Cheapest return flights from London to Kos in September from $207

Best time to book flights for London (STN) to Kos (KGS) flights at AirHint

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

Return flights

15 Sep - 22 Sep Ryanair
16 Sep - 23 Sep Ryanair
22 Sep - 29 Sep Ryanair
18 Sep - 23 Sep Ryanair
27 Sep - 03 Oct Ryanair
19 Sep - 25 Sep Ryanair
19 Sep - 23 Sep Ryanair
09 Sep - 23 Sep Ryanair
20 Sep - 26 Sep Ryanair
09 Sep - 15 Sep Ryanair
13 Sep - 23 Sep Ryanair
24 Sep - 01 Oct Ryanair
27 Sep - 04 Oct Ryanair
22 Sep - 09 Oct Ryanair direct
24 Sep - 01 Oct Jet2 direct
27 Sep - 04 Oct Jet2 direct
27 Sep - 03 Oct Jet2 direct

Also check the deals for one-way flights from London 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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