Cheap flights from Denver to Idaho from $89

In general, February is the cheapest month to fly from Denver to Idaho. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $185. If you don’t want to visit Idaho in February, then you should wait until January to fly from Denver, when ticket prices are also cheap, with an average price of $212.

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 $209. On the other hand, Monday is the most expensive day to depart from Denver because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $362.

According to our data, the cheapest time of day to fly to Idaho is in the morning. momondo users have found flights departing from Denver to Idaho in the morning for as low as $259. 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 $361 per ticket.

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

You are more likely to see cheaper flights to Idaho from Denver when booking weeks ahead of your departure date. In general, you can expect to find flights to Idaho for around $266 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Idaho from Denver for as low as $203 on momondo.

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

Frontier, United Airlines, and Delta are the most popular carriers operating from Denver Intl to Idaho

United Airlines, Frontier and Southwest are the top three most popular airlines that fly to Idaho from Denver according to our data. United Airlines is the first choice among our users, with 59% of people opting to fly with this airline when traveling to Idaho. Keep in mind that there are 4 different airlines that fly to Idaho on a routine basis, so you have a few additional options to choose from.

The number of flights available between Denver and Idaho is 31 per day as of September 2026. The most frequent departure time is 7:00PM, with 38% of daily flights leaving in the evening.

As of September 2026, 218 flights take off from Denver and land in Idaho each week. The most common flight departure day for this route is Thu, with 19% of weekly flights taking off on this day.