AirHint found the following cheapest one-way flights from Shanghai (SHA) to Seattle (SEA) in October 2025 (see full year).

One-Way flights

22 Oct	Hainan Airlines
12 Oct	Hong Kong Airlines
05 Oct	Spring Airlines
23 Oct	Asiana Airlines
18 Oct	Air China
29 Oct	Delta	direct
18 Oct	Delta	direct
27 Oct	Delta	direct
28 Oct	Delta	direct
09 Oct	Delta	direct

Also check the deals for return flights from Shanghai to Seattle in October.

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 one-way flights from Shanghai to Seattle in October from $390

One-Way flights