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$100+ 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 1/21. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BOI
Dec 23 — Dec 301
Mon 12/23
Mon 12/30
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 December 18, 2024.

Round-trip from

$248
(Delta)

One-way from

$100
(Delta)
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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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 December 18, 2024.

This American Airlines deal was found by Cheapflights users on 12/18. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/305:10 pmORD - BOI
1 stop6h 51mAmerican Airlines
Sun 1/52:05 pmBOI - ORD
1 stop9h 26mAmerican Airlines
Deal found 12/18$353
This Delta deal was found by Cheapflights users on 12/16. 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 12/256:00 amSTL - BOI
1 stop8h 14mDelta
Tue 12/311:15 pmBOI - STL
1 stop7h 19mDelta
Deal found 12/16$392
This Delta deal was found by Cheapflights users on 12/17. 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 12/254:00 pmORD - BOI
1 stop8h 10mDelta
Thu 12/262:35 pmBOI - ORD
1 stop7h 17mDelta
Deal found 12/17$393
This United deal was found by Cheapflights users on 12/18. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/317:35 pmORD - BOI
Nonstop4h 14mUnited Airlines
Tue 1/142:32 pmBOI - ORD
1 stop8h 27mUnited Airlines
Deal found 12/18$404
This Cheapflightsfares deal was found by Cheapflights users on 12/17. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/299:54 pmORD - BOI
1 stop14h 08mSpirit Airlines
Sun 1/127:38 pmBOI - ORD
1 stop8h 53mSpirit Airlines
Deal found 12/17$419
This Southwest deal was found by Cheapflights users on 12/16. 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 12/311:45 pmORD - BOI
2 stops10h 15mSouthwest
Mon 1/63:30 pmBOI - ORD
1 stop6h 35mSouthwest
Deal found 12/16$428
This Delta deal was found by Cheapflights users on 12/18. 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 12/314:50 pmMDW - BOI
1 stop8h 05mDelta
Tue 1/145:30 amBOI - MDW
1 stop6h 16mDelta
Deal found 12/18$439
This Southwest deal was found by Cheapflights users on 12/16. 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 pmMDW - BOI
2 stops9h 00mSouthwest
Mon 1/63:30 pmBOI - MDW
1 stop6h 55mSouthwest
Deal found 12/16$468
This Southwest deal was found by Cheapflights users on 12/16. 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 12/246:35 amSTL - BOI
1 stop5h 15mSouthwest
Tue 12/313:30 pmBOI - STL
1 stop6h 30mSouthwest
Deal found 12/16$488
This Travelocity deal was found by Cheapflights users on 12/17. 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 12/269:54 pmORD - BOI
1 stop14h 08mMultiple Airlines
Tue 12/318:09 pmBOI - ORD
1 stop8h 21mMultiple Airlines
Deal found 12/17$528
This Alaska Airlines deal was found by Cheapflights users on 12/18. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/312:01 pmORD - BOI
1 stop6h 28mAlaska Airlines
Mon 1/612:59 pmBOI - ORD
2 stops10h 00mAlaska Airlines
Deal found 12/18$556
This American Airlines deal was found by Cheapflights users on 12/17. 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.
Sun 12/227:04 amSTL - BOI
1 stop6h 29mAmerican Airlines
Tue 1/216:39 amBOI - STL
1 stop6h 03mAmerican Airlines
Deal found 12/17$678

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 2,558,603 searches. Data last updated December 18, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

ChicagoBoise

MDW - BOI

MDWBOI

Chicago Midway

Fri 1/31

6:59 pm-11:58 pm

1 stop5h 59m

Boise Air Term. Gowen Fld

Fri 2/7

5:30 am-12:42 pm

1 stop6h 12m

$248

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

Thu 1/9

7:15 am-12:25 pm

1 stop6h 10m

Boise Air Term. Gowen Fld

Thu 1/16

5:55 am-1:47 pm

1 stop6h 52m

$248

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

Fri 2/21

7:45 am-1:51 pm

1 stop7h 06m

Boise Air Term. Gowen Fld

Tue 2/25

7:17 pm-6:07 am

1 stop9h 50m

$257

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

Fri 1/3

9:54 pm-11:02 am

1 stop14h 08m

Boise Air Term. Gowen Fld

Fri 1/10

7:38 pm-5:31 am

1 stop8h 53m

$260

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

Tue 3/25

2:35 pm-9:29 pm

1 stop7h 54m

Boise Air Term. Gowen Fld

Thu 3/27

5:25 pm-12:23 am

1 stop5h 58m

$280

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Wed 1/15

1:40 pm-9:52 pm

1 stop9h 12m

Boise Air Term. Gowen Fld

Wed 1/22

7:00 am-4:23 pm

1 stop8h 23m

$280

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

Thu 2/6

3:35 pm-11:58 pm

2 stops9h 23m

Boise Air Term. Gowen Fld

Mon 2/10

11:00 am-11:59 pm

1 stop11h 59m

$295

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Tue 1/14

4:36 pm-9:43 pm

1 stop6h 07m

Boise Air Term. Gowen Fld

Tue 1/21

2:32 pm-8:43 pm

1 stop5h 11m

$300

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Wed 1/15

6:00 am-6:29 pm

2 stops13h 29m

Boise Air Term. Gowen Fld

Wed 1/22

3:00 pm-11:14 pm

1 stop7h 14m

$307

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Wed 1/15

2:49 pm-8:52 pm

1 stop7h 03m

Boise Air Term. Gowen Fld

Wed 1/22

5:15 pm-1:53 pm

2 stops19h 38m

$331

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/18

Showing 1-10 of 27 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, October is the cheapest month in which you can book a flight from Illinois to Boise (average of $314). 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 December 18, 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.

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 December 18, 2024.
Peruse reviews from past customers who have flown with Spirit Airlines, 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
4,848 reviews

Food

7.2

Crew

8.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,848 reviews
Southwest
8.1
Very good
4,848 reviews

Food

7.2

Crew

8.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Alaska Airlines
8.0
Very good
9,554 reviews
Southwest
8.1
Very good
4,848 reviews

Food

7.2

Crew

8.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,604 reviews
Southwest
8.1
Very good
4,848 reviews

Food

7.2

Crew

8.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
9,055 reviews
Southwest
8.1
Very good
4,848 reviews

Food

7.2

Crew

8.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,848 reviews

Food

7.2

Crew

8.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

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?

    $100 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on Spirit Airlines and Southwest, with prices starting from $115 and $174, 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: Lufthansa (90%), SkyWest Airlines (90%), United Airlines (90%).

  • What are the cheapest flights from Illinois to Boise?

    While on average a flight from Illinois to Boise is generally $666, our data shows the cheapest flight currently is $283. When looking at the most popular route, (Chicago O'Hare Intl - Boise Air Term. Gowen Fld), you can expect to pay $191 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, October is the cheapest month in which you can book a flight from Illinois to Boise (average of $314). 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 6 airlines flying from Illinois to Boise

Discover the top 6 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 December 18, 2024.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$115Average$231FlexibilityNo cancel feeOn-time65%
Alaska AirlinesCheapest$209Average$338FlexibilityNo cancel feeOn-time75%
DeltaCheapest$216Average$345FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$258Average$515FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$258Average$353FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$340Average$656FlexibilityNo cancel feeOn-time69%
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