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

Return flights

30 Aug - 06 Sep	Asiana Airlines
30 Aug - 28 Sep	Asiana Airlines
29 Aug - 02 Sep	United
26 Aug - 30 Aug	Cathay Pacific
24 Aug - 31 Aug	Cathay Pacific
20 Aug - 27 Aug	Sichuan Airlines
19 Aug - 26 Aug	Hainan Airlines
19 Aug - 26 Aug	Hainan Airlines	direct

Also check the deals for one-way flights from Beijing to Seattle 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 Beijing to Seattle in August from 717€

Return flights