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$114+ 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 1/22. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — ORD
Nov 26 — Dec 31
Tue 11/26
Tue 12/3
1 adult, Economy
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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 November 21, 2024.

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 November 21, 2024.

This Delta deal was found by Cheapflights users on 11/20. 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.
Fri 12/611:10 amBOI - ORD
1 stop5h 52mDelta
Tue 12/177:10 pmORD - BOI
1 stop6h 33mDelta
Deal found 11/20$248
This Mytrip deal was found by Cheapflights users on 11/20. 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.
Fri 12/1311:57 amBOI - ORD
2 stops20h 41mSpirit Airlines
Sun 12/159:53 pmORD - BOI
1 stop14h 05mSpirit Airlines
Deal found 11/20$260
This United Airlines deal was found by Cheapflights users on 11/19. 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.
Tue 12/315:20 pmBOI - ORD
1 stop5h 31mUnited Airlines
Mon 1/64:00 pmORD - BOI
1 stop6h 33mUnited Airlines
Deal found 11/19$268
This Mytrip deal was found by Cheapflights users on 11/20. 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.
Mon 12/27:49 pmBOI - ORD
2 stops26h 49mMultiple Airlines
Thu 12/56:33 pmORD - BOI
2 stops17h 25mMultiple Airlines
Deal found 11/20$292
This Delta deal was found by Cheapflights users on 11/20. 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.
Wed 12/112:00 pmBOI - STL
2 stops9h 57mDelta
Sat 12/147:20 amSTL - BOI
1 stop5h 50mDelta
Deal found 11/20$325
This Delta deal was found by Cheapflights users on 11/20. 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.
Sat 12/141:53 pmBOI - MDW
1 stop7h 13mDelta
Mon 12/169:38 amMDW - BOI
1 stop5h 53mDelta
Deal found 11/20$333
This Southwest deal was found by Cheapflights users on 11/19. 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.
Tue 12/311:00 pmBOI - ORD
2 stops8h 35mSouthwest
Mon 1/64:00 pmORD - BOI
1 stop7h 55mSouthwest
Deal found 11/19$333
This American Airlines deal was found by Cheapflights users on 11/19. 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 12/112:16 pmBOI - STL
1 stop8h 38mAmerican Airlines
Sat 12/147:20 amSTL - BOI
1 stop7h 11mAmerican Airlines
Deal found 11/19$358
This Southwest deal was found by Cheapflights users on 11/20. 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.
Tue 12/312:55 pmBOI - MDW
1 stop5h 55mSouthwest
Mon 1/64:20 pmMDW - BOI
1 stop7h 40mSouthwest
Deal found 11/20$383
This United Airlines deal was found by Cheapflights users on 11/19. 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.
Sun 12/156:40 amBOI - STL
1 stop5h 03mUnited Airlines
Tue 12/311:44 pmSTL - BOI
1 stop7h 24mUnited Airlines
Deal found 11/19$391
This American Airlines deal was found by Cheapflights users on 11/20. 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.
Fri 12/61:29 pmBOI - ORD
1 stop9h 28mAmerican Airlines
Sun 12/86:00 amORD - BOI
1 stop8h 31mAmerican Airlines
Deal found 11/20$400
This Southwest deal was found by Cheapflights users on 11/19. 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 12/154:55 pmBOI - STL
1 stop6h 30mSouthwest
Tue 12/312:40 pmSTL - BOI
2 stops9h 20mSouthwest
Deal found 11/19$425

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 2,629,791 searches. Data last updated November 21, 2024.

Fly from

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Fly to

Any airport

Route

Depart

Return

Price

BoiseChicago

BOI - ORD

BOIORD

Boise Air Term. Gowen Fld

Fri 12/6

11:10 am-6:02 pm

1 stop5h 52m

Chicago O'Hare Intl

Tue 12/17

7:10 pm-12:43 am

1 stop6h 33m

$248

BoiseChicago

BOI - ORD

BOIORD

Boise Air Term. Gowen Fld

Fri 12/13

11:57 am-9:38 am

2 stops20h 41m

Chicago O'Hare Intl

Sun 12/15

9:53 pm-10:58 am

1 stop14h 05m

$260

BoiseChicago

BOI - ORD

BOIORD

Boise Air Term. Gowen Fld

Thu 2/27

8:59 pm-5:53 am

1 stop7h 54m

Chicago O'Hare Intl

Sun 3/2

7:00 pm-1:03 pm

1 stop19h 03m

$265

BoiseChicago

BOI - ORD

BOIORD

Boise Air Term. Gowen Fld

Tue 12/31

5:20 pm-11:51 pm

1 stop5h 31m

Chicago O'Hare Intl

Mon 1/6

4:00 pm-9:33 pm

1 stop6h 33m

$268

BoiseChicago

BOI - ORD

BOIORD

Boise Air Term. Gowen Fld

Mon 12/2

7:49 pm-11:38 pm

2 stops26h 49m

Chicago O'Hare Intl

Thu 12/5

6:33 pm-10:58 am

2 stops17h 25m

$292

BoiseChicago

BOI - MDW

BOIMDW

Boise Air Term. Gowen Fld

Fri 1/10

5:30 am-12:46 pm

1 stop6h 16m

Chicago Midway

Sun 1/12

6:59 pm-11:58 pm

1 stop5h 59m

$303

BoiseChicago

BOI - ORD

BOIORD

Boise Air Term. Gowen Fld

Fri 1/10

11:50 am-10:20 pm

2 stops9h 30m

Chicago O'Hare Intl

Sun 1/12

5:45 am-12:00 pm

1 stop7h 15m

$313

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Wed 12/11

2:00 pm-12:57 am

2 stops9h 57m

Lambert-St Louis

Sat 12/14

7:20 am-12:10 pm

1 stop5h 50m

$325

BoiseChicago

BOI - MDW

BOIMDW

Boise Air Term. Gowen Fld

Thu 2/27

7:05 pm-9:40 am

2 stops13h 35m

Chicago Midway

Sun 3/2

5:20 am-10:25 am

1 stop6h 05m

$332

BoisePeoria

BOI - PIA

BOIPIA

Boise Air Term. Gowen Fld

Wed 1/22

7:15 pm-10:19 am

2 stops14h 04m

Greater Peoria

Thu 1/30

10:54 am-10:15 pm

2 stops12h 21m

$333

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/20

Showing 1-10 of 40 results
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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 November 21, 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.

Weekly flight availability from Boise to Illinois

Explore weekly flight availability from Boise to Illinois. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated November 21, 2024.

The most flights from BOI to USIL are scheduled on a Monday (7 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (7 on average).

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 November 21, 2024.
Read through reviews of airlines operating flights from Boise to Illinois, such as Delta, Alaska Airlines and United Airlines. 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
5,015 reviews

Boarding

8.2

Comfort

8.1

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Southwest
8.1
Very good
5,015 reviews
Southwest
8.1
Very good
5,015 reviews

Boarding

8.2

Comfort

8.1

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Alaska Airlines
8.0
Very good
9,458 reviews
Southwest
8.1
Very good
5,015 reviews

Boarding

8.2

Comfort

8.1

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Delta
8.0
Very good
8,759 reviews
Southwest
8.1
Very good
5,015 reviews

Boarding

8.2

Comfort

8.1

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

United Airlines
7.4
Good
9,173 reviews
Southwest
8.1
Very good
5,015 reviews

Boarding

8.2

Comfort

8.1

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Allegiant Air
7.4
Good
850 reviews
Southwest
8.1
Very good
5,015 reviews

Boarding

8.2

Comfort

8.1

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

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 $114 on Delta. Other airlines that offer cheap prices include Southwest from $165 and Spirit Airlines from $166 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 (85%), Emirates (85%) or Lufthansa (85%) 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 $1,081, our data indicates the cheapest price to be $213. The most popular route (Boise Air Term. Gowen Fld - Chicago O'Hare Intl), is priced around $173.

  • 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.

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Alternative routes for Boise to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Idaho Falls to Sky Harbor Intl 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 2,629,791 searches. Data last updated November 21, 2024.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$114Average$208FlexibilityNo cancel feeOn-time65%
DeltaCheapest$185Average$346FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$215Average$338FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$228Average$544FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$291Average$581FlexibilityNo cancel feeOn-time69%
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