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

Return flights

15 Sep - 21 Sep	easyJet	direct
22 Sep - 25 Sep	easyJet	direct
22 Sep - 29 Sep	easyJet	direct
16 Sep - 23 Sep	Ryanair
03 Sep - 07 Sep	TUI	direct
15 Sep - 18 Sep	easyJet
15 Sep - 18 Sep	easyJet	direct
11 Sep - 15 Sep	easyJet
08 Sep - 11 Sep	easyJet	direct
18 Sep - 25 Sep	Ryanair
29 Sep - 06 Oct	Ryanair
29 Sep - 06 Oct	easyJet	direct
28 Sep - 05 Oct	British Airways	direct
30 Sep - 07 Oct	SKY express
26 Sep - 07 Oct	SKY express
22 Sep - 07 Oct	SKY express
23 Sep - 07 Oct	SKY express
24 Sep - 07 Oct	SKY express
18 Sep - 07 Oct	SKY express
27 Sep - 07 Oct	SKY express

Also check the deals for one-way flights from Kos to London 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 London in September from 112€

Return flights