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

Return flights

11 Sep - 24 Sep	SWISS
09 Sep - 08 Oct	SWISS
19 Sep - 04 Oct	Air Canada
04 Sep - 27 Sep	Air Canada
02 Sep - 28 Sep	Air Canada
03 Sep - 01 Oct	Air Canada
04 Sep - 08 Oct	Air Canada
03 Sep - 28 Sep	Air Canada
02 Sep - 29 Sep	United
04 Sep - 29 Sep	United
07 Sep - 07 Oct	United
09 Sep - 16 Sep	United
01 Sep - 29 Sep	United
01 Sep - 27 Sep	United
01 Sep - 15 Sep	United
27 Sep - 09 Oct	Air Canada

Also check the deals for one-way flights from Brussels to San Jose 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 Brussels to San Jose in September from 494€

Return flights