AirHint found the following cheapest return flights from San Jose (SJO) to Frankfurt (FRA) in August 2025 (see full year).

Return flights

10 Aug - 25 Sep	Avianca
10 Aug - 26 Sep	Avianca
07 Aug - 21 Aug	Avianca
09 Aug - 25 Sep	Spirit Airlines
29 Aug - 25 Sep	Air France
30 Aug - 16 Sep	Air France
29 Aug - 19 Sep	Air France
30 Aug - 20 Sep	Air France
12 Aug - 27 Sep	Avianca
21 Aug - 04 Sep	Avianca
11 Aug - 30 Sep	Avianca
14 Aug - 21 Aug	Air France
05 Aug - 16 Aug	Lufthansa	direct
14 Aug - 21 Aug	Lufthansa	direct
07 Aug - 21 Aug	Lufthansa	direct

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

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 San Jose to Frankfurt in August from 667€

Return flights