Cheapest return flights from Cardiff to Kos in September from $279

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

Return flights

15 Sep - 22 Sep Ryanair
13 Sep - 17 Sep Ryanair
01 Sep - 08 Sep Ryanair
13 Sep - 17 Sep TUI direct
03 Sep - 10 Sep Vueling Airlines
16 Sep - 23 Sep Vueling Airlines
17 Sep - 24 Sep Aer Lingus
07 Sep - 11 Sep Ryanair
03 Sep - 10 Sep TUI direct
17 Sep - 24 Sep TUI direct

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

Skyscanner

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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