Cheapest return flights from Seattle to Las Vegas in December from $108

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

Return flights

12 Dec - 15 Dec Frontier Airlines direct
05 Dec - 08 Dec Frontier Airlines direct
02 Dec - 11 Dec Alaska Airlines direct
02 Dec - 05 Dec Alaska Airlines direct
05 Dec - 07 Dec Frontier Airlines direct
06 Dec - 10 Dec Delta direct
02 Dec - 09 Dec Alaska Airlines direct
30 Dec - 06 Jan Alaska Airlines direct
03 Dec - 09 Dec Delta direct
17 Dec - 19 Dec Delta direct
15 Dec - 22 Dec Delta direct
24 Dec - 01 Jan Alaska Airlines direct
29 Dec - 02 Jan Delta direct
31 Dec - 04 Jan Southwest Airlines direct
24 Dec - 02 Jan Delta direct
19 Dec - 02 Jan Frontier Airlines direct

Also check the deals for one-way 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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