Cheapest one-way flights from Seattle (SEA) to Los Angeles (LAX), September

Select a price to book. see full year.

Dates, airline, and price
Dates Airline Price
16 Sep Frontier Airlines
Direct Flight
19 Sep Frontier Airlines
Direct Flight
26 Sep Frontier Airlines
Direct Flight
30 Sep Frontier Airlines
Direct Flight
22 Sep Frontier Airlines
Direct Flight
17 Sep Frontier Airlines
Direct Flight
15 Sep Frontier Airlines
Direct Flight
25 Sep Frontier Airlines
Direct Flight
21 Sep Frontier Airlines
23 Sep Frontier Airlines
Direct Flight
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deals for return flights from Seattle to Los Angeles in September.

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Updated Aug 25, 2026.

About these fares

These results come from our latest search across airlines for your currency. Prices change quickly and are not locked until you complete booking—always confirm the total and fare rules on the partner site.

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