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

One-Way flights

25 Aug	Alaska Airlines
28 Aug	Alaska Airlines
24 Aug	Air Canada
01 Aug	Asiana Airlines
08 Aug	Asiana Airlines
22 Aug	Korean Air
27 Aug	Air Canada
04 Aug	Asiana Airlines
04 Aug	Delta	direct
10 Aug	Delta	direct

Also check the deals for return flights from Seattle to Shanghai 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 one-way flights from Seattle to Shanghai in August from $371

One-Way flights