AirHint found the following cheapest return flights from Kos (KGS) to Amsterdam (AMS) in September 2025 (see full year).

Return flights

23 Sep - 30 Sep	Ryanair
13 Sep - 25 Sep	Ryanair
26 Sep - 28 Sep	Ryanair
20 Sep - 27 Sep	transavia	direct
21 Sep - 28 Sep	transavia	direct
28 Sep - 30 Sep	Ryanair
02 Sep - 09 Sep	Corendon Dutch Airlines	direct
21 Sep - 23 Sep	transavia	direct
09 Sep - 16 Sep	Ryanair
30 Sep - 02 Oct	Ryanair
14 Sep - 21 Sep	easyJet
29 Sep - 01 Oct	Ryanair
21 Sep - 08 Oct	TUI.nl
21 Sep - 05 Oct	TUI.nl	direct
15 Sep - 05 Oct	TUI.nl	direct
20 Sep - 08 Oct	TUI.nl
17 Sep - 08 Oct	TUI.nl
20 Sep - 05 Oct	TUI.nl	direct
21 Sep - 09 Oct	TUI.nl
21 Sep - 07 Oct	TUI.nl

Also check the deals for one-way flights from Kos to Amsterdam in September.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Kos to Amsterdam in September from $221

Return flights