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Boise

$63+ Cheap flights from Illinois to Boise (BOI)

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 1/11. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BOI
Nov 22 — Nov 291
Sat 11/22
Sat 11/29
1 adult, Economy
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Cheap flight deals from Illinois to Boise

Keep the following information in mind while searching for Illinois to Boise flight deals. Data was last updated October 23, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$269
(Delta)

One-way from

$63
(Trip.com)

Popular in

November

Cheapest in

September

Average price

$319

Good round-trip deal

$284 or less

Good one-way deal

$230 or less
Provider with most accurate pricing for Chicago (CHI)-Boise Air Term. Gowen Fld flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Boise Air Term. Gowen Fld flights.
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From Illinois to Boise Air Term. Gowen Fld
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One-way flight from Illinois to Boise Air Term. Gowen Fld
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Highest demand for flights based on searches. 12% potential increase in price ($57 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Price to beat on a round-trip flight from Illinois to Boise Air Term. Gowen Fld.
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Price to beat on a one-way flight from Illinois to Boise Air Term. Gowen Fld.
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Find flight deals from Illinois to Boise

Cheapest flights from Illinois to Boise
Explore the most affordable flight options available from Illinois to Boise. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 23, 2025.

This Delta deal was found by Cheapflights users on 10/22. 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.
Thu 11/209:41 amMDW - BOI
1 stop5h 28mDelta
Thu 11/271:49 pmBOI - MDW
1 stop8h 51mDelta
Deal found 10/22$269
This United Airlines deal was found by Cheapflights users on 10/22. 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 11/88:45 amORD - BOI
Nonstop3h 54mUnited Airlines
Sun 11/1612:45 pmBOI - ORD
Nonstop3h 25mUnited Airlines
Deal found 10/22$269
This Delta deal was found by Cheapflights users on 10/21. 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.
Thu 12/187:20 amORD - BOI
1 stop5h 42mDelta
Tue 12/303:30 pmBOI - ORD
1 stop7h 29mDelta
Deal found 10/21$270
This Alaska Airlines deal was found by Cheapflights users on 10/23. 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.
Fri 11/149:20 amORD - BOI
2 stops15h 34mAlaska Airlines
Sun 11/168:50 pmBOI - ORD
1 stop8h 32mAlaska Airlines
Deal found 10/23$271
This Southwest deal was found by Cheapflights users on 10/21. 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.
Thu 12/183:40 pmMDW - BOI
1 stop10h 05mSouthwest
Sat 1/1011:50 amBOI - MDW
1 stop7h 40mSouthwest
Deal found 10/21$273
This Alaska Airlines deal was found by Cheapflights users on 10/22. 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.
Thu 11/202:54 pmORD - BOI
1 stop9h 55mAlaska Airlines
Thu 11/276:09 amBOI - ORD
1 stop7h 44mAlaska Airlines
Deal found 10/22$273
This Delta deal was found by Cheapflights users on 10/22. 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.
Thu 12/187:20 amORD - BOI
1 stop5h 42mDelta
Fri 1/911:45 amBOI - ORD
2 stops11h 09mDelta
Deal found 10/22$274
This Kiwi.com deal was found by Cheapflights users on 10/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/199:39 amORD - BOI
2 stops27h 20mMultiple Airlines
Sun 1/1112:54 pmBOI - ORD
1 stop28h 59mMultiple Airlines
Deal found 10/21$277
This Kiwi.com deal was found by Cheapflights users on 10/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/197:00 amORD - BOI
1 stop29h 59mFrontier
Fri 1/912:54 pmBOI - ORD
2 stops34h 07mFrontier
Deal found 10/21$278
This Delta deal was found by Cheapflights users on 10/21. 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.
Thu 11/137:20 amORD - BOI
2 stops12h 34mDelta
Sat 11/158:45 amBOI - ORD
2 stops7h 07mDelta
Deal found 10/21$279
This American Airlines deal was found by Cheapflights users on 10/22. 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.
Sat 11/159:55 amORD - BOI
Nonstop4h 11mAmerican Airlines
Mon 11/171:25 pmBOI - ORD
1 stop7h 55mAmerican Airlines
Deal found 10/22$280
This Delta deal was found by Cheapflights users on 10/21. 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.
Thu 12/187:20 amORD - BOI
1 stop5h 42mDelta
Fri 12/263:30 pmBOI - ORD
2 stops16h 55mDelta
Deal found 10/21$281

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Boise 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 October 23, 2025.
Use the filters below to find and compare flights from Illinois to Boise that are best for you.

Fly from

Illinois

Fly to

Boise

Route

Depart

Return

Price

ChicagoBoise

MDW - BOI

MDWBOI

Chicago Midway

Thu 11/20

9:41 am-2:09 pm

1 stop5h 28m

Boise Air Term. Gowen Fld

Thu 11/27

1:49 pm-11:40 pm

1 stop8h 51m

$269

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

Sat 11/8

9:55 am-1:06 pm

Nonstop4h 11m

Boise Air Term. Gowen Fld

Sat 11/15

1:40 pm-6:27 pm

Nonstop3h 47m

$269

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

Sat 11/8

8:45 am-11:39 am

Nonstop3h 54m

Boise Air Term. Gowen Fld

Sun 11/16

12:45 pm-5:10 pm

Nonstop3h 25m

$269

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

Sat 11/15

10:00 am-4:17 pm

1 stop7h 17m

Boise Air Term. Gowen Fld

Sat 11/22

9:42 pm-6:28 am

1 stop7h 46m

$269

ChicagoBoise

MDW - BOI

MDWBOI

Chicago Midway

Thu 11/20

9:41 am-2:09 pm

1 stop5h 28m

Boise Air Term. Gowen Fld

Wed 11/26

1:49 pm-11:40 pm

1 stop8h 51m

$269

ChicagoBoise

MDW - BOI

MDWBOI

Chicago Midway

Thu 2/19

9:20 am-2:09 pm

1 stop5h 49m

Boise Air Term. Gowen Fld

Tue 2/24

5:40 am-1:08 pm

1 stop6h 28m

$269

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

Thu 2/19

7:30 am-6:25 pm

1 stop11h 55m

Boise Air Term. Gowen Fld

Mon 2/23

7:30 pm-9:35 am

2 stops13h 05m

$269

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

Fri 11/21

7:47 am-4:05 pm

1 stop9h 18m

Boise Air Term. Gowen Fld

Sun 11/23

12:50 pm-6:45 pm

1 stop4h 55m

$269

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

Thu 11/20

7:47 am-4:05 pm

1 stop9h 18m

Boise Air Term. Gowen Fld

Wed 11/26

1:49 pm-12:02 am

1 stop9h 13m

$269

ChicagoBoise

MDW - BOI

MDWBOI

Chicago Midway

Thu 12/18

3:40 pm-12:45 am

1 stop10h 05m

Boise Air Term. Gowen Fld

Sat 1/10

11:50 am-8:30 pm

1 stop7h 40m

$273

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/22

Showing 1-10 of 60 results
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Best time to book a flight from Illinois to Boise

Have a flexible travel schedule? Discover the best time to fly to Boise from Illinois 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 Illinois to Boise

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

Currently, July is the cheapest month in which you can book a flight from Illinois to Boise (average of $149). Flying from Illinois to Boise in January is currently the most expensive (average of $271). 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 IL to BOI?

Find hourly flight availability from Illinois to Boise. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 23, 2025.

One of the essential ways to save on airfare from Illinois to Boise is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 17% on airfare.

Related info for your journey

Find useful and relevant information for your journey from Illinois to Boise. 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 into for flights to Boise from Illinois?

    Boise Air Term. Gowen Fld (BOI), located 3.3 mi from the city center, is the airport you fly into when you book flights from Illinois to Boise.

  • How long is the flight from Illinois to Boise?

    Departing from Illinois to Boise will take you 3h 54m. There are 1432 mi between Illinois and Boise. This flight may include one or multiple stops.

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

    $91 is the cheapest one-way deal found within the past few days, from Southwest. You may also be able to find cheap deals on Alaska Airlines and Delta, with prices starting from $94 and $127, respectively.

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

    The most popular route from Illinois to Boise is Chicago O'Hare Intl - Boise Air Term. Gowen Fld. You may also consider Chicago Midway - Boise Air Term. Gowen Fld or Lambert-St Louis - Boise Air Term. Gowen Fld.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Illinois to Boise on time: United Airlines (90%), Air Canada (88%), Lufthansa (83%).

  • What are the cheapest flights from Illinois to Boise?

    While on average a flight from Illinois to Boise is generally $324, our data shows the cheapest flight currently is $170. When looking at the most popular route, (Chicago O'Hare Intl - Boise Air Term. Gowen Fld), you can expect to pay $199 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Illinois to Boise 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 Illinois to Boise?

    Currently, July is the cheapest month in which you can book a flight from Illinois to Boise (average of $149). Flying from Illinois to Boise in January is currently the most expensive (average of $271). 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

Traveling to a place near Boise?

Book flights to Boise if you plan to visit one of these locations
Ontario
Meridian
Nampa
Caldwell
McCall

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Alternative routes for Illinois to Boise

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Top 4 airlines flying from Illinois to Boise

Discover the top 4 airlines that operate flights from Illinois to Boise. 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 October 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$174Average$288FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$237Average$436FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$239Average$348FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$257Average$504FlexibilityNo cancel feeOn-time69%

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