HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Illinois

$84+ Cheap flights from Boise (BOI) to Illinois

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/30. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — ORD
mar. 30 — abr. 61
dom. 3/30
dom. 4/6
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Boise to Illinois with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Boise to Illinois

Keep the following information in mind while searching for Boise to Illinois flight deals. Data was last updated marzo 25, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$189
(Southwest)

One-way from

$84
(Mytrip)

Popular in

December

Cheapest in

January

Average price

$389

Good round-trip deal

$413 or less

Good one-way deal

$189 or less
Provider with most accurate pricing for Boise Air Term. Gowen Fld-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-Chicago (CHI) flights.
Search Deals
From Boise Air Term. Gowen Fld to Illinois
Search Deals
One-way flight from Boise Air Term. Gowen Fld to Illinois
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2025
Search Deals
Price to beat on a round-trip flight from Boise Air Term. Gowen Fld to Illinois.
Search Deals
Price to beat on a one-way flight from Boise Air Term. Gowen Fld to Illinois.
Search Deals

Find flight deals from Boise to Illinois

Cheapest flights from Boise to Illinois
Explore the most affordable flight options available from Boise to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on marzo 25, 2025.

This Southwest deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 4/2311:45 amBOI - ORD
1 stop10h 55mSouthwest
sáb. 4/267:00 amORD - BOI
1 stop10h 10mSouthwest
Deal found 3/24$186
This Southwest deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 5/81:50 pmBOI - MDW
1 stop9h 05mSouthwest
dom. 5/115:45 amMDW - BOI
1 stop5h 25mSouthwest
Deal found 3/24$189
This Delta deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 4/2511:30 pmBOI - MDW
1 stop8h 37mDelta
lun. 4/287:00 pmMDW - BOI
1 stop6h 03mDelta
Deal found 3/24$202
This Delta deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 4/256:15 amBOI - ORD
1 stop5h 33mDelta
lun. 4/282:15 pmORD - BOI
1 stop8h 46mDelta
Deal found 3/24$202
This United Airlines deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/1710:39 amBOI - ORD
1 stop6h 27mUnited Airlines
sáb. 9/209:01 amORD - BOI
Nonstop3h 54mUnited Airlines
Deal found 3/23$208
This American Airlines deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/141:20 pmBOI - ORD
Nonstop3h 35mAmerican Airlines
lun. 8/189:45 amORD - BOI
Nonstop3h 55mAmerican Airlines
Deal found 3/24$224
This Southwest deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 4/236:35 amBOI - STL
1 stop6h 00mSouthwest
mié. 4/305:45 amSTL - BOI
1 stop7h 25mSouthwest
Deal found 3/24$227
This Hawaiian Airlines deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 6/254:00 pmBOI - ORD
1 stop6h 39mHawaiian Airlines
mié. 7/26:00 amORD - BOI
1 stop7h 20mHawaiian Airlines
Deal found 3/24$234
This Alaska Airlines deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 6/104:01 pmBOI - ORD
1 stop6h 55mAlaska Airlines
mar. 6/176:00 amORD - BOI
1 stop10h 04mAlaska Airlines
Deal found 3/23$249
This American Airlines deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 5/241:50 pmBOI - STL
1 stop9h 08mAmerican Airlines
jue. 5/295:19 amSTL - BOI
1 stop8h 26mAmerican Airlines
Deal found 3/23$288
This Mytrip deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 4/211:52 pmBOI - ORD
2 stops14h 53mMultiple Airlines
lun. 4/287:41 amORD - BOI
2 stops15h 04mMultiple Airlines
Deal found 3/24$314
This Delta deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 6/2411:35 pmBOI - STL
1 stop9h 04mDelta
mar. 7/17:15 pmSTL - BOI
1 stop5h 59mDelta
Deal found 3/24$319

Cheapflights Fare Finder

Customize your flight search to find flights from Boise to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated marzo 25, 2025.
Use the filters below to find and compare flights from Boise to Illinois that are best for you.

Fly from

Boise

Fly to

Illinois

Route

Depart

Return

Price

BoiseChicago

BOI - ORD

BOIORD

Boise Air Term. Gowen Fld

mié. 4/23

11:45 am-11:40 pm

1 stop10h 55m

Chicago O'Hare Intl

sáb. 4/26

7:00 am-4:10 pm

1 stop10h 10m

$186

BoiseChicago

BOI - MDW

BOIMDW

Boise Air Term. Gowen Fld

jue. 5/8

1:50 pm-11:55 pm

1 stop9h 05m

Chicago Midway

dom. 5/11

5:45 am-10:10 am

1 stop5h 25m

$189

BoiseChicago

BOI - MDW

BOIMDW

Boise Air Term. Gowen Fld

vie. 4/25

11:30 pm-9:07 am

1 stop8h 37m

Chicago Midway

lun. 4/28

7:00 pm-12:03 am

1 stop6h 03m

$202

BoiseChicago

BOI - ORD

BOIORD

Boise Air Term. Gowen Fld

vie. 4/25

6:15 am-12:48 pm

1 stop5h 33m

Chicago O'Hare Intl

lun. 4/28

2:15 pm-10:01 pm

1 stop8h 46m

$202

BoiseChicago

BOI - ORD

BOIORD

Boise Air Term. Gowen Fld

mié. 4/23

5:25 pm-12:35 am

1 stop6h 10m

Chicago O'Hare Intl

sáb. 4/26

7:35 pm-10:49 pm

Nonstop4h 14m

$223

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

mié. 4/23

6:35 am-1:35 pm

1 stop6h 00m

Lambert-St Louis

mié. 4/30

5:45 am-12:10 pm

1 stop7h 25m

$227

BoiseChicago

BOI - ORD

BOIORD

Boise Air Term. Gowen Fld

lun. 4/7

8:59 pm-5:59 am

1 stop8h 00m

Chicago O'Hare Intl

mié. 4/9

5:53 pm-11:58 pm

1 stop7h 05m

$246

BoiseChicago

BOI - ORD

BOIORD

Boise Air Term. Gowen Fld

mar. 6/10

4:01 pm-11:56 pm

1 stop6h 55m

Chicago O'Hare Intl

mar. 6/17

6:00 am-3:04 pm

1 stop10h 04m

$249

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

sáb. 5/24

1:50 pm-11:58 pm

1 stop9h 08m

Lambert-St Louis

jue. 5/29

5:19 am-12:45 pm

1 stop8h 26m

$288

BoiseChicago

BOI - ORD

BOIORD

Boise Air Term. Gowen Fld

lun. 4/21

1:52 pm-5:45 am

2 stops14h 53m

Chicago O'Hare Intl

lun. 4/28

7:41 am-9:45 pm

2 stops15h 04m

$314

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

Showing 1-10 of 45 results
1
2
3
...
5

Best time to book a flight from Boise to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Boise with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Boise to Illinois

What is the cheapest month to book a flight from Boise to Illinois?

Currently, August is the cheapest month in which you can book a flight from Boise to Illinois (average of $245). Flying from Boise to Illinois in March is currently the most expensive (average of $323). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from BOI to IL?

Find hourly flight availability from Boise to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated marzo 25, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Boise to Illinois as you normally would.

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated marzo 25, 2025.
Read through reviews of airlines operating flights from Boise to Illinois, such as Alaska Airlines, Southwest and Delta. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,782 reviews

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,782 reviews
Alaska Airlines
8.0
Very good
9,782 reviews

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Southwest
8.0
Very good
4,272 reviews
Alaska Airlines
8.0
Very good
9,782 reviews

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,890 reviews
Alaska Airlines
8.0
Very good
9,782 reviews

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Hawaiian Airlines
7.9
Good
2,330 reviews
Alaska Airlines
8.0
Very good
9,782 reviews

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,605 reviews
Alaska Airlines
8.0
Very good
9,782 reviews

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Related info for your journey

Find useful and relevant information for your journey from Boise to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Boise to Illinois?

    If you book a flight to Illinois from Boise, you will be flying from Air Term. Gowen Fld, which is the city’s only airport. Boise Air Term. Gowen Fld (BOI) is located 3.3 mi from the center of Boise.

  • What are the cheapest airlines to fly from Boise to Illinois one-way?

    One-way options have recently been found by users for as low as $84 on Spirit Airlines. Other airlines that offer cheap prices include Southwest from $85 and United Airlines from $85 one-way.

  • What are the most popular routes from Boise to Illinois?

    Most travelers choose Boise Air Term. Gowen Fld - Chicago O'Hare Intl, Boise Air Term. Gowen Fld - Chicago Midway or Boise Air Term. Gowen Fld - Lambert-St Louis when deciding on the best route from Boise to Illinois.

  • What are the most reliable airlines from Boise to Illinois?

    Consider Lufthansa (94%), SkyWest Airlines (94%) or Air Canada (94%) when booking your flight. These represent the most reliable airlines when flying from Boise to Illinois.

  • What are the cheapest flights from Boise to Illinois?

    Looking for the cheapest flight from Boise to Illinois? While on average our users pay $1,541, our data indicates the cheapest price to be $164. The most popular route (Boise Air Term. Gowen Fld - Chicago O'Hare Intl), is priced around $175.

  • Can I find deals for flights from Boise to Illinois that include hotel bookings?

    Yes. In addition to deals on Boise to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Boise to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boise to Illinois.

  • Can I find deals for business class flights from Boise to Illinois?

    Yes. Cheapflights offers flight deals from Boise to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Boise to Illinois?

    Currently, August is the cheapest month in which you can book a flight from Boise to Illinois (average of $245). Flying from Boise to Illinois in March is currently the most expensive (average of $323). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Boise to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
Boise to Las Vegas flights
Boise to Seattle flights
Spokane to Sky Harbor Intl flights
Spokane to Denver flights
Boise to Denver flights
Boise to Sky Harbor Intl flights
Boise to Los Angeles flights
Spokane to Los Angeles flights
Spokane to Dallas/Fort Worth flights
Boise to San Diego flights
Boise to John F Kennedy Intl flights
Spokane to Seattle flights
Idaho Falls to Seattle flights
Spokane to San Diego flights
Spokane to Minneapolis flights
Spokane to Las Vegas flights
Boise to Minneapolis flights
Boise to Dallas/Fort Worth flights
Boise to Atlanta flights
Boise to O'Hare Intl flights
Boise to Orlando flights
Boise to Santa Ana flights
Spokane to O'Hare Intl flights
Spokane to John F Kennedy Intl flights
Boise to Jacksonville flights
Boise to Miami flights
Boise to Newark flights
Boise to San Francisco flights
Spokane to Newark flights
Boise to Austin flights
Spokane to Nashville flights
Spokane to Ontario flights
Boise to Dulles Intl flights
Spokane to Honolulu flights
Boise to Burbank flights
Boise to Honolulu flights
Boise to Sacramento flights
Boise to LaGuardia flights
Boise to Portland flights
Boise to Salt Lake City flights
Spokane to Midway flights
Spokane to Dulles Intl flights
Boise to Harrisburg flights
Boise to Reagan-National flights
Spokane to Orlando flights
Boise to Boston flights
Jackson to Seattle flights
Spokane to LaGuardia flights
Spokane to Santa Ana flights
Boise to Spokane flights

Top 6 airlines flying from Boise to Illinois

Discover the top 6 airlines that operate flights from Boise to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated marzo 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$128Average$261FlexibilityNo cancel feeOn-time65%
DeltaCheapest$185Average$345FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$217Average$353FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$236Average$545FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$258Average$416FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$283Average$579FlexibilityNo cancel feeOn-time69%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.