avianca
20 Sep - 01 Oct	Avianca
03 Sep - 17 Sep	Spirit Airlines
03 Sep - 02 Oct	Spirit Airlines

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

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 September from $621

Return flights