Cheap flights from Boise to Illinois from $95
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Boise to Illinois departing on 7/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Boise to Illinois
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
Spirit Airlines flights from Boise to Illinois
Our best Spirit Airlines deals on Boise to Illinois flight tickets
Alaska Airlines flights from Boise to Illinois
Our best Alaska Airlines deals on Boise to Illinois flight tickets
See travel insights to Illinois from
How to get the cheapest flight ticket from Boise to Illinois
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Illinois?
The cheapest month to fly to Illinois from Boise is in January. Flight prices, which tend to average around $320, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of January, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $323.
What is the cheapest day to depart on your flight to Illinois?
The cheapest day to depart from Boise to Illinois is on a Saturday when prices can be found for as low as $605. Flights from Boise to Illinois on a Sunday will generally be more expensive and average around $953. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.
What is the cheapest time of day to depart on your flight to Illinois?
Our most recent data shows that the best time of day to fly to Illinois is in the evening. Flights from Boise to Illinois during this time can be as low as $306. Flights in the morning are often more expensive with an average ticket price of $776.
What is the cheapest Boise Air Term. Gowen Fld to Illinois flight route?
Fly from Boise Air Term. Gowen Fld to Chicago Midway for the best Boise Air Term. Gowen Fld - Illinois flight prices
How far in advance should I book a flight to Illinois?
You are more likely to see cheaper flights to Illinois from Boise when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $399 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Boise for as low as $251 on momondo.
What cabin class options are available on Boise Air Term. Gowen Fld to Illinois flights?
There are 4 cabin classes available to choose from on Boise Air Term. Gowen Fld to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Boise Air Term. Gowen Fld to Illinois?
Spirit Airlines, Frontier, and Hawaiian Airlines are the most popular carriers operating from Boise Air Term. Gowen Fld to Illinois
What airlines fly to Illinois?
United Airlines, Delta and American Airlines are the top three most popular airlines that fly to Illinois 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 Illinois. Keep in mind that there are 5 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.
How many flights depart from Boise to Illinois on average per day?
9 flights are operational daily from Boise to Illinois as of June 2025. The most popular departure time for this route is 12:00PM, with 69% of flights per day taking off in the afternoon.
How many flights depart from Boise to Illinois on average per week?
As of June 2025, 65 flights take off from Boise and land in Illinois each week. The most common flight departure day for this route is Mon, with 15% of weekly flights taking off on this day.
Cheap Boise to Illinois flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Boise to Illinois
When did momondo last update prices for flights from Boise Air Term. Gowen Fld Airport to Illinois?
Prices for flights from Boise Air Term. Gowen Fld Airport to Illinois were last updated today.
How many operators does momondo search for flights from Boise Air Term. Gowen Fld Airport to Illinois?
As of June 2025, there are 5 operators available to choose from for flights from Boise Air Term. Gowen Fld Airport to Illinois.
How old do you have to be to fly from Boise Air Term. Gowen Fld Airport to Illinois?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Boise Air Term. Gowen Fld Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Boise to Illinois?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Boise to Illinois is Embraer 175 (Enhanced Winglets) (32.43% of total bookings). The next most popular plane models are Embraer 175 (22.75%), Airbus A319 (19.14%), and Airbus A320-100/200 (8.33%).
Best airlines flying from Boise to Illinois
Compare and see reviews for airlines that fly from Boise to Illinois with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $139 | Free Cancellation | Rating 8.0 7,964 reviews | |||
| PriceFrom $217 | Free Cancellation | Rating 8.0 10,000 reviews | |||
| PriceFrom $228 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $248 | Free Cancellation | Rating 7.4 8,810 reviews | |||
| PriceFrom $258 | Free Cancellation | Rating 8.0 4,280 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Boise to Illinois?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Boise to Illinois. Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from Boise to Illinois with flexible booking policies on momondo?
Flights from Boise to Illinois with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from Boise to Illinois?
Once all potential Boise to Illinois flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from Boise to Illinois right now. Can momondo alert me if prices change?
Yes. momondo can track prices for Boise to Illinois flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.