Cheapest one-way flights from Seattle to Las Vegas in December from $29

AirHint found the following cheapest one-way flights from Seattle (SEA) to Las Vegas (LAS) in December 2025 (see full year).

One-Way flights

31 Dec Frontier Airlines direct
01 Dec Frontier Airlines direct
28 Dec Frontier Airlines direct
15 Dec Frontier Airlines direct
30 Dec Frontier Airlines direct
16 Dec Alaska Airlines direct
03 Dec Alaska Airlines direct
06 Dec Alaska Airlines direct
02 Dec Alaska Airlines direct
17 Dec Alaska Airlines direct

Also check the deals for return flights from Seattle to Las Vegas 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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