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

Return flights

25 Sep - 25 Oct	easyJet	direct
18 Sep - 25 Oct	easyJet	direct
23 Sep - 25 Oct	Vueling Airlines
23 Sep - 25 Oct	easyJet	direct
24 Sep - 25 Oct	Wizz Air Malta
21 Sep - 25 Oct	Wizz Air Malta
20 Sep - 25 Oct	Wizz Air Malta
22 Sep - 25 Oct	easyJet
19 Sep - 25 Oct	Wizz Air
27 Sep - 10 Oct	easyJet
01 Sep - 04 Sep	Wizz Air Malta
03 Sep - 11 Sep	Wizz Air Malta
18 Sep - 24 Sep	easyJet
18 Sep - 25 Sep	easyJet
02 Sep - 11 Sep	easyJet
25 Sep - 29 Sep	easyJet
09 Sep - 17 Sep	Vueling Airlines
01 Sep - 08 Sep	Vueling Airlines
09 Sep - 15 Sep	Wizz Air Malta
03 Sep - 10 Sep	Wizz Air Malta

Also check the deals for one-way flights from London to Skiathos 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 London to Skiathos in September from $75

Return flights