Cheap flights from Chicago to Idaho from $136

In general, February is the cheapest month to fly from Chicago to Idaho. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $327. If you don’t want to visit Idaho in February, then you should wait until April to fly from Chicago, when ticket prices are also cheap, with an average price of $361.

Our data shows that Wednesday is the least expensive day to fly to Idaho. Tickets to fly out on this day can be as low as $374. On the other hand, Sunday is the most expensive day to depart from Chicago because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $664.

According to our data, the cheapest time of day to fly to Idaho is in the morning. momondo users have found flights departing from Chicago to Idaho in the morning for as low as $415. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In the evening is when there is more demand to fly to Idaho, so prices are often more expensive at around $560 per ticket.

Fly from Chicago O'Hare Intl to Boise Air Term. Gowen Fld for the best Chicago - Idaho flight prices

You are more likely to see cheaper flights to Idaho from Chicago when booking weeks ahead of your departure date. In general, you can expect to find flights to Idaho for around $470 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Idaho from Chicago for as low as $336 on momondo.

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

Alaska Airlines, United Airlines, and Frontier are the most popular carriers operating from Chicago to Idaho

American Airlines, United Airlines and Southwest are the top three most popular airlines that fly to Idaho from Chicago according to our data. American Airlines is the first choice among our users, with 52% 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 November 2026, there are 7 flights per day flying from Chicago to Idaho. The most common time of day flights depart is 7:00PM, with 62% of flights taking off at noon.

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