AirHint found the following cheapest return flights from Seattle (SEA) to Athens (ATH) in August 2025 (see full year).

Return flights

27 Aug - 10 Sep	Lufthansa
20 Aug - 27 Aug	Air Canada
27 Aug - 05 Sep	Air Canada
26 Aug - 05 Sep	Air Canada
20 Aug - 03 Sep	Air Canada
09 Aug - 22 Aug	Virgin Atlantic
27 Aug - 06 Sep	Air Canada
28 Aug - 09 Sep	Air Canada
27 Aug - 07 Sep	Lufthansa
28 Aug - 18 Sep	Air Canada
08 Aug - 22 Aug	British Airways
07 Aug - 22 Aug	British Airways
06 Aug - 20 Aug	Turkish Airlines
03 Aug - 22 Aug	Air Canada
10 Aug - 19 Aug	Air Canada
14 Aug - 25 Aug	Air Canada
03 Aug - 17 Aug	Scandinavian Airlines
02 Aug - 09 Aug	Turkish Airlines

Also check the deals for one-way flights from Seattle to Athens in August.

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 Seattle to Athens in August from $489

Return flights