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

Return flights

01 Dec - 15 Dec	United
05 Dec - 13 Dec	Delta	direct
03 Dec - 05 Dec	Delta	direct
05 Dec - 12 Dec	Delta	direct
08 Dec - 18 Dec	Delta	direct
09 Dec - 16 Dec	ANA
26 Dec - 19 Jan	Delta	direct
09 Dec - 18 Dec	Delta	direct
09 Dec - 16 Dec	Delta	direct
27 Dec - 16 Jan	Delta	direct
26 Dec - 16 Jan	Delta	direct
28 Dec - 16 Jan	Delta	direct
09 Dec - 14 Jan	ANA
08 Dec - 28 Dec	Delta	direct
01 Dec - 15 Dec	China Airlines	direct
15 Dec - 15 Jan	United
15 Dec - 17 Jan	Asiana Airlines
24 Dec - 13 Jan	Korean Air
15 Dec - 15 Jan	Delta	direct
15 Dec - 17 Jan	Delta	direct

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 551€

Return flights