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

Return flights

02 May - 25 May	Air France
13 May - 25 May	Air France
22 May - 08 Jun	Air France
06 May - 20 May	Air France
23 May - 15 Jun	Air France
04 May - 18 May	Air France
07 May - 22 May	KLM
03 May - 22 May	Air France
04 May - 22 May	Air France
02 May - 22 May	Air France
17 May - 28 Jun	Air France
21 May - 06 Jun	KLM
24 May - 06 Jun	Air France
26 May - 06 Jun	KLM
16 May - 06 Jun	Air France
08 May - 20 May	Air France
01 May - 18 May	Air France
26 May - 02 Jun	KLM
26 May - 09 Jun	KLM
16 May - 02 Jun	Air France

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 537€

Return flights