Cheapest return flights from Seattle to Denver in January from $166

AirHint found the following cheapest return flights from Seattle (SEA) to Denver (DEN) in January 2026 (see full year).

Return flights

29 Jan - 04 Feb Frontier Airlines direct
29 Jan - 03 Feb Frontier Airlines direct
29 Jan - 01 Feb Frontier Airlines direct

Also check the deals for one-way flights from Seattle to Denver in January.

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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