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

Return flights

12 Oct - 19 Oct	Philippine Airlines
21 Oct - 28 Oct	Asiana Airlines
05 Oct - 28 Oct	Philippine Airlines
03 Oct - 19 Oct	Philippine Airlines
09 Oct - 16 Oct	Delta	direct
13 Oct - 20 Oct	Delta	direct
15 Oct - 22 Oct	Delta	direct
21 Oct - 28 Oct	Delta	direct
06 Oct - 30 Oct	Delta	direct
20 Oct - 11 Nov	Delta	direct
06 Oct - 20 Nov	Delta	direct
20 Oct - 12 Nov	Delta	direct
05 Oct - 13 Oct	Delta	direct
22 Oct - 16 Nov	Delta	direct
13 Oct - 14 Nov	Delta	direct
22 Oct - 07 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 508€

Return flights