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

Return flights

29 Dec - 16 Jan	KLM
29 Dec - 18 Jan	KLM
08 Dec - 15 Dec	Lufthansa
30 Dec - 19 Jan	British Airways
29 Dec - 20 Jan	Delta
29 Dec - 19 Jan	Air France
31 Dec - 07 Jan	Spirit Airlines
28 Dec - 19 Jan	Spirit Airlines
30 Dec - 06 Jan	Spirit Airlines
12 Dec - 19 Dec	Spirit Airlines
17 Dec - 24 Dec	Air Canada
29 Dec - 05 Jan	Spirit Airlines
23 Dec - 06 Jan	Frontier Airlines
24 Dec - 31 Dec	Spirit Airlines
22 Dec - 29 Dec	Virgin Atlantic
21 Dec - 28 Dec	Virgin Atlantic
18 Dec - 25 Dec	KLM
23 Dec - 30 Dec	Frontier Airlines
20 Dec - 27 Dec	Frontier Airlines
19 Dec - 26 Dec	Spirit Airlines

Also check the deals for one-way flights from Austin 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 Austin to Athens in December from 592€

Return flights