Cheapest return flights from Boise to Denver in January from $66

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

Return flights

30 Jan - 02 Feb Frontier Airlines direct
15 Jan - 17 Jan Frontier Airlines
17 Jan - 20 Jan Delta
22 Jan - 26 Jan Alaska Airlines
22 Jan - 26 Jan United direct
29 Jan - 02 Feb Southwest Airlines direct
15 Jan - 17 Jan United direct
17 Jan - 20 Jan United direct
02 Jan - 04 Jan United direct

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

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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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