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

Return flights

30 Dec - 13 Jan	SWISS
31 Dec - 14 Jan	Lufthansa
10 Dec - 15 Dec	Air France
03 Dec - 10 Dec	Delta
04 Dec - 11 Dec	SWISS
03 Dec - 21 Dec	British Airways
10 Dec - 13 Dec	Delta
25 Dec - 10 Jan	British Airways
29 Dec - 10 Jan	Spirit Airlines
13 Dec - 18 Dec	British Airways
28 Dec - 07 Jan	British Airways
23 Dec - 10 Jan	Spirit Airlines
22 Dec - 11 Jan	Spirit Airlines
03 Dec - 31 Dec	SWISS
04 Dec - 31 Dec	Lufthansa
17 Dec - 08 Jan	Frontier Airlines
14 Dec - 04 Jan	Frontier Airlines
22 Dec - 05 Jan	Spirit Airlines
24 Dec - 31 Dec	Turkish Airlines
20 Dec - 27 Dec	Turkish Airlines

Also check the deals for one-way flights from Houston to Athens in December.

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 December from 422€

Return flights