Cheap flights from Colorado to Idaho from $45

In general, December is the cheapest month to fly from Colorado to Idaho. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $25. If you don’t want to visit Idaho in December, then you should wait until February to fly from Colorado, when ticket prices are also cheap, with an average price of $33.

Our data shows that Thursday is the least expensive day to fly to Idaho. Tickets to fly out on this day can be as low as $186. On the other hand, Monday is the most expensive day to depart from Colorado because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $347.

According to our data, the cheapest time of day to fly to Idaho is in the morning. momondo users have found flights departing from Colorado to Idaho in the morning for as low as $224. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. At noon is when there is more demand to fly to Idaho, so prices are often more expensive at around $355 per ticket.

Fly from Denver Intl to Boise Air Term. Gowen Fld for the best Colorado - Idaho flight prices

You are more likely to see cheaper flights to Idaho from Colorado when booking weeks ahead of your departure date. In general, you can expect to find flights to Idaho for around $242 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Idaho from Colorado for as low as $180 on momondo.

There are 4 cabin classes available to choose from on Colorado to Idaho flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Frontier, Southwest, and United Airlines are the most popular carriers operating from Colorado to Idaho

United Airlines, Frontier and Southwest are the top three most popular airlines that fly to Idaho from Colorado according to our data. United Airlines is the first choice among our users, with 56% of people opting to fly with this airline when traveling to Idaho. Keep in mind that there are 5 different airlines that fly to Idaho on a routine basis, so you have a few additional options to choose from.

As of June 2026, 39 flights take off from Colorado and land in Idaho each day. The most common flight departure time for this route is 7:00PM, with 41% of daily flights taking off in the evening.

The number of flights available between Colorado and Idaho is 277 per week as of June 2026. The most frequent departure day is Fri, with 17% of weekly flights leaving on this day.