AirHint found the following cheapest return flights from Athens (ATH) to Santorini (Thira) (JTR) in September 2025 (see full year).

Return flights

30 Sep - 14 Oct	Ryanair	direct
30 Sep - 07 Oct	Ryanair	direct
30 Sep - 18 Oct	SKY express	direct
29 Sep - 18 Oct	SKY express	direct
30 Sep - 09 Oct	Ryanair	direct
30 Sep - 21 Oct	SKY express	direct
29 Sep - 14 Oct	SKY express	direct
29 Sep - 07 Oct	SKY express	direct
30 Sep - 11 Oct	SKY express	direct
29 Sep - 11 Oct	SKY express	direct
30 Sep - 30 Sep	Ryanair	direct
29 Sep - 30 Sep	Aegean Airlines	direct

Also check the deals for one-way flights from Athens to Santorini (Thira) 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 Athens to Santorini (Thira) in September from $83

Return flights