AirHint found the following cheapest one-way flights from Seattle (SEA) to Kuala Lumpur (KUL) in December 2025 (see full year).
One-Way flights
| 04 Dec | Hainan Airlines | ||
| 07 Dec | Lufthansa | ||
| 28 Dec | Hawaiian Airlines | ||
| 18 Dec | Korean Air | ||
| 14 Dec | Delta | ||
| 15 Dec | Delta | ||
| 16 Dec | Delta | ||
| 13 Dec | Delta |
Also check the deals for return flights from Seattle to Kuala Lumpur in December.
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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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