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

One-Way flights

10 Oct	Philippine Airlines
01 Oct	Hawaiian Airlines
17 Oct	EVA Air
15 Oct	Delta	direct
08 Oct	Delta	direct
05 Oct	Delta	direct
03 Oct	Delta	direct
04 Oct	Delta	direct
12 Oct	Delta	direct
16 Oct	Delta	direct

Also check the deals for return flights from Taipei 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 Taipei to Seattle in October from $433

One-Way flights