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

Return flights

05 Dec - 14 Dec	Delta	direct
04 Dec - 17 Dec	Delta	direct
08 Dec - 22 Dec	Delta	direct
08 Dec - 21 Dec	Delta	direct
07 Dec - 21 Dec	Delta	direct
07 Dec - 18 Dec	Delta	direct
06 Dec - 18 Dec	Delta	direct
06 Dec - 15 Dec	Delta	direct
06 Dec - 21 Dec	Delta	direct
06 Dec - 22 Dec	Delta	direct
27 Dec - 16 Jan	Delta	direct
28 Dec - 16 Jan	Delta	direct
26 Dec - 19 Jan	Delta	direct
26 Dec - 16 Jan	Delta	direct
26 Dec - 13 Jan	Delta	direct
24 Dec - 11 Jan	Frontier Airlines
26 Dec - 09 Jan	Alaska Airlines
01 Dec - 05 Jan	ANA
17 Dec - 18 Jan	United
14 Dec - 06 Jan	Hawaiian Airlines

Also check the deals for one-way flights from Seattle to Taipei in December.

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 December from 547€

Return flights