Cheapest return flights from Seattle to Las Vegas in September from $121

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

Return flights

30 Sep - 03 Oct Frontier Airlines
26 Sep - 03 Oct Frontier Airlines
29 Sep - 02 Oct Frontier Airlines
29 Sep - 02 Oct Frontier Airlines direct
25 Sep - 02 Oct Frontier Airlines direct
27 Sep - 04 Oct Frontier Airlines
27 Sep - 30 Sep Frontier Airlines
30 Sep - 03 Oct Alaska Airlines direct
28 Sep - 03 Oct Frontier Airlines
24 Sep - 27 Sep Frontier Airlines
23 Sep - 27 Sep Frontier Airlines
26 Sep - 30 Sep Frontier Airlines
24 Sep - 25 Sep Frontier Airlines
22 Sep - 25 Sep Frontier Airlines
28 Sep - 03 Oct Frontier Airlines direct
26 Sep - 28 Sep Frontier Airlines
24 Sep - 26 Sep Frontier Airlines
26 Sep - 03 Oct Alaska Airlines direct
22 Sep - 26 Sep Frontier Airlines
22 Sep - 24 Sep Frontier Airlines

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

Skyscanner

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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