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

Return flights

02 Sep - 24 Sep	SWISS
18 Sep - 03 Oct	Air France
23 Sep - 06 Oct	Air France
08 Sep - 24 Sep	Air Canada
05 Sep - 27 Sep	KLM
25 Sep - 10 Oct	SWISS
04 Sep - 30 Sep	Air France
02 Sep - 17 Sep	SWISS
05 Sep - 28 Sep	KLM
26 Sep - 11 Oct	Ryanair
27 Sep - 11 Oct	Ryanair
26 Sep - 10 Oct	Ryanair
29 Sep - 14 Oct	Eurowings
08 Sep - 21 Sep	Iberia
30 Sep - 14 Oct	Lufthansa
04 Sep - 12 Sep	SWISS
27 Sep - 10 Oct	Air France

Also check the deals for one-way flights from Hamburg 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 Hamburg to San Jose in September from 510€

Return flights