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Idaho

$65+ 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 12/4. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BOI
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
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 November 6, 2025.

This Priceline deal was found by Cheapflights users on 11/6. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/47:00 amORD - GEG
1 stop6h 13mFrontier
Thu 12/1112:08 pmGEG - ORD
1 stop10h 04mFrontier
Deal found 11/6$170
This American Airlines deal was found by Cheapflights users on 11/5. 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.
Fri 12/510:25 amORD - GEG
Nonstop4h 05mAmerican Airlines
Mon 12/81:14 pmGEG - ORD
Nonstop4h 03mAmerican Airlines
Deal found 11/5$195
This American Airlines deal was found by Cheapflights users on 11/4. 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.
Wed 12/310:25 amORD - GEG
Nonstop4h 05mAmerican Airlines
Wed 12/101:14 pmGEG - ORD
Nonstop4h 03mAmerican Airlines
Deal found 11/4$204
This Orbitz deal was found by Cheapflights users on 11/3. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/33:05 pmORD - GEG
1 stop10h 54mMultiple Airlines
Thu 12/1112:08 pmGEG - ORD
1 stop10h 04mMultiple Airlines
Deal found 11/3$212
This Orbitz deal was found by Cheapflights users on 11/6. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/65:51 pmORD - GEG
1 stop7h 23mMultiple Airlines
Thu 12/1112:08 pmGEG - ORD
1 stop10h 04mMultiple Airlines
Deal found 11/6$214
This Delta deal was found by Cheapflights users on 11/5. 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 12/57:20 amORD - GEG
1 stop6h 50mDelta
Mon 12/81:12 pmGEG - ORD
1 stop8h 49mDelta
Deal found 11/5$215
This Southwest deal was found by Cheapflights users on 11/3. 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 12/35:15 amMDW - GEG
1 stop8h 40mSouthwest
Wed 12/1012:40 pmGEG - MDW
1 stop5h 25mSouthwest
Deal found 11/3$215
This Southwest deal was found by Cheapflights users on 11/3. 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 12/31:00 pmORD - GEG
1 stop11h 00mSouthwest
Sat 12/1312:05 pmGEG - ORD
1 stop8h 30mSouthwest
Deal found 11/3$220
This Delta deal was found by Cheapflights users on 11/4. 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.
Sat 12/61:14 pmMDW - GEG
2 stops9h 43mDelta
Thu 12/111:12 pmGEG - MDW
1 stop8h 35mDelta
Deal found 11/4$220
This United Airlines deal was found by Cheapflights users on 11/4. 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.
Wed 12/32:40 pmORD - GEG
1 stop8h 19mUnited Airlines
Wed 12/101:47 pmGEG - ORD
1 stop8h 12mUnited Airlines
Deal found 11/4$224
This Delta deal was found by Cheapflights users on 11/4. 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 12/36:00 amMDW - GEG
1 stop8h 02mDelta
Wed 12/101:12 pmGEG - MDW
1 stop8h 35mDelta
Deal found 11/4$224
This Delta deal was found by Cheapflights users on 11/4. 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.
Sat 12/67:50 amORD - GEG
1 stop6h 40mDelta
Sat 12/131:10 pmGEG - ORD
1 stop8h 49mDelta
Deal found 11/4$225

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 November 6, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$138
(Frontier)

One-way from

$65
(Priceline)

Popular in

November

Cheapest in

September

Average price

$491

Good round-trip deal

$298 or less

Good one-way deal

$295 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. 7% potential increase in price ($34 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 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 November 6, 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

Sat 1/10

8:00 am-12:44 pm

1 stop6h 44m

Spokane

Mon 1/12

5:00 am-1:10 pm

1 stop6h 10m

$195

ChicagoSpokane

ORD - GEG

ORDGEG

Chicago O'Hare Intl

Tue 1/6

2:12 pm-6:46 pm

1 stop6h 34m

Spokane

Wed 1/14

7:30 am-5:10 pm

1 stop7h 40m

$195

ChicagoSpokane

ORD - GEG

ORDGEG

Chicago O'Hare Intl

Wed 1/7

6:06 pm-11:04 pm

1 stop6h 58m

Spokane

Wed 1/14

5:45 am-5:10 pm

1 stop9h 25m

$195

ChicagoSpokane

ORD - GEG

ORDGEG

Chicago O'Hare Intl

Mon 1/5

6:00 am-12:48 pm

1 stop8h 48m

Spokane

Wed 1/14

5:45 am-5:10 pm

1 stop9h 25m

$195

ChicagoSpokane

MDW - GEG

MDWGEG

Chicago Midway

Thu 1/8

12:25 pm-9:58 am

1 stop23h 33m

Spokane

Thu 1/15

12:28 pm-8:45 pm

2 stops30h 17m

$214

ChicagoSpokane

ORD - GEG

ORDGEG

Chicago O'Hare Intl

Mon 1/5

8:50 am-1:05 pm

1 stop6h 15m

Spokane

Fri 1/9

3:40 pm-11:53 pm

1 stop6h 13m

$215

ChicagoSpokane

MDW - GEG

MDWGEG

Chicago Midway

Wed 12/3

5:15 am-11:55 am

1 stop8h 40m

Spokane

Wed 12/10

12:40 pm-8:05 pm

1 stop5h 25m

$215

ChicagoSpokane

ORD - GEG

ORDGEG

Chicago O'Hare Intl

Thu 1/8

2:20 pm-8:58 pm

1 stop8h 38m

Spokane

Fri 1/9

1:15 pm-9:52 pm

1 stop6h 37m

$215

ChicagoSpokane

MDW - GEG

MDWGEG

Chicago Midway

Wed 12/3

5:15 am-11:55 am

1 stop8h 40m

Spokane

Tue 12/9

12:40 pm-8:05 pm

1 stop5h 25m

$215

ChicagoSpokane

ORD - GEG

ORDGEG

Chicago O'Hare Intl

Fri 1/9

2:20 pm-6:47 pm

1 stop6h 27m

Spokane

Sun 1/11

1:20 pm-11:53 pm

1 stop8h 33m

$215

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/6

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 November 6, 2025.

It’s typically best to fly out from Illinois to Idaho in the evening. Doing so could potentially save you 30% 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 November 6, 2025.

The most flights from USIL to USID are scheduled on a Wednesday (7 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (4 on average).

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 November 6, 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
11,247 reviews

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.1

Comfort

7.8

Entertainment

7.0

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
11,247 reviews
Alaska Airlines
8.0
Very good
11,247 reviews

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.1

Comfort

7.8

Entertainment

7.0

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
4,241 reviews
Alaska Airlines
8.0
Very good
11,247 reviews

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.1

Comfort

7.8

Entertainment

7.0

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
7.9
Good
8,001 reviews
Alaska Airlines
8.0
Very good
11,247 reviews

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.1

Comfort

7.8

Entertainment

7.0

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
9,007 reviews
Alaska Airlines
8.0
Very good
11,247 reviews

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.1

Comfort

7.8

Entertainment

7.0

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
11,040 reviews
Alaska Airlines
8.0
Very good
11,247 reviews

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.1

Comfort

7.8

Entertainment

7.0

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 15m. Fly via Alaska Airlines, Delta, or Southwest to get the fastest option. Illinois and Idaho are separated by a distance of 1493 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 $95 on Frontier. Other airlines that offer cheap prices include Alaska Airlines from $97 and United Airlines from $106 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 November 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$174Average$335FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$237Average$464FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$253Average$532FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$254Average$348FlexibilityNo cancel feeOn-time63%

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