AirHint found the following cheapest one-way flights from Seattle (SEA) to Zurich (ZRH) in December 2025 (see full year).
One-Way flights
| 11 Dec | WestJet | ||
| 28 Dec | Lufthansa | ||
| 27 Dec | Alaska Airlines | ||
| 17 Dec | Delta | ||
| 22 Dec | United | ||
| 18 Dec | Alaska Airlines | ||
| 23 Dec | Lufthansa |
Also check the deals for return flights from Seattle to Zurich in December.
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