AirHint found the following cheapest return flights from Basel (BSL) to San Jose (SJO) in April 2026 (see full year).
Return flights
| 25 Apr - 03 May | Ryanair | ||
| 01 Apr - 10 Apr | Air France | ||
| 03 Apr - 12 Apr | KLM | ||
| 04 Apr - 17 Apr | Lufthansa |
Also check the deals for one-way flights from Basel to San Jose in April.
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