Cheap flights from Boise to Chicago from $137

The month of February is, on average, the cheapest month to fly to Chicago from Boise, with most prices found around $340. If you’re not able to fly to Chicago in February, then August is your next best option. Flight prices from Boise to Chicago during August average around $385.

The cheapest day to depart on your flight to Chicago is on a Wednesday when prices can be found for as low as $517. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Boise to Chicago for around $748.

Our most recent data shows that the best time of day to fly to Chicago is in the afternoon. Flights from Boise to Chicago during this time can be as low as $435. In contrast, the most expensive time of day to depart to Chicago is in the morning when prices are around $627.

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

You are more likely to see cheaper flights to Chicago from Boise when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago for around $428 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago from Boise for as low as $313 on momondo.

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

You could potentially save up to 10% on your flight if you consider stops on a Boise to Chicago flight.

As of October 2026, prices for Boise to Chicago flights are approximately 42% more expensive when compared to flights at the same time last year.

Alaska Airlines, Frontier, and Southwest are the most popular carriers operating from Boise Air Term. Gowen Fld to Chicago

United Airlines, American Airlines and Delta are the top three most popular airlines that fly to Chicago from Boise according to our data. United Airlines is the first choice among our users, with 46% of people opting to fly with this airline when traveling to Chicago. Keep in mind that there are 5 different airlines that fly to Chicago on a routine basis, so you have a few additional options to choose from.

The number of flights available between Boise and Chicago is 3 per day as of October 2026. The most frequent departure time is 3:00PM, with 80% of daily flights leaving in the afternoon.

As of October 2026, 26 flights take off from Boise and land in Chicago each week. The most common flight departure day for this route is Thu, with 35% of weekly flights taking off on this day.