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

Return flights

01 Dec - 08 Dec	Turkish Airlines
31 Dec - 20 Jan	Turkish Airlines
07 Dec - 15 Dec	Alaska Airlines
31 Dec - 07 Jan	Turkish Airlines
02 Dec - 15 Jan	United
01 Dec - 15 Jan	United
31 Dec - 15 Jan	Turkish Airlines
09 Dec - 19 Jan	Turkish Airlines
11 Dec - 12 Jan	United
12 Dec - 12 Jan	United
16 Dec - 12 Jan	Alaska Airlines
15 Dec - 12 Jan	Frontier Airlines
14 Dec - 28 Dec	Turkish Airlines
21 Dec - 26 Dec	Frontier Airlines
20 Dec - 27 Dec	Etihad Airways

Also check the deals for one-way flights from Washington 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.

Book a cheap hotel in Taipei

Cheap car rent in Taipei

Cheapest return flights from Washington to Taipei in December from $938

Return flights