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

Return flights

19 Oct - 25 Oct	Asiana Airlines
02 Oct - 21 Oct	Delta	direct
01 Oct - 15 Oct	Delta	direct
22 Oct - 31 Oct	Delta	direct
15 Oct - 09 Nov	Delta	direct
05 Oct - 12 Oct	Delta	direct
04 Oct - 13 Oct	United
19 Oct - 25 Oct	Delta	direct
05 Oct - 18 Oct	United
04 Oct - 17 Oct	United
12 Oct - 10 Nov	United
10 Oct - 23 Oct	China Airlines	direct
12 Oct - 10 Nov	Delta	direct

Also check the deals for one-way flights from Seattle to Taipei 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 Taipei in October from 537€

Return flights