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

Return flights

17 Sep - 24 Sep	Ryanair
17 Sep - 22 Oct	Ryanair
20 Sep - 24 Sep	Ryanair
18 Sep - 25 Sep	Ryanair
18 Sep - 24 Sep	Ryanair
22 Sep - 29 Sep	Ryanair
19 Sep - 23 Sep	SKY express
16 Sep - 21 Oct	SKY express
23 Sep - 30 Sep	SKY express
02 Sep - 05 Sep	Wizz Air Malta
23 Sep - 30 Sep	easyJet	direct
18 Sep - 25 Sep	easyJet	direct
16 Sep - 21 Oct	easyJet	direct

Also check the deals for one-way flights from Skiathos 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 Skiathos to London in September from 148€

Return flights