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Idaho

$54+ Cheap flights from Illinois to Idaho

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 11/13. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BOI
Nov 13 — Nov 201
Thu 11/13
Thu 11/20
1 adult, Economy
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Find flight deals from Illinois to Idaho

Cheapest flights from Illinois to Idaho
Explore the most affordable flight options available from Illinois to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 14, 2025.

This Expedia deal was found by Cheapflights users on 10/13. 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.
Tue 10/288:00 amORD - BOI
1 stop9h 17mMultiple Airlines
Thu 10/3012:33 pmBOI - ORD
1 stop11h 10mMultiple Airlines
Deal found 10/13$199
This Frontier deal was found by Cheapflights users on 10/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/266:50 amORD - BOI
1 stop5h 53mFrontier
Thu 10/3012:33 pmBOI - ORD
1 stop11h 10mFrontier
Deal found 10/12$212
This Alaska Airlines deal was found by Cheapflights users on 10/12. 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.
Sat 12/133:05 pmORD - GEG
1 stop10h 54mAlaska Airlines
Tue 12/167:00 amGEG - ORD
1 stop10h 54mAlaska Airlines
Deal found 10/12$214
This SmartFares deal was found by Cheapflights users on 10/13. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/277:00 amORD - GEG
1 stop6h 38mAlaska Airlines
Thu 12/41:33 pmGEG - ORD
1 stop6h 57mAlaska Airlines
Deal found 10/13$216
This Kiwi.com deal was found by Cheapflights users on 10/12. 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.
Sat 12/67:39 pmORD - GEG
1 stop17h 49mFrontier
Thu 12/1112:23 pmGEG - ORD
1 stop28h 11mFrontier
Deal found 10/12$221
This Alaska Airlines deal was found by Cheapflights users on 10/13. 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 11/143:25 pmORD - BOI
1 stop9h 29mAlaska Airlines
Mon 11/178:50 pmBOI - ORD
1 stop8h 32mAlaska Airlines
Deal found 10/13$228
This Alaska Airlines deal was found by Cheapflights users on 10/12. 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 12/126:00 amORD - GEG
1 stop8h 39mAlaska Airlines
Tue 12/161:33 pmGEG - ORD
1 stop6h 57mAlaska Airlines
Deal found 10/12$231
This Alaska Airlines deal was found by Cheapflights users on 10/13. 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 10/315:53 pmORD - BOI
1 stop17h 36mAlaska Airlines
Mon 11/38:50 pmBOI - ORD
1 stop8h 32mAlaska Airlines
Deal found 10/13$234
This American Airlines deal was found by Cheapflights users on 10/12. 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 12/1310:25 amORD - GEG
Nonstop4h 05mAmerican Airlines
Tue 12/161:14 pmGEG - ORD
Nonstop4h 03mAmerican Airlines
Deal found 10/12$235
This Delta deal was found by Cheapflights users on 10/12. 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 11/52:29 pmSTL - GEG
2 stops10h 19mDelta
Mon 11/107:38 pmGEG - STL
2 stops19h 31mDelta
Deal found 10/12$236
This Alaska Airlines deal was found by Cheapflights users on 10/13. 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 11/66:00 amORD - GEG
1 stop8h 26mAlaska Airlines
Mon 11/107:39 pmGEG - ORD
1 stop8h 43mAlaska Airlines
Deal found 10/13$236
This Frontier deal was found by Cheapflights users on 10/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/306:00 amORD - BOI
1 stop6h 48mFrontier
Sun 11/212:33 pmBOI - ORD
1 stop11h 16mFrontier
Deal found 10/13$238

Cheap flight deals from Illinois to Idaho

Keep the following information in mind while searching for Illinois to Idaho flight deals. Data was last updated October 14, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$179
(Orbitz)

One-way from

$54
(Frontier)

Popular in

November

Cheapest in

September

Average price

$308

Good round-trip deal

$281 or less

Good one-way deal

$168 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 Idaho
Search Deals
One-way flight from Illinois to Idaho
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($41 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
Price to beat on a round-trip flight from Illinois to Idaho.
Search Deals
Price to beat on a one-way flight from Illinois to Idaho.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Idaho 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 14, 2025.
Use the filters below to find and compare flights from Illinois to Idaho that are best for you.

Fly from

Illinois

Fly to

Idaho

Route

Depart

Return

Price

ChicagoSpokane

ORD - GEG

ORDGEG

Chicago O'Hare Intl

Wed 1/28

3:25 pm-10:26 pm

1 stop9h 01m

Spokane

Mon 2/2

3:43 pm-11:55 pm

1 stop6h 12m

$225

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

Fri 11/7

2:54 pm-11:49 pm

1 stop9h 55m

Boise Air Term. Gowen Fld

Sat 11/15

11:43 am-9:40 pm

1 stop8h 57m

$228

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

Thu 12/4

3:05 pm-11:55 pm

1 stop9h 50m

Boise Air Term. Gowen Fld

Sun 12/7

5:59 pm-6:21 am

1 stop11h 22m

$228

ChicagoSpokane

ORD - GEG

ORDGEG

Chicago O'Hare Intl

Tue 1/27

2:06 pm-6:43 pm

1 stop6h 37m

Spokane

Sun 2/1

5:45 am-2:38 pm

1 stop6h 53m

$231

ChicagoSpokane

ORD - GEG

ORDGEG

Chicago O'Hare Intl

Wed 1/28

6:06 pm-12:23 am

1 stop8h 17m

Spokane

Fri 1/30

5:00 am-1:10 pm

1 stop6h 10m

$231

ChicagoSpokane

ORD - GEG

ORDGEG

Chicago O'Hare Intl

Sun 1/25

2:06 pm-6:48 pm

1 stop6h 42m

Spokane

Tue 2/3

5:00 am-1:10 pm

1 stop6h 10m

$231

ChicagoSpokane

ORD - GEG

ORDGEG

Chicago O'Hare Intl

Thu 11/6

8:00 am-1:58 pm

1 stop7h 58m

Spokane

Mon 11/10

8:59 pm-6:22 am

1 stop7h 23m

$236

ChicagoSpokane

ORD - GEG

ORDGEG

Chicago O'Hare Intl

Thu 1/29

2:06 pm-6:48 pm

1 stop6h 42m

Spokane

Mon 2/2

5:45 am-2:38 pm

1 stop6h 53m

$236

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

Thu 10/30

6:00 am-11:48 am

1 stop6h 48m

Boise Air Term. Gowen Fld

Sun 11/2

12:33 pm-12:49 am

1 stop11h 16m

$238

ChicagoSpokane

ORD - GEG

ORDGEG

Chicago O'Hare Intl

Thu 1/29

8:00 am-12:44 pm

1 stop6h 44m

Spokane

Sun 2/1

5:45 am-2:38 pm

1 stop6h 53m

$242

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/13

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

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

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

Currently, July is the cheapest month in which you can book a flight from Illinois to Idaho (average of $149). Flying from Illinois to Idaho 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 ID?

Find hourly flight availability from Illinois to Idaho. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 14, 2025.

It’s typically best to fly out from Illinois to Idaho in the evening. Doing so could potentially save you 29% on the flight price compared to flying in the morning, which is usually more expensive.

Weekly flight availability from Illinois to Idaho

Explore weekly flight availability from Illinois to Idaho. 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 October 14, 2025.

The most flights from USIL to USID 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).

How much does it cost to fly round-trip from Illinois to Idaho?

Reviews of airlines servicing Idaho

Get insights into the airlines that provide service to Idaho. 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 Idaho. Reviews last updated October 14, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest, and Delta from Illinois to Idaho. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,080 reviews

Entertainment

7.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Alaska Airlines
8.0
Very good
11,080 reviews
Alaska Airlines
8.0
Very good
11,080 reviews

Entertainment

7.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Southwest
8.0
Very good
4,238 reviews
Alaska Airlines
8.0
Very good
11,080 reviews

Entertainment

7.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Delta
8.0
Very good
7,975 reviews
Alaska Airlines
8.0
Very good
11,080 reviews

Entertainment

7.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
United Airlines
7.4
Good
8,976 reviews
Alaska Airlines
8.0
Very good
11,080 reviews

Entertainment

7.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
American Airlines
7.2
Good
11,042 reviews
Alaska Airlines
8.0
Very good
11,080 reviews

Entertainment

7.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.

Related info for your journey

Find useful and relevant information for your journey from Illinois to Idaho. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Illinois to Idaho?

    There are many flights that can get you from Illinois to Idaho in 6h 48m. Fly via Alaska Airlines, Frontier, or Delta to get the fastest option. Illinois and Idaho are separated by a distance of 1432 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    One-way options have recently been found by users for as low as $80 on Frontier. Other airlines that offer cheap prices include Alaska Airlines from $107 and Southwest from $128 one-way.

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

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

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

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

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

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

    Currently, July is the cheapest month in which you can book a flight from Illinois to Idaho (average of $149). Flying from Illinois to Idaho 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

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Alternative routes for Illinois to Idaho

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Illinois to Idaho

Discover the top 4 airlines that operate flights from Illinois to Idaho. 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 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$174Average$335FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$237Average$464FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$239Average$348FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$257Average$541FlexibilityNo cancel feeOn-time69%

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