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

Return flights

13 Sep - 20 Sep	Asiana Airlines
12 Sep - 25 Sep	Delta	direct
13 Sep - 20 Sep	Delta	direct
26 Sep - 03 Oct	Eastar Jet
28 Sep - 09 Oct	Hong Kong Airlines
26 Sep - 11 Oct	Eastar Jet
27 Sep - 04 Oct	China Eastern
26 Sep - 03 Oct	Delta	direct
29 Sep - 07 Oct	ANA
26 Sep - 07 Oct	ANA
27 Sep - 04 Oct	Delta	direct
28 Sep - 09 Oct	Delta	direct
26 Sep - 05 Oct	Delta	direct

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

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 Shanghai to Seattle in September from $845

Return flights