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

Return flights

03 Oct - 24 Oct	Korean Air
05 Oct - 26 Oct	Korean Air
06 Oct - 27 Oct	Korean Air
06 Oct - 28 Oct	Korean Air
06 Oct - 29 Oct	Korean Air
06 Oct - 30 Oct	Korean Air
14 Oct - 27 Oct	Korean Air
14 Oct - 28 Oct	Korean Air
14 Oct - 29 Oct	Korean Air
14 Oct - 30 Oct	Korean Air
14 Oct - 01 Nov	Korean Air
14 Oct - 02 Nov	Korean Air
14 Oct - 03 Nov	Korean Air
14 Oct - 04 Nov	Korean Air
13 Oct - 03 Nov	ANA
12 Oct - 03 Nov	ANA
09 Oct - 03 Nov	ANA
09 Oct - 01 Nov	Hainan Airlines
09 Oct - 02 Nov	Hainan Airlines
11 Oct - 03 Nov	ANA

Also check the deals for one-way flights from Seattle to Shanghai 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 return flights from Seattle to Shanghai in October from $876

Return flights