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$78+ 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 7/4. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — ORD
abr. 20 — abr. 271
dom. 4/20
dom. 4/27
1 adult, Economy
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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 abril 15, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$175
(Delta)

One-way from

$78
(Southwest)

Popular in

December

Cheapest in

January

Average price

$388

Good round-trip deal

$415 or less

Good one-way deal

$139 or less
Provider with most accurate pricing for Boise Air Term. Gowen Fld-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-Chicago (CHI) flights.
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From Boise Air Term. Gowen Fld to Illinois
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One-way flight from Boise Air Term. Gowen Fld to Illinois
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Highest demand for flights based on searches. 0% potential increase in price ($3 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Price to beat on a round-trip flight from Boise Air Term. Gowen Fld to Illinois.
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Price to beat on a one-way flight from Boise Air Term. Gowen Fld to Illinois.
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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 abril 15, 2025.

This Delta deal was found by Cheapflights users on 4/13. 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.
mié. 7/210:24 amBOI - MDW
1 stop6h 16mDelta
lun. 7/79:20 amMDW - BOI
1 stop5h 40mDelta
Deal found 4/13$175
This Delta deal was found by Cheapflights users on 4/15. 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.
dom. 5/186:00 amBOI - ORD
1 stop5h 43mDelta
sáb. 5/247:30 amORD - BOI
1 stop5h 24mDelta
Deal found 4/15$175
This United Airlines deal was found by Cheapflights users on 4/15. 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.
sáb. 8/165:00 amBOI - ORD
1 stop5h 25mUnited Airlines
mié. 8/209:01 amORD - BOI
Nonstop3h 54mUnited Airlines
Deal found 4/15$201
This Alaska Airlines deal was found by Cheapflights users on 4/15. 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. 5/137:45 amBOI - ORD
1 stop8h 15mAlaska Airlines
mié. 5/215:58 pmORD - BOI
1 stop6h 47mAlaska Airlines
Deal found 4/15$236
This Expedia deal was found by Cheapflights users on 4/15. 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.
sáb. 5/176:37 amBOI - ORD
1 stop6h 41mMultiple Airlines
jue. 5/226:00 amORD - BOI
1 stop6h 51mMultiple Airlines
Deal found 4/15$241
This Southwest deal was found by Cheapflights users on 4/13. 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.
vie. 7/185:25 pmBOI - MDW
1 stop5h 45mSouthwest
mar. 7/225:15 amMDW - BOI
1 stop5h 20mSouthwest
Deal found 4/13$244
This Hawaiian Airlines deal was found by Cheapflights users on 4/14. 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.
jue. 4/242:41 pmBOI - ORD
1 stop8h 18mHawaiian Airlines
mié. 5/73:44 pmORD - BOI
1 stop7h 55mHawaiian Airlines
Deal found 4/14$266
This American Airlines deal was found by Cheapflights users on 4/13. 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.
vie. 10/171:20 pmBOI - ORD
Nonstop3h 35mAmerican Airlines
mié. 10/229:45 amORD - BOI
Nonstop3h 55mAmerican Airlines
Deal found 4/13$270
This Southwest deal was found by Cheapflights users on 4/15. 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. 5/15:05 amBOI - ORD
1 stop8h 00mSouthwest
jue. 5/82:55 pmORD - BOI
1 stop10h 55mSouthwest
Deal found 4/15$285
This Delta deal was found by Cheapflights users on 4/14. 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.
mié. 6/1811:40 pmBOI - STL
1 stop7h 43mDelta
mar. 6/246:30 amSTL - BOI
1 stop8h 23mDelta
Deal found 4/14$287
This Mytrip deal was found by Cheapflights users on 4/14. 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. 4/281:52 pmBOI - ORD
2 stops38h 53mSpirit Airlines
jue. 5/19:04 pmORD - BOI
2 stops16h 53mSpirit Airlines
Deal found 4/14$326
This Southwest deal was found by Cheapflights users on 4/14. 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.
lun. 5/195:00 pmBOI - STL
1 stop6h 35mSouthwest
dom. 5/256:30 amSTL - BOI
1 stop5h 05mSouthwest
Deal found 4/14$338

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 abril 15, 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 - MDW

BOIMDW

Boise Air Term. Gowen Fld

mié. 7/2

10:24 am-5:40 pm

1 stop6h 16m

Chicago Midway

lun. 7/7

9:20 am-2:00 pm

1 stop5h 40m

$175

BoiseChicago

BOI - ORD

BOIORD

Boise Air Term. Gowen Fld

dom. 5/18

6:00 am-12:43 pm

1 stop5h 43m

Chicago O'Hare Intl

sáb. 5/24

7:30 am-11:54 am

1 stop5h 24m

$175

BoiseChicago

BOI - ORD

BOIORD

Boise Air Term. Gowen Fld

sáb. 8/16

5:00 am-11:25 am

1 stop5h 25m

Chicago O'Hare Intl

mié. 8/20

9:01 am-11:55 am

Nonstop3h 54m

$201

BoiseChicago

BOI - ORD

BOIORD

Boise Air Term. Gowen Fld

mar. 5/13

7:45 am-5:00 pm

1 stop8h 15m

Chicago O'Hare Intl

mié. 5/21

5:58 pm-11:45 pm

1 stop6h 47m

$236

BoiseChicago

BOI - ORD

BOIORD

Boise Air Term. Gowen Fld

sáb. 5/17

6:37 am-2:18 pm

1 stop6h 41m

Chicago O'Hare Intl

jue. 5/22

6:00 am-11:51 am

1 stop6h 51m

$241

BoiseChicago

BOI - MDW

BOIMDW

Boise Air Term. Gowen Fld

vie. 7/18

5:25 pm-12:10 am

1 stop5h 45m

Chicago Midway

mar. 7/22

5:15 am-9:35 am

1 stop5h 20m

$244

BoiseChicago

BOI - ORD

BOIORD

Boise Air Term. Gowen Fld

sáb. 10/11

1:41 pm-12:18 am

1 stop9h 37m

Chicago O'Hare Intl

mié. 10/15

9:45 am-12:40 pm

Nonstop3h 55m

$280

BoiseChicago

BOI - ORD

BOIORD

Boise Air Term. Gowen Fld

jue. 5/1

5:05 am-2:05 pm

1 stop8h 00m

Chicago O'Hare Intl

jue. 5/8

2:55 pm-12:50 am

1 stop10h 55m

$285

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

mié. 6/18

11:40 pm-9:43 am

1 stop9h 03m

Lambert-St Louis

mié. 6/25

7:15 pm-12:14 am

1 stop5h 59m

$287

BoiseChicago

BOI - ORD

BOIORD

Boise Air Term. Gowen Fld

lun. 4/28

1:52 pm-5:45 am

2 stops38h 53m

Chicago O'Hare Intl

jue. 5/1

9:04 pm-12:57 pm

2 stops16h 53m

$326

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/14

Showing 1-10 of 36 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.

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 $321). 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 abril 15, 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.

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 abril 15, 2025.

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 abril 15, 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
9,871 reviews

Crew

8.5

Boarding

8.2

Food

7.1

Entertainment

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Alaska Airlines
8.0
Very good
9,871 reviews
Alaska Airlines
8.0
Very good
9,871 reviews

Crew

8.5

Boarding

8.2

Food

7.1

Entertainment

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Southwest
8.0
Very good
4,279 reviews
Alaska Airlines
8.0
Very good
9,871 reviews

Crew

8.5

Boarding

8.2

Food

7.1

Entertainment

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Delta
8.0
Very good
7,918 reviews
Alaska Airlines
8.0
Very good
9,871 reviews

Crew

8.5

Boarding

8.2

Food

7.1

Entertainment

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Hawaiian Airlines
7.9
Good
2,375 reviews
Alaska Airlines
8.0
Very good
9,871 reviews

Crew

8.5

Boarding

8.2

Food

7.1

Entertainment

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
United Airlines
7.4
Good
8,658 reviews
Alaska Airlines
8.0
Very good
9,871 reviews

Crew

8.5

Boarding

8.2

Food

7.1

Entertainment

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

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 $78 on Southwest. Other airlines that offer cheap prices include United Airlines from $78 and Hawaiian Airlines from $87 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 (95%), SkyWest Airlines (92%) or Air Canada (92%) 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 $844, our data indicates the cheapest price to be $168. The most popular route (Boise Air Term. Gowen Fld - Chicago O'Hare Intl), is priced around $161.

  • 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 $321). 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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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 abril 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$127Average$297FlexibilityNo cancel feeOn-time65%
DeltaCheapest$189Average$343FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$196Average$543FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$217Average$353FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$258Average$416FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$268Average$572FlexibilityNo cancel feeOn-time69%

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