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$95+ 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 1/1. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BOI
Nov 25 — Dec 21
Mon 11/25
Mon 12/2
1 adult, Economy
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Cheap flight deals from Illinois to Boise

Discover tips and strategies to find the most affordable flight options for your journey from Illinois (USIL) to Boise (BOI). 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 20, 2024.

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 November 20, 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.
Tue 12/314:50 pmMDW - BOI
1 stop8h 05mDelta
Tue 1/145:30 amBOI - MDW
1 stop6h 16mDelta
Deal found 11/20$248
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/39:10 pmORD - BOI
2 stops18h 40mSpirit Airlines
Sat 12/73:45 pmBOI - ORD
1 stop12h 45mSpirit Airlines
Deal found 11/19$248
This Delta deal was found by Cheapflights users on 11/18. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/177:10 pmORD - BOI
1 stop6h 33mDelta
Tue 12/242:55 pmBOI - ORD
1 stop8h 01mDelta
Deal found 11/18$264
This Travelocity deal was found by Cheapflights users on 11/18. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/59:53 pmORD - BOI
1 stop14h 05mMultiple Airlines
Mon 12/98:55 pmBOI - ORD
1 stop7h 24mMultiple Airlines
Deal found 11/18$266
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 12/187:20 amSTL - BOI
1 stop6h 00mDelta
Wed 12/255:32 amBOI - STL
1 stop8h 17mDelta
Deal found 11/20$300
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.
Thu 12/197:10 amORD - BOI
1 stop7h 18mUnited Airlines
Thu 1/25:20 pmBOI - ORD
1 stop5h 39mUnited Airlines
Deal found 11/19$316
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/137:00 amSTL - BOI
1 stop10h 12mUnited Airlines
Sun 12/156:40 amBOI - STL
1 stop5h 03mUnited Airlines
Deal found 11/20$317
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.
Mon 12/167:20 amSTL - BOI
1 stop7h 11mAmerican Airlines
Thu 12/192:05 pmBOI - STL
1 stop9h 01mAmerican Airlines
Deal found 11/20$337
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/257:00 amORD - BOI
1 stop9h 01mAlaska Airlines
Wed 1/18:00 pmBOI - ORD
1 stop7h 40mAlaska Airlines
Deal found 11/19$360
This Southwest deal was found by Cheapflights users on 11/18. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/43:25 pmMDW - BOI
1 stop8h 30mSouthwest
Sun 12/222:55 pmBOI - MDW
1 stop8h 55mSouthwest
Deal found 11/18$403
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 12/1312:15 pmSTL - BOI
3 stops27h 35mMultiple Airlines
Sun 12/1511:57 amBOI - STL
3 stops27h 28mMultiple Airlines
Deal found 11/20$405
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 11/266:30 amSTL - BOI
1 stop10h 00mSouthwest
Tue 12/311:55 amBOI - STL
1 stop7h 45mSouthwest
Deal found 11/19$466

Find flights from Illinois to Boise within your budget

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 2,629,791 searches. Data last updated November 20, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

ChicagoBoise

MDW - BOI

MDWBOI

Chicago Midway

Tue 12/31

4:50 pm-11:55 pm

1 stop8h 05m

Boise Air Term. Gowen Fld

Tue 1/14

5:30 am-12:46 pm

1 stop6h 16m

$248

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

Tue 12/3

9:10 pm-2:50 pm

2 stops18h 40m

Boise Air Term. Gowen Fld

Sat 12/7

3:45 pm-5:30 am

1 stop12h 45m

$248

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

Wed 1/8

9:00 am-12:20 pm

Nonstop4h 20m

Boise Air Term. Gowen Fld

Tue 1/14

12:15 pm-5:00 pm

Nonstop3h 45m

$249

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

Fri 1/10

2:10 pm-8:29 pm

1 stop7h 19m

Boise Air Term. Gowen Fld

Mon 1/13

9:15 am-9:58 pm

2 stops11h 43m

$253

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Sat 1/18

7:40 am-6:29 pm

2 stops11h 49m

Boise Air Term. Gowen Fld

Sat 1/25

10:40 am-9:33 pm

2 stops9h 53m

$253

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

Thu 12/5

9:53 pm-10:58 am

1 stop14h 05m

Boise Air Term. Gowen Fld

Mon 12/9

8:55 pm-5:19 am

1 stop7h 24m

$266

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

Mon 5/5

6:50 pm-9:26 am

1 stop15h 36m

Boise Air Term. Gowen Fld

Thu 5/8

8:30 pm-5:04 am

1 stop7h 34m

$298

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Fri 12/13

7:00 am-4:12 pm

1 stop10h 12m

Boise Air Term. Gowen Fld

Sun 12/15

6:40 am-12:43 pm

1 stop5h 03m

$317

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

Sat 2/22

1:30 pm-11:55 pm

2 stops11h 25m

Boise Air Term. Gowen Fld

Thu 2/27

5:30 am-4:45 pm

1 stop10h 15m

$333

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Mon 12/16

7:20 am-1:31 pm

1 stop7h 11m

Boise Air Term. Gowen Fld

Thu 12/19

2:05 pm-12:06 am

1 stop9h 01m

$337

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/20

Showing 1-10 of 32 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.

Travel insights for flights from Illinois to Boise

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

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

Currently, January is the cheapest month in which you can book a flight from Illinois to Boise (average of $310). Flying from Illinois to Boise in June is currently the most expensive (average of $436). 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 November 20, 2024.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Boise as you normally would.

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 November 20, 2024.

The most flights from USIL to BOI are scheduled on a Monday (5 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (5 on average).

Rainfall in Boise by month

Plan your trip to Boise by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Boise ranges from 0.2 - 1.6 inches per month. December is typically the wettest month, when rainfall can reach 1.6 in. August is typically the driest time to visit Boise when rainfall is around 0.2 in.

Temperature in Boise by month

Plan your trip to Boise by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Boise, 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 75.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 30.2 F).

Reviews of airlines servicing Boise

Get insights into the airlines that provide service to Boise. 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 Boise. Reviews last updated November 20, 2024.
Peruse reviews from past customers who have flown with Southwest, Alaska Airlines and Delta from Illinois to Boise to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
5,014 reviews

Boarding

8.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Comfort

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
5,014 reviews
Southwest
8.1
Very good
5,014 reviews

Boarding

8.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Comfort

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
9,461 reviews
Southwest
8.1
Very good
5,014 reviews

Boarding

8.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Comfort

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
8,756 reviews
Southwest
8.1
Very good
5,014 reviews

Boarding

8.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Comfort

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
9,171 reviews
Southwest
8.1
Very good
5,014 reviews

Boarding

8.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Comfort

8.1

Food

7.2

Reviews

1 / 10

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

WestJet
7.3
Good
2,811 reviews
Southwest
8.1
Very good
5,014 reviews

Boarding

8.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Comfort

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 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.

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

    $95 is the cheapest one-way deal found within the past few days, from Spirit Airlines. You may also be able to find cheap deals on Delta and American Airlines, with prices starting from $114 and $167, 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: SkyWest Airlines (89%), Air Canada (89%), United Airlines (89%).

  • What are the cheapest flights from Illinois to Boise?

    While on average a flight from Illinois to Boise is generally $441, our data shows the cheapest flight currently is $293. When looking at the most popular route, (Chicago O'Hare Intl - Boise Air Term. Gowen Fld), you can expect to pay $228 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, January is the cheapest month in which you can book a flight from Illinois to Boise (average of $310). Flying from Illinois to Boise in June is currently the most expensive (average of $436). 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 Illinois to Boise

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Illinois to Boise

Discover the top 5 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 2,629,791 searches. Data last updated November 20, 2024.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$115Average$239FlexibilityNo cancel feeOn-time65%
Alaska AirlinesCheapest$138Average$339FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$216Average$514FlexibilityNo cancel feeOn-time71%
DeltaCheapest$216Average$345FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$338Average$702FlexibilityNo cancel feeOn-time69%
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