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

Return flights

23 Sep - 03 Oct	Delta
25 Sep - 30 Sep	Air France
18 Sep - 24 Sep	Frontier Airlines
28 Sep - 03 Oct	Frontier Airlines
20 Sep - 26 Sep	Frontier Airlines
25 Sep - 18 Oct	Frontier Airlines
17 Sep - 24 Sep	Spirit Airlines
20 Sep - 28 Sep	Frontier Airlines
17 Sep - 23 Sep	Spirit Airlines
17 Sep - 20 Oct	Spirit Airlines
20 Sep - 27 Sep	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.

Book a cheap hotel in Athens

Cheap car rent in Athens

Cheapest return flights from Houston to Athens in September from 560€

Return flights