Cheapest return flights from Seattle to Beijing in September from $811

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

Return flights

21 Sep - 17 Oct Philippine Airlines
28 Sep - 05 Oct Philippine Airlines
30 Sep - 07 Oct Korean Air
30 Sep - 07 Oct Hainan Airlines direct
23 Sep - 30 Sep Finnair
23 Sep - 30 Sep Hainan Airlines direct

Also check the deals for one-way flights from Seattle to Beijing in September.

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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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