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

Return flights

09 Sep - 16 Sep	Turkish Airlines
03 Sep - 10 Sep	Turkish Airlines
23 Sep - 30 Sep	Turkish Airlines
18 Sep - 25 Sep	Turkish Airlines
15 Sep - 29 Sep	Turkish Airlines
12 Sep - 26 Sep	Turkish Airlines
06 Sep - 20 Sep	Spirit Airlines
12 Sep - 19 Sep	Turkish Airlines
30 Sep - 11 Oct	Turkish Airlines
05 Sep - 20 Sep	Spirit Airlines
06 Sep - 13 Sep	Turkish Airlines
28 Sep - 05 Oct	Turkish Airlines

Also check the deals for one-way flights from Houston 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 Houston to Athens in September from $597

Return flights