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$79+ Cheap flights from Idaho 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 11/19. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — ORD
Nov 5 — Nov 121
1 adult
Tue 11/5
Tue 11/12
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Find flight deals from Idaho to Illinois

Cheapest flights from Idaho to Illinois
Explore the most affordable flight options available from Idaho to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 31, 2024.

This Delta deal was found by Cheapflights users on 10/29. 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 11/2111:20 amBOI - ORD
1 stop5h 38mDelta
Mon 11/252:15 pmORD - BOI
1 stop9h 06mDelta
Deal found 10/29$248
This Mytrip deal was found by Cheapflights users on 10/30. 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 11/1911:51 amBOI - ORD
2 stops24h 01mSpirit Airlines
Thu 11/2111:51 amORD - BOI
2 stops24h 05mSpirit Airlines
Deal found 10/30$261
This Delta deal was found by Cheapflights users on 10/30. 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 11/1311:15 pmGEG - ORD
1 stop9h 35mDelta
Wed 11/207:00 pmORD - GEG
1 stop6h 48mDelta
Deal found 10/30$265
This Delta deal was found by Cheapflights users on 10/30. 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 11/1311:56 pmBOI - MDW
1 stop8h 36mDelta
Sun 11/176:00 amMDW - BOI
1 stop7h 40mDelta
Deal found 10/30$268
This Delta deal was found by Cheapflights users on 10/30. 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.
Fri 11/1511:15 pmGEG - MDW
1 stop8h 17mDelta
Tue 11/196:00 amMDW - GEG
1 stop7h 39mDelta
Deal found 10/30$288
This Kiwi.com deal was found by Cheapflights users on 10/30. 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.
Sun 11/178:45 pmGEG - ORD
1 stop6h 15mAlaska Airlines
Mon 11/187:19 pmORD - GEG
1 stop6h 34mAlaska Airlines
Deal found 10/30$306
This Southwest deal was found by Cheapflights users on 10/30. 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.
Sat 11/165:00 amBOI - MDW
1 stop5h 35mSouthwest
Mon 11/185:05 pmMDW - BOI
1 stop8h 00mSouthwest
Deal found 10/30$308
This American Airlines deal was found by Cheapflights users on 10/30. 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 12/213:21 pmGEG - ORD
1 stop7h 10mAmerican Airlines
Mon 12/236:35 pmORD - GEG
1 stop8h 04mAmerican Airlines
Deal found 10/30$313
This Southwest deal was found by Cheapflights users on 10/31. 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 11/143:35 pmGEG - MDW
1 stop5h 55mSouthwest
Mon 11/184:00 pmMDW - GEG
1 stop9h 50mSouthwest
Deal found 10/31$328
This Mytrip deal was found by Cheapflights users on 10/30. 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.
Mon 11/2511:51 amBOI - ORD
2 stops22h 05mMultiple Airlines
Thu 11/289:20 amORD - BOI
3 stops26h 36mMultiple Airlines
Deal found 10/30$331
This Delta deal was found by Cheapflights users on 10/30. 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 12/42:10 pmGEG - STL
1 stop5h 45mDelta
Sun 12/86:46 pmSTL - GEG
1 stop7h 02mDelta
Deal found 10/30$336
This Southwest deal was found by Cheapflights users on 10/30. 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 11/1911:55 amBOI - ORD
2 stops9h 40mSouthwest
Thu 11/212:55 pmORD - BOI
1 stop9h 55mSouthwest
Deal found 10/30$353

Find flights from Idaho to Illinois within your budget

Customize your flight search to find flights from Idaho 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 2,570,725 searches. Data last updated October 31, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

BoiseChicago

BOI - ORD

BOIORD

Boise Air Term. Gowen Fld

Tue 11/19

11:51 am-10:06 pm

3 stops33h 15m

$79

BoiseChicago

BOI - ORD

BOIORD

Boise Air Term. Gowen Fld

Mon 12/2

7:49 pm-11:52 am

1 stop15h 03m

$89

BoiseChicago

BOI - MDW

BOIMDW

Boise Air Term. Gowen Fld

Sun 12/8

5:35 am-1:31 pm

1 stop6h 56m

$114

SpokaneChicago

GEG - ORD

GEGORD

Spokane

Fri 1/24

7:21 pm-2:03 pm

1 stop16h 42m

$125

JacksonChicago

JAC - ORD

JACORD

Jackson Hole

Thu 1/30

12:47 pm-4:51 pm

Nonstop3h 04m

$139

SpokaneChicago

GEG - ORD

GEGORD

Spokane

Fri 1/24

5:00 am-2:55 pm

1 stop7h 55m

$154

BoiseChicago

BOI - MDW

BOIMDW

Boise Air Term. Gowen Fld

Mon 11/25

5:30 am-7:05 pm

2 stops12h 35m

$220

BoiseChicago

BOI - ORD

BOIORD

Boise Air Term. Gowen Fld

Mon 11/25

11:56 pm-8:15 am

1 stop7h 19m

$114

SpokaneChicago

GEG - MDW

GEGMDW

Spokane

Sun 12/8

5:30 am-1:31 pm

1 stop6h 01m

$119

SpokaneChicago

GEG - ORD

GEGORD

Spokane

Wed 12/11

3:40 pm-11:59 pm

1 stop6h 19m

$119

Flights are sorted by cheapest first

Deals found on 10/30

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

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

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

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

Currently, September is the cheapest month in which you can book a flight from Idaho to Illinois (average of $232). Flying from Idaho to Illinois in June is currently the most expensive (average of $308). 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 ID to IL?

Find hourly flight availability from Idaho 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 October 31, 2024.

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

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 October 31, 2024.
Read through reviews of airlines operating flights from Idaho to Illinois, such as Southwest, United Airlines and Delta. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
5,116 reviews

Crew

8.7

Entertainment

7.7

Food

7.2

Boarding

8.3

Comfort

8.1

Overall

8.1

Reviews

1 / 10

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

Southwest
8.1
Very good
5,116 reviews
Southwest
8.1
Very good
5,116 reviews

Crew

8.7

Entertainment

7.7

Food

7.2

Boarding

8.3

Comfort

8.1

Overall

8.1

Reviews

1 / 10

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

Alaska Airlines
8.0
Very good
9,420 reviews
Southwest
8.1
Very good
5,116 reviews

Crew

8.7

Entertainment

7.7

Food

7.2

Boarding

8.3

Comfort

8.1

Overall

8.1

Reviews

1 / 10

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

Delta
8.0
Very good
8,835 reviews
Southwest
8.1
Very good
5,116 reviews

Crew

8.7

Entertainment

7.7

Food

7.2

Boarding

8.3

Comfort

8.1

Overall

8.1

Reviews

1 / 10

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

Aeromexico
7.5
Good
2,032 reviews
Southwest
8.1
Very good
5,116 reviews

Crew

8.7

Entertainment

7.7

Food

7.2

Boarding

8.3

Comfort

8.1

Overall

8.1

Reviews

1 / 10

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

United Airlines
7.4
Good
9,240 reviews
Southwest
8.1
Very good
5,116 reviews

Crew

8.7

Entertainment

7.7

Food

7.2

Boarding

8.3

Comfort

8.1

Overall

8.1

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 Idaho to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • Can I find flights from Idaho to Illinois for under $200 on Cheapflights?

    Yes, there are multiple flights from Idaho to Illinois for under $200. The cheapest flight booked recently is on Spirit Airlines for just $174, but on average you can expect to pay $303.

  • Are there nonstop flights from Idaho to Illinois for under $400 on Cheapflights?

    Cheapflights has at least 4 direct flights from Idaho to Illinois under $400. A good price for a nonstop flight from Idaho to Illinois is less than $445.

  • Are there last-minute flights available from Idaho to Illinois for under $300?

    There are currently 20+ open flights from Idaho to Illinois within the next 7 days for less than $300.

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

    $79 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 Alaska Airlines, with prices starting from $114 and $125, respectively.

  • What does BOI to ORD mean?

    BOI and ORD are unique codes to identify airports used in the aviation industry. They are defined by IATA (International Air Transport Association) and are commonly called IATA codes. BOI to ORD refers to a flight route from Boise Air Term. Gowen Fld Airport to Chicago O'Hare Intl Airport. Chicago Midway Airport (MDW), Moline Quad-City Airport (MLI), Greater Peoria Airport (PIA), Bloomington-Normal Airport (BMI), Champaign University-Willard Airport (CMI) are other airports near this flight route and their unique identifiers/IATA codes.

  • Can I find deals for flights from Idaho to Illinois that include extra baggage allowance?

    The amount of baggage you can bring on your Idaho to Illinois flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Idaho to Illinois with specific airlines?

    Yes, Cheapflights allows you to browse and filter Idaho to Illinois flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Idaho 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.

  • Can I find deals for flights from Idaho to Illinois that allow pets onboard?

    Many airlines flying from Idaho to Illinois offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Idaho to Illinois?

    Yes, you can often find last-minute deals on Idaho to Illinois flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Idaho to Illinois flight deals updated?

    The Idaho to Illinois flight deals you see on this page were last updated on 10/31.

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

    Currently, September is the cheapest month in which you can book a flight from Idaho to Illinois (average of $232). Flying from Idaho to Illinois in June is currently the most expensive (average of $308). 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

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Alternative routes for Idaho to Illinois

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Top 5 airlines flying from Idaho to Illinois

Discover the top 5 airlines that operate flights from Idaho 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 2,570,725 searches. Data last updated October 31, 2024.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$114Average$244FlexibilityNo cancel feeOn-time65%
Alaska AirlinesCheapest$154Average$353FlexibilityNo cancel feeOn-time75%
DeltaCheapest$185Average$338FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$228Average$540FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$274Average$603FlexibilityNo cancel feeOn-time69%
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