Cheap flights from Idaho to Denver from $89

The cheapest month to fly to Denver from Idaho is in February. Flight prices, which tend to average around $246, are often lower during this time because this is during the off-season. If you don’t want to visit Denver in February, then you should wait until March to fly from Idaho, when ticket prices are also cheap, with an average price of $265.

The cheapest day to depart on your flight to Denver is on a Thursday when prices can be found for as low as $417. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Denver is Sunday, with ticket prices averaging around $565.

The cheapest time of day to fly to Denver is at noon when flights can be purchased for as low as $409. Flights in the morning are often more expensive with an average ticket price of $501.

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

You are more likely to see cheaper flights to Denver from Idaho when booking weeks ahead of your departure date. In general, you can expect to find flights to Denver for around $295 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Denver from Idaho for as low as $235 on momondo.

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

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

United Airlines, Frontier and Southwest are the top three most popular airlines that fly to Denver from Idaho according to our data. United Airlines is the first choice among our users, with 67% of people opting to fly with this airline when traveling to Denver. Keep in mind that there are 4 different airlines that fly to Denver on a routine basis, so you have a few additional options to choose from.

The number of flights available between Idaho and Denver is 20 per day as of October 2026. The most frequent departure time is 2:00PM, with 50% of daily flights leaving in the afternoon.

146 flights are operational weekly from Idaho to Denver as of October 2026. The most popular departure day for this route is Mon, with 16% of flights per week taking off on this day.