Cheapest one-way flights from Seattle (SEA) to Denver (DEN), July

Select a price to book. see full year.

Dates, airline, and price
Dates Airline Price
23 Jul Frontier Airlines
Direct Flight
28 Jul Frontier Airlines
Direct Flight
24 Jul Frontier Airlines
Direct Flight
30 Jul Frontier Airlines
Direct Flight
20 Jul Frontier Airlines
Direct Flight
17 Jul Frontier Airlines
Direct Flight
15 Jul Frontier Airlines
Direct Flight
16 Jul Frontier Airlines
Direct Flight
19 Jul Frontier Airlines
Direct Flight
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deals for return flights from Seattle to Denver in July.

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Updated Jul 14, 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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