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

Return flights

01 Dec - 11 Dec	Turkish Airlines
01 Dec - 16 Dec	Turkish Airlines
30 Dec - 06 Jan	Turkish Airlines
26 Dec - 18 Jan	Porter Airlines (Canada) Ltd
16 Dec - 18 Jan	Icelandair
16 Dec - 19 Jan	Icelandair
22 Dec - 08 Jan	Frontier Airlines
22 Dec - 09 Jan	Frontier Airlines
21 Dec - 08 Jan	Aer Lingus
30 Dec - 06 Jan	Air China	direct
21 Dec - 29 Dec	Aer Lingus
26 Dec - 05 Jan	Frontier Airlines
20 Dec - 08 Jan	Frontier Airlines
20 Dec - 27 Dec	Aer Lingus

Also check the deals for one-way flights from Washington to Beijing 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 Washington to Beijing in December from 988€

Return flights