Cheapest return flights from Las Vegas to Seattle in December from $275

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

Return flights

25 Dec - 29 Dec Frontier Airlines
26 Dec - 29 Dec Frontier Airlines direct
31 Dec - 05 Jan Frontier Airlines direct
31 Dec - 01 Jan Frontier Airlines
26 Dec - 26 Dec Frontier Airlines direct
28 Dec - 04 Jan Frontier Airlines direct
31 Dec - 04 Jan Frontier Airlines
30 Dec - 03 Jan Frontier Airlines direct
26 Dec - 28 Dec Frontier Airlines direct
31 Dec - 04 Jan Frontier Airlines direct
28 Dec - 31 Dec Frontier Airlines
27 Dec - 29 Dec Frontier Airlines
25 Dec - 29 Dec Alaska Airlines direct
28 Dec - 28 Dec Frontier Airlines direct
27 Dec - 27 Dec Frontier Airlines
29 Dec - 29 Dec Frontier Airlines direct
31 Dec - 01 Jan Frontier Airlines direct

Also check the deals for one-way flights from Las Vegas to Seattle in December.

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