AirHint found the following cheapest return flights from London (STN) to Athens (ATH) in September 2026 (see full year).

Return flights

27 Sep - 16 Oct	Ryanair	direct
26 Sep - 16 Oct	Ryanair	direct
29 Sep - 16 Oct	Ryanair	direct
22 Sep - 07 Oct	Ryanair	direct
29 Sep - 07 Oct	Ryanair	direct
07 Sep - 16 Sep	Ryanair
22 Sep - 09 Oct	Ryanair	direct
20 Sep - 07 Oct	Ryanair	direct
29 Sep - 19 Oct	Ryanair	direct
20 Sep - 09 Oct	Ryanair	direct
27 Sep - 07 Oct	Ryanair	direct
08 Sep - 16 Sep	Ryanair
20 Sep - 23 Sep	Ryanair
15 Sep - 18 Sep	Ryanair
22 Sep - 26 Sep	Ryanair
17 Sep - 24 Sep	Ryanair
17 Sep - 23 Sep	Ryanair
16 Sep - 23 Sep	Ryanair
22 Sep - 30 Sep	Ryanair	direct
22 Sep - 23 Sep	Ryanair	direct

Also check the deals for one-way flights from London to Athens 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 Athens in September from $139

Return flights