Cheap flights from Chicago to Boise from $138

The month of February is, on average, the cheapest month to fly to Boise from Chicago, with most prices found around $325. If you aren’t able to travel during the month of February, then book flights to Boise from Chicago during April instead. Flights to Boise in April, while not as cheap as those in February, still average around $361.

Our data shows that Wednesday is the least expensive day to fly to Boise. Tickets to fly out on this day can be as low as $361. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $651. These prices are subject to change though, so be sure to set up a Price Alert for flights to Boise.

Our data shows that the cheapest Chicago to Boise flights are usually those with departure times in the morning. Our users have found flights to Boise in the morning for as low as $407. In the evening is when there is more demand to fly to Boise, so prices are often more expensive at around $570 per ticket.

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

You are more likely to see cheaper flights to Boise from Chicago when booking weeks ahead of your departure date. In general, you can expect to find flights to Boise for around $459 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Boise from Chicago for as low as $336 on momondo.

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

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

American Airlines, United Airlines and Southwest are the top three most popular airlines that fly to Boise 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 Boise. Keep in mind that there are 5 different airlines that fly to Boise on a routine basis, so you have a few additional options to choose from.

Minneapolis (MSP) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

Flights via Minneapolis (MSP) offer the lowest average round-trip price of $404.

Flights connecting via Denver (DEN) have the shortest average one-way travel time: 5h 30m.

Minneapolis (MSP) has the shortest average layover time for this route: 0h 50m.

As of September 2026, there are 7 flights per day flying from Chicago to Boise. The most common time of day flights depart is 7:00PM, with 53% of flights taking off at noon.

As of September 2026, 54 flights take off from Chicago and land in Boise each week. The most common flight departure day for this route is Mon, with 19% of weekly flights taking off on this day.