Cheapest return flights from Boise to Denver in January from 48€

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

Return flights

11 Jan - 18 Jan Frontier Airlines direct
12 Jan - 19 Jan Frontier Airlines direct
09 Jan - 12 Jan Frontier Airlines direct
23 Jan - 27 Jan Frontier Airlines
09 Jan - 16 Jan Frontier Airlines
08 Jan - 15 Jan Alaska Airlines
23 Jan - 27 Jan United direct
14 Jan - 21 Jan Hawaiian Airlines
08 Jan - 15 Jan Southwest Airlines direct
14 Jan - 21 Jan Southwest Airlines direct

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

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