AirHint found the following cheapest return flights from Stuttgart (STR) to Keflavik (KEF) in May 2026 (see full year).
Return flights
| 28 May - 04 Jun | KLM | ||
| 17 May - 24 May | KLM | ||
| 01 May - 10 May | Austrian Airlines | ||
| 24 May - 01 Jun | Scandinavian Airlines | ||
| 28 May - 05 Jun | KLM | ||
| 26 May - 05 Jun | KLM | ||
| 23 May - 31 May | KLM |
Also check the deals for one-way flights from Stuttgart to Keflavik in May.
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