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

Return flights

24 Sep - 01 Oct	Ryanair
03 Sep - 10 Sep	Ryanair
23 Sep - 30 Sep	Ryanair
04 Sep - 11 Sep	Ryanair
04 Sep - 11 Sep	easyJet	direct
23 Sep - 30 Sep	easyJet	direct
05 Sep - 09 Sep	SKY express
05 Sep - 19 Sep	SKY express
05 Sep - 26 Sep	SKY express
05 Sep - 25 Sep	SKY express
05 Sep - 23 Sep	SKY express

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 200€

Return flights