Cheapest one-way flights from Seattle to Denver in April from $17

Best time to book flights for Seattle (SEA) to Denver (DEN) flights at AirHint

AirHint found the following cheapest one-way flights from Seattle (SEA) to Denver (DEN) in April 2025 (see full year).

One-Way flights

23 Apr Frontier Airlines direct
11 Apr Frontier Airlines direct
28 Apr Frontier Airlines direct
30 Apr Frontier Airlines direct
12 Apr Frontier Airlines direct
18 Apr Frontier Airlines direct
10 Apr Frontier Airlines direct
21 Apr Frontier Airlines direct
01 Apr Delta direct
04 Apr Frontier Airlines direct

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

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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