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

Return flights

15 Sep - 22 Sep	Asiana Airlines
06 Sep - 21 Sep	ANA
08 Sep - 16 Sep	ANA
17 Sep - 19 Sep	Korean Air
17 Sep - 19 Sep	Delta	direct
15 Sep - 17 Sep	Delta
15 Sep - 22 Sep	Delta	direct
17 Sep - 24 Sep	Delta	direct
26 Sep - 10 Oct	Philippine Airlines
24 Sep - 07 Oct	Korean Air
25 Sep - 09 Oct	Korean Air
01 Sep - 31 Oct	Delta	direct
24 Sep - 05 Oct	Delta	direct
29 Sep - 05 Oct	Asiana Airlines
30 Sep - 14 Oct	Spring Airlines
29 Sep - 05 Oct	Delta	direct
28 Sep - 05 Oct	Delta	direct
28 Sep - 09 Oct	Air China

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 618€

Return flights