AirHint found the following cheapest return flights from San Jose (SJO) to Keflavik (KEF) in March 2026 (see full year).
Return flights
| 13 Mar - 24 Mar | KLM | ||
| 20 Mar - 03 Apr | KLM | ||
| 12 Mar - 20 Mar | Iberia | ||
| 12 Mar - 23 Mar | Iberia |
Also check the deals for one-way flights from San Jose to Keflavik in March.
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