Cheapest one-way flights from Seattle to Salt Lake City in September from $75

AirHint found the following cheapest one-way flights from Seattle (SEA) to Salt Lake City (SLC) in September 2025 (see full year).

One-Way flights

17 Sep Alaska Airlines direct
30 Sep Frontier Airlines
16 Sep Alaska Airlines direct
16 Sep Frontier Airlines
22 Sep Frontier Airlines
15 Sep Frontier Airlines
11 Sep Frontier Airlines
24 Sep Frontier Airlines
19 Sep Alaska Airlines direct
09 Sep Alaska Airlines direct

Also check the deals for return flights from Seattle to Salt Lake City 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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