HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Illinois

$95+ 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 2/2. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — ORD
Dec 23 — Dec 301
Mon 12/23
Mon 12/30
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

Discover tips and strategies to find the most affordable flight options for your journey from Boise (BOI) to Illinois (USIL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 18, 2024.

Round-trip from

$228
(Delta)

One-way from

$95
(FlightHub)
From Boise Air Term. Gowen Fld to Illinois
Search Deals
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 December 18, 2024.

This Delta deal was found by Cheapflights users on 12/17. 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.
Sun 12/225:32 amBOI - ORD
1 stop5h 20mDelta
Wed 12/254:00 pmORD - BOI
1 stop8h 10mDelta
Deal found 12/17$468
This Expedia deal was found by Cheapflights users on 12/16. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/276:00 amBOI - ORD
1 stop9h 50mMultiple Airlines
Sun 12/299:54 pmORD - BOI
1 stop14h 08mMultiple Airlines
Deal found 12/16$503
This United Airlines deal was found by Cheapflights users on 12/17. 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.
Mon 12/2312:14 pmBOI - ORD
Nonstop3h 45mUnited Airlines
Wed 12/257:35 pmORD - BOI
Nonstop4h 14mUnited Airlines
Deal found 12/17$531
This Southwest deal was found by Cheapflights users on 12/16. 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.
Fri 12/204:50 pmBOI - MDW
1 stop7h 50mSouthwest
Sun 12/229:30 amMDW - BOI
1 stop9h 50mSouthwest
Deal found 12/16$598
This American Airlines deal was found by Cheapflights users on 12/17. 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.
Wed 12/182:16 pmBOI - ORD
1 stop9h 24mAmerican Airlines
Thu 12/265:10 pmORD - BOI
1 stop7h 29mAmerican Airlines
Deal found 12/17$633
This Delta deal was found by Cheapflights users on 12/17. 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.
Sun 12/225:32 amBOI - MDW
2 stops9h 52mDelta
Wed 12/256:00 amMDW - BOI
1 stop8h 14mDelta
Deal found 12/17$673
This Delta deal was found by Cheapflights users on 12/17. 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.
Sun 12/292:10 pmBOI - STL
1 stop6h 56mDelta
Fri 1/36:04 amSTL - BOI
1 stop8h 36mDelta
Deal found 12/17$681
This Southwest deal was found by Cheapflights users on 12/17. 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.
Sun 12/2910:55 amBOI - STL
1 stop6h 10mSouthwest
Fri 1/34:15 pmSTL - BOI
2 stops9h 40mSouthwest
Deal found 12/17$686
This Alaska Airlines deal was found by Cheapflights users on 12/18. 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.
Wed 12/258:05 amBOI - ORD
1 stop9h 05mAlaska Airlines
Thu 12/267:00 amORD - BOI
1 stop9h 01mAlaska Airlines
Deal found 12/18$687
This Southwest deal was found by Cheapflights users on 12/17. 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.
Mon 12/236:05 amBOI - ORD
1 stop8h 15mSouthwest
Fri 12/277:00 amORD - BOI
1 stop10h 05mSouthwest
Deal found 12/17$693
This CheapOair deal was found by Cheapflights users on 12/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2711:57 amBOI - ORD
1 stop16h 33mSpirit Airlines
Wed 1/19:54 pmORD - BOI
1 stop14h 08mSpirit Airlines
Deal found 12/17$748
This United Airlines deal was found by Cheapflights users on 12/17. 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.
Sat 12/218:30 amBOI - PIA
1 stop7h 53mUnited Airlines
Wed 1/16:30 amPIA - BOI
1 stop6h 47mUnited Airlines
Deal found 12/17$757

Find flights from Boise to Illinois within your budget

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 December 18, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

BoiseChicago

BOI - MDW

BOIMDW

Boise Air Term. Gowen Fld

Wed 1/22

5:30 am-12:46 pm

1 stop6h 16m

Chicago Midway

Sat 1/25

6:59 pm-11:58 pm

1 stop5h 59m

$228

BoiseChicago

BOI - ORD

BOIORD

Boise Air Term. Gowen Fld

Thu 2/20

11:25 am-6:23 pm

1 stop5h 58m

Chicago O'Hare Intl

Sun 2/23

7:00 am-4:16 pm

1 stop10h 16m

$228

BoiseChicago

BOI - ORD

BOIORD

Boise Air Term. Gowen Fld

Fri 2/21

7:17 pm-6:07 am

1 stop9h 50m

Chicago O'Hare Intl

Mon 2/24

12:48 pm-6:18 pm

3 stops30h 30m

$282

BoiseChicago

BOI - ORD

BOIORD

Boise Air Term. Gowen Fld

Mon 2/17

7:17 pm-6:07 am

1 stop9h 50m

Chicago O'Hare Intl

Fri 2/21

5:54 pm-11:59 pm

1 stop7h 05m

$293

BoiseChicago

BOI - ORD

BOIORD

Boise Air Term. Gowen Fld

Wed 5/21

8:30 pm-5:04 am

1 stop7h 34m

Chicago O'Hare Intl

Wed 6/11

7:00 am-7:10 pm

2 stops13h 10m

$306

BoiseMoline

BOI - MLI

BOIMLI

Boise Air Term. Gowen Fld

Thu 1/23

1:28 pm-9:29 pm

1 stop7h 01m

Moline Quad-City

Sun 1/26

3:28 pm-9:52 pm

1 stop7h 24m

$318

BoiseChicago

BOI - ORD

BOIORD

Boise Air Term. Gowen Fld

Fri 1/24

2:32 pm-11:59 pm

1 stop8h 27m

Chicago O'Hare Intl

Wed 1/29

9:00 am-12:20 pm

Nonstop4h 20m

$323

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Thu 1/16

2:32 pm-8:43 pm

1 stop5h 11m

Lambert-St Louis

Wed 1/22

7:00 am-4:27 pm

1 stop10h 27m

$325

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Thu 1/16

9:25 am-9:33 pm

2 stops11h 08m

Lambert-St Louis

Wed 1/22

5:36 pm-11:58 pm

1 stop7h 22m

$327

BoiseChicago

BOI - MDW

BOIMDW

Boise Air Term. Gowen Fld

Fri 2/21

7:05 pm-10:30 am

2 stops14h 25m

Chicago Midway

Mon 2/24

9:40 am-6:20 pm

1 stop9h 40m

$333

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 30 results
1
2
3

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.

Travel insights for flights from Boise to Illinois

Get recent, data-driven insights about flights from Boise to Illinois including ideal travel times, pricing trends, and more.

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

Currently, September is the cheapest month in which you can book a flight from Boise to Illinois (average of $232). Flying from Boise to Illinois in June is currently the most expensive (average of $308). 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 December 18, 2024.

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 December 18, 2024.
Read through reviews of airlines operating flights from Boise to Illinois, such as American Airlines, Spirit Airlines and Southwest. 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.
Southwest
8.1
Very good
4,848 reviews

Food

7.2

Entertainment

7.7

Crew

8.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,848 reviews
Southwest
8.1
Very good
4,848 reviews

Food

7.2

Entertainment

7.7

Crew

8.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Alaska Airlines
8.0
Very good
9,552 reviews
Southwest
8.1
Very good
4,848 reviews

Food

7.2

Entertainment

7.7

Crew

8.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,604 reviews
Southwest
8.1
Very good
4,848 reviews

Food

7.2

Entertainment

7.7

Crew

8.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
9,059 reviews
Southwest
8.1
Very good
4,848 reviews

Food

7.2

Entertainment

7.7

Crew

8.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,848 reviews

Food

7.2

Entertainment

7.7

Crew

8.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

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 $95 on Spirit Airlines. Other airlines that offer cheap prices include Delta from $100 and Southwest from $160 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 Air Canada (83%), Emirates (83%) or Lufthansa (83%) 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 $1,095, our data indicates the cheapest price to be $253. The most popular route (Boise Air Term. Gowen Fld - Chicago O'Hare Intl), is priced around $188.

  • 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, September is the cheapest month in which you can book a flight from Boise to Illinois (average of $232). Flying from Boise to Illinois in June is currently the most expensive (average of $308). 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 Sky Harbor Intl flights
Boise to Seattle flights
Boise to Los Angeles flights
Spokane to Seattle flights
Boise to Las Vegas flights
Boise to Dallas/Fort Worth flights
Spokane to Los Angeles flights
Spokane to Sky Harbor Intl flights
Boise to O'Hare Intl flights
Spokane to Las Vegas flights
Boise to Atlanta flights
Boise to Orlando flights
Spokane to Dallas/Fort Worth flights
Spokane to San Diego flights
Boise to San Francisco flights
Spokane to Denver flights
Spokane to Minneapolis flights
Boise to Ontario flights
Boise to San Diego flights
Spokane to Kahului flights
Boise to John F Kennedy Intl flights
Boise to Fort Lauderdale flights
Boise to Miami flights
Boise to Denver flights
Spokane to Hobby flights
Boise to Honolulu flights
Spokane to Atlanta flights
Boise to Salt Lake City flights
Spokane to Tampa flights
Spokane to Salt Lake City flights
Spokane to San Jose flights
Boise to Hobby flights
Spokane to Orlando flights
Spokane to Honolulu flights
Boise to Kahului flights
Spokane to Ontario flights
Spokane to Dulles Intl flights
Boise to Santa Ana flights
Boise to Portland flights
Boise to Burbank flights
Spokane to O'Hare Intl flights
Boise to Lihue flights
Spokane to George Bush Intcntl flights
Boise to Austin flights
Boise to George Bush Intcntl flights
Boise to Love Field flights
Spokane to Baltimore flights
Spokane to John F Kennedy Intl flights
Spokane to Portland flights
Spokane to Palm Springs flights

Top 5 airlines flying from Boise to Illinois

Discover the top 5 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 December 18, 2024.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$114Average$208FlexibilityNo cancel feeOn-time65%
DeltaCheapest$185Average$355FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$215Average$368FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$228Average$545FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$293Average$584FlexibilityNo 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.