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Idaho

$69+ 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 8/7. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BOI
jul. 8 — jul. 151
mar. 7/8
mar. 7/15
1 adult, Economy
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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 julio 3, 2025.

Round-trip from

$202
(Trip.com)

One-way from

$69
(Priceline)

Popular in

November

Cheapest in

September

Average price

$442

Good round-trip deal

$284 or less

Good one-way deal

$167 or less
From Illinois to Idaho
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One-way flight from Illinois to Idaho
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Highest demand for flights based on searches. 12% potential increase in price ($57 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Illinois to Idaho.
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Price to beat on a one-way flight from Illinois to Idaho.
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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 julio 3, 2025.

This Trip.com deal was found by Cheapflights users on 7/2. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/166:00 amORD - BOI
1 stop10h 04mHawaiian Airlines
sáb. 8/234:00 pmBOI - ORD
1 stop6h 59mHawaiian Airlines
Deal found 7/2$202
This Priceline deal was found by Cheapflights users on 7/2. 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.
jue. 7/175:40 amORD - BOI
1 stop7h 06mMultiple Airlines
lun. 7/217:48 pmBOI - ORD
1 stop9h 15mMultiple Airlines
Deal found 7/2$206
This Priceline deal was found by Cheapflights users on 7/1. 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.
jue. 10/96:00 amORD - BOI
1 stop6h 53mFrontier
jue. 10/1612:48 pmBOI - ORD
1 stop10h 05mFrontier
Deal found 7/1$207
This FlightHub deal was found by Cheapflights users on 7/1. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/305:35 pmORD - BOI
1 stop24h 36mSpirit Airlines
sáb. 9/139:16 pmBOI - ORD
1 stop6h 30mSpirit Airlines
Deal found 7/1$209
This Alaska Airlines deal was found by Cheapflights users on 7/2. 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.
sáb. 9/2010:00 amORD - BOI
1 stop9h 16mAlaska Airlines
mar. 9/238:00 amBOI - ORD
1 stop7h 49mAlaska Airlines
Deal found 7/2$214
This Delta deal was found by Cheapflights users on 7/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/167:17 pmMDW - BOI
1 stop5h 37mDelta
mar. 8/195:30 amBOI - MDW
1 stop6h 33mDelta
Deal found 7/3$215
This Delta deal was found by Cheapflights users on 7/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/208:52 amORD - BOI
1 stop6h 23mDelta
sáb. 10/112:00 pmBOI - ORD
1 stop8h 47mDelta
Deal found 7/3$215
This American Airlines deal was found by Cheapflights users on 7/2. 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.
sáb. 8/169:50 amORD - BOI
Nonstop3h 39mAmerican Airlines
sáb. 8/231:10 pmBOI - ORD
Nonstop3h 33mAmerican Airlines
Deal found 7/2$216
This Trip.com deal was found by Cheapflights users on 7/2. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/166:00 amORD - GEG
1 stop8h 29mMultiple Airlines
sáb. 8/2312:14 pmGEG - ORD
Nonstop3h 41mMultiple Airlines
Deal found 7/2$227
This Southwest deal was found by Cheapflights users on 7/1. 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.
mié. 9/172:05 pmMDW - GEG
2 stops10h 25mSouthwest
dom. 9/211:15 pmGEG - MDW
Nonstop3h 25mSouthwest
Deal found 7/1$230
This Delta deal was found by Cheapflights users on 7/2. 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.
sáb. 8/168:25 amORD - GEG
2 stops9h 48mDelta
sáb. 8/236:50 amGEG - ORD
1 stop8h 14mDelta
Deal found 7/2$232
This American Airlines deal was found by Cheapflights users on 7/2. 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.
jue. 9/1810:46 amORD - GEG
Nonstop3h 58mAmerican Airlines
dom. 9/217:00 amGEG - ORD
Nonstop3h 37mAmerican Airlines
Deal found 7/2$235

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 julio 3, 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

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

sáb. 8/16

6:00 am-3:04 pm

1 stop10h 04m

Boise Air Term. Gowen Fld

sáb. 8/23

4:00 pm-11:59 pm

1 stop6h 59m

$202

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

jue. 7/17

5:40 am-11:46 am

1 stop7h 06m

Boise Air Term. Gowen Fld

lun. 7/21

7:48 pm-6:03 am

1 stop9h 15m

$206

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

jue. 10/9

6:00 am-11:53 am

1 stop6h 53m

Boise Air Term. Gowen Fld

jue. 10/16

12:48 pm-11:53 pm

1 stop10h 05m

$207

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

sáb. 8/30

5:35 pm-5:11 pm

1 stop24h 36m

Boise Air Term. Gowen Fld

sáb. 9/13

9:16 pm-4:46 am

1 stop6h 30m

$209

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

sáb. 9/20

10:00 am-6:16 pm

1 stop9h 16m

Boise Air Term. Gowen Fld

mar. 9/23

8:00 am-4:49 pm

1 stop7h 49m

$214

ChicagoBoise

MDW - BOI

MDWBOI

Chicago Midway

sáb. 8/16

7:17 pm-11:54 pm

1 stop5h 37m

Boise Air Term. Gowen Fld

mar. 8/19

5:30 am-1:03 pm

1 stop6h 33m

$215

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

sáb. 9/20

8:52 am-2:15 pm

1 stop6h 23m

Boise Air Term. Gowen Fld

sáb. 10/11

2:00 pm-11:47 pm

1 stop8h 47m

$215

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

sáb. 8/16

9:50 am-12:29 pm

Nonstop3h 39m

Boise Air Term. Gowen Fld

sáb. 8/23

1:10 pm-5:43 pm

Nonstop3h 33m

$216

ChicagoSpokane

ORD - GEG

ORDGEG

Chicago O'Hare Intl

sáb. 8/16

6:00 am-12:29 pm

1 stop8h 29m

Spokane

sáb. 8/23

12:14 pm-5:55 pm

Nonstop3h 41m

$227

ChicagoSpokane

MDW - GEG

MDWGEG

Chicago Midway

mié. 9/17

2:05 pm-10:30 pm

2 stops10h 25m

Spokane

dom. 9/21

1:15 pm-6:40 pm

Nonstop3h 25m

$230

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

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, October is the cheapest month in which you can book a flight from Illinois to Idaho (average of $314). Flying from Illinois to Idaho in June is currently the most expensive (average of $398). 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 julio 3, 2025.

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

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 julio 3, 2025.

The most flights from USIL to USID are scheduled on a Thursday (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 julio 3, 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
10,000 reviews

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,266 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,982 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.8
Good
2,545 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,861 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

  • 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 $69 on Frontier. Other airlines that offer cheap prices include Spirit Airlines from $90 and Hawaiian Airlines from $97 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, October is the cheapest month in which you can book a flight from Illinois to Idaho (average of $314). Flying from Illinois to Idaho in June is currently the most expensive (average of $398). 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 5 airlines flying from Illinois to Idaho

Discover the top 5 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 julio 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$174Average$413FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$227Average$337FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$237Average$518FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$254Average$348FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$270Average$561FlexibilityNo cancel feeOn-time69%

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