Cheapest return FRA–SJO flights, May

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

Return flights

13 May - 10 Jun KLM
15 May - 10 Jun KLM
11 May - 08 Jun KLM
03 May - 28 Jun KLM
20 May - 10 Jun KLM
26 May - 13 Jun KLM
25 May - 10 Jun KLM
20 May - 29 Jun KLM
20 May - 30 Jun KLM
25 May - 22 Jun KLM
23 May - 30 May Air France
01 May - 06 May KLM
18 May - 30 May KLM
02 May - 09 May Air France
24 May - 31 May Air France
28 May - 31 May KLM
12 May - 28 May United
11 May - 28 May United
05 May - 12 May Air France
13 May - 25 May KLM

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

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