AirHint found the following cheapest return flights from Beijing (PEK) to Seattle (SEA) in December 2025 (see full year).
Return flights
| 30 Dec - 06 Jan | Air Canada | ||
| 30 Dec - 06 Jan | Hainan Airlines | direct | |
| 27 Dec - 03 Jan | Japan Airlines | ||
| 31 Dec - 07 Jan | United |
Also check the deals for one-way flights from Beijing to Seattle in December.
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