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

Return flights

22 May - 25 May	Air Canada
17 May - 07 Jun	KLM
09 May - 07 Jun	Air France
07 May - 14 May	Air Canada
07 May - 28 May	Air Canada
12 May - 28 May	Air Canada
02 May - 18 May	Air Canada
28 May - 13 Jun	KLM
12 May - 23 May	Air France
11 May - 17 May	KLM
19 May - 02 Jun	United
04 May - 24 May	KLM
14 May - 29 May	Lufthansa
02 May - 30 May	Air Canada
14 May - 06 Jun	Air France
23 May - 06 Jun	Air France
23 May - 02 Jun	Ryanair
23 May - 07 Jun	Ryanair
25 May - 05 Jun	United
23 May - 06 Jun	Lufthansa	direct

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 510€

Return flights