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

Return flights

14 Aug - 27 Aug	Icelandair
10 Aug - 26 Aug	Aer Lingus
27 Aug - 03 Sep	Aer Lingus
28 Aug - 10 Sep	Icelandair
19 Aug - 25 Aug	Air Canada
20 Aug - 27 Aug	United
26 Aug - 02 Sep	United
18 Aug - 25 Aug	Icelandair
08 Aug - 10 Aug	Lufthansa
01 Aug - 23 Aug	British Airways
12 Aug - 19 Aug	Icelandair
14 Aug - 21 Aug	United
08 Aug - 15 Aug	Icelandair
29 Aug - 21 Sep	TAP
30 Aug - 06 Sep	Icelandair

Also check the deals for one-way flights from Seattle to Berlin 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 Berlin in August from $463

Return flights