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

Return flights

23 Apr - 14 May	SWISS
30 Apr - 14 May	Air Canada
11 Apr - 29 Apr	Air Canada
06 Apr - 22 Apr	Air Canada
10 Apr - 15 May	Air Canada
13 Apr - 28 Apr	Air Canada
13 Apr - 26 Apr	Air Canada
30 Apr - 16 May	United
07 Apr - 16 May	United
11 Apr - 09 May	Air Canada
17 Apr - 16 May	United
18 Apr - 05 May	KLM
12 Apr - 18 Apr	Air France
11 Apr - 16 May	Air Canada
21 Apr - 30 Apr	KLM
15 Apr - 02 May	United
05 Apr - 22 Apr	United
05 Apr - 21 Apr	United
21 Apr - 30 Apr	Lufthansa	direct
11 Apr - 18 Apr	Air Canada

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

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 April from 542€

Return flights