AirHint found the following cheapest return flights from Southampton (SOU) to Amsterdam (AMS) in September 2026 (see full year).
Return flights
| 24 Sep - 27 Sep | KLM | direct | |
| 04 Sep - 07 Sep | KLM | direct | |
| 21 Sep - 21 Sep | KLM | direct |
Also check the deals for one-way flights from Southampton to Amsterdam in September.
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