AirHint found the following cheapest one-way flights from Seattle (SEA) to Warsaw (WAW) in January 2026 (see full year).
One-Way flights
| 17 Jan | WestJet | ||
| 18 Jan | WestJet | ||
| 14 Jan | Alaska Airlines | ||
| 15 Jan | Alaska Airlines | ||
| 16 Jan | Alaska Airlines | ||
| 13 Jan | Hawaiian Airlines |
Also check the deals for return flights from Seattle to Warsaw in January.
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