AirHint found the following cheapest return flights from Frankfurt (FRA) to San Jose (SJO) in May 2026 (see full year).

Return flights

07 May - 21 May	SWISS
07 May - 23 May	SWISS
09 May - 30 May	Lufthansa	direct
16 May - 26 May	Lufthansa	direct
02 May - 23 May	Lufthansa	direct
09 May - 26 May	Lufthansa	direct
09 May - 23 May	Lufthansa	direct
23 May - 04 Jun	Lufthansa	direct
11 May - 25 May	Air France
01 May - 15 May	KLM
01 May - 23 May	KLM

Also check the deals for one-way flights from Frankfurt to San Jose in May.

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 Frankfurt to San Jose in May from 511€

Return flights