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$88+ 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
ene. 11 — ene. 181
dom. 1/11
dom. 1/18
1 adult, Economy
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Cheap 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 diciembre 12, 2025.

This Delta deal was found by Cheapflights users on 12/10. 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.
jue. 12/256:00 amORD - BOI
1 stop9h 49mDelta
mar. 1/65:40 amBOI - ORD
1 stop6h 42mDelta
Deal found 12/10$272
This Delta deal was found by Cheapflights users on 12/10. 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.
jue. 12/256:00 amORD - BOI
1 stop9h 49mDelta
lun. 12/295:50 amBOI - ORD
1 stop5h 51mDelta
Deal found 12/10$302
This Delta deal was found by Cheapflights users on 12/8. 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. 12/97:02 pmMDW - BOI
1 stop6h 07mDelta
mié. 12/172:04 pmBOI - MDW
1 stop8h 43mDelta
Deal found 12/8$363
This Southwest deal was found by Cheapflights users on 12/10. 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. 12/316:00 pmMDW - BOI
1 stop6h 10mSouthwest
lun. 1/55:40 pmBOI - MDW
1 stop5h 25mSouthwest
Deal found 12/10$364
This United Airlines deal was found by Cheapflights users on 12/10. 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.
jue. 12/259:15 amORD - BOI
Nonstop4h 24mUnited Airlines
mar. 1/62:37 pmBOI - ORD
1 stop8h 22mUnited Airlines
Deal found 12/10$381
This American Airlines deal was found by Cheapflights users on 12/11. 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.
mié. 12/175:00 amORD - BOI
1 stop9h 38mAmerican Airlines
vie. 12/267:32 amBOI - ORD
Nonstop3h 48mAmerican Airlines
Deal found 12/11$385
This Southwest deal was found by Cheapflights users on 12/10. 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. 12/108:20 pmMDW - BOI
2 stops14h 55mSouthwest
mié. 12/1712:55 pmBOI - MDW
1 stop9h 00mSouthwest
Deal found 12/10$392
This Southwest deal was found by Cheapflights users on 12/8. 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.
mar. 12/98:20 amMDW - BOI
1 stop10h 30mSouthwest
vie. 12/124:50 pmBOI - MDW
1 stop6h 35mSouthwest
Deal found 12/8$395
This Expedia deal was found by Cheapflights users on 12/10. 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.
mié. 12/103:35 pmORD - BOI
1 stop9h 15mMultiple Airlines
vie. 12/1212:44 pmBOI - ORD
1 stop10h 28mMultiple Airlines
Deal found 12/10$396
This Southwest deal was found by Cheapflights users on 12/10. 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. 12/311:45 pmORD - BOI
2 stops10h 25mSouthwest
mié. 1/76:05 amBOI - ORD
1 stop8h 20mSouthwest
Deal found 12/10$397
This Southwest deal was found by Cheapflights users on 12/10. 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.
dom. 12/142:15 pmORD - BOI
2 stops11h 20mSouthwest
mar. 12/166:10 amBOI - ORD
1 stop8h 15mSouthwest
Deal found 12/10$400
This Southwest deal was found by Cheapflights users on 12/10. 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.
dom. 12/214:20 pmMDW - BOI
1 stop10h 05mSouthwest
lun. 12/298:45 pmBOI - MDW
1 stop7h 20mSouthwest
Deal found 12/10$403

Find flight deals from Illinois to Boise

Keep the following information in mind while searching for Illinois to Boise flight deals. Data was last updated diciembre 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$184
(Kiwi.com)

One-way from

$88
(Kiwi.com)

Popular in

March

Cheapest in

September

Average price

$420

Good round-trip deal

$329 or less

Good one-way deal

$320 or less
Provider with most accurate pricing for Chicago (CHI)-Boise Air Term. Gowen Fld flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Boise Air Term. Gowen Fld flights.
Search Deals
From Illinois to Boise Air Term. Gowen Fld
Search Deals
One-way flight from Illinois to Boise Air Term. Gowen Fld
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($11 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Illinois to Boise Air Term. Gowen Fld.
Search Deals
Price to beat on a one-way flight from Illinois to Boise Air Term. Gowen Fld.
Search Deals

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 diciembre 12, 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

ORD - BOI

ORDBOI

Chicago O'Hare Intl

jue. 1/22

3:35 pm-11:01 pm

1 stop8h 26m

Boise Air Term. Gowen Fld

dom. 1/25

6:23 am-2:38 pm

1 stop7h 15m

$228

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

dom. 2/1

8:00 am-3:10 pm

1 stop8h 10m

Boise Air Term. Gowen Fld

dom. 2/8

5:40 am-1:10 pm

1 stop6h 30m

$248

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

jue. 2/19

3:54 pm-11:59 pm

1 stop9h 05m

Boise Air Term. Gowen Fld

lun. 2/23

8:27 pm-2:11 pm

1 stop16h 44m

$248

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

lun. 1/26

8:00 am-3:10 pm

1 stop8h 10m

Boise Air Term. Gowen Fld

lun. 2/2

5:40 am-1:10 pm

1 stop6h 30m

$248

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

lun. 1/26

10:43 am-1:53 pm

Nonstop4h 10m

Boise Air Term. Gowen Fld

lun. 2/2

3:18 pm-7:59 pm

Nonstop3h 41m

$249

ChicagoBoise

MDW - BOI

MDWBOI

Chicago Midway

sáb. 1/3

5:15 am-10:05 am

1 stop5h 50m

Boise Air Term. Gowen Fld

mié. 1/7

6:40 am-2:45 pm

1 stop7h 05m

$269

ChicagoBoise

MDW - BOI

MDWBOI

Chicago Midway

jue. 1/22

1:49 pm-8:55 pm

1 stop8h 06m

Boise Air Term. Gowen Fld

jue. 1/29

5:20 am-1:09 pm

1 stop6h 49m

$269

ChicagoBoise

MDW - BOI

MDWBOI

Chicago Midway

lun. 1/5

6:35 pm-12:35 am

1 stop7h 00m

Boise Air Term. Gowen Fld

vie. 1/16

4:30 pm-12:25 am

1 stop6h 55m

$269

ChicagoBoise

MDW - BOI

MDWBOI

Chicago Midway

lun. 1/26

6:00 am-12:37 pm

1 stop7h 37m

Boise Air Term. Gowen Fld

dom. 2/1

5:20 am-1:06 pm

1 stop6h 46m

$269

ChicagoBoise

MDW - BOI

MDWBOI

Chicago Midway

mar. 1/6

5:05 am-11:10 am

1 stop7h 05m

Boise Air Term. Gowen Fld

sáb. 1/10

6:00 am-3:20 pm

1 stop8h 20m

$269

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

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 December is currently the most expensive (average of $288). 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 diciembre 12, 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 afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 17% on airfare.

Weekly flight availability from Illinois to Boise

Explore weekly flight availability from Illinois to Boise. 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 diciembre 12, 2025.

The most flights from USIL to BOI are scheduled on a Monday (6 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (6 on average).

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 4h 10m. 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?

    $77 is the cheapest one-way deal found within the past few days, from Alaska Airlines. You may also be able to find cheap deals on Delta and Southwest, with prices starting from $87 and $87, 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: American Airlines (86%), Air Canada (81%), Envoy Air (76%).

  • What are the cheapest flights from Illinois to Boise?

    While on average a flight from Illinois to Boise is generally $474, our data shows the cheapest flight currently is $249. When looking at the most popular route, (Chicago O'Hare Intl - Boise Air Term. Gowen Fld), you can expect to pay $259 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 December is currently the most expensive (average of $288). 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 diciembre 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$174Average$288FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$237Average$431FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$249Average$501FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$254Average$339FlexibilityNo cancel feeOn-time63%

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