Cheapest one-way flights from Seattle to Denver in May from $32

AirHint found the following cheapest one-way flights from Seattle (SEA) to Denver (DEN) in May 2026 (see full year).

One-Way flights

12 May Frontier Airlines direct
16 May Frontier Airlines direct
18 May Frontier Airlines direct
10 May Frontier Airlines direct
11 May Frontier Airlines direct
03 May Frontier Airlines direct
19 May Frontier Airlines direct
15 May Alaska Airlines direct
23 May Alaska Airlines direct

Also check the deals for return flights from Seattle to Denver in May.

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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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