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Idaho

$78+ 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 6/7. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BOI
May 5 — May 121
Mon 5/5
Mon 5/12
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 April 30, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$195
(Delta)

One-way from

$78
(United Airlines)

Popular in

November

Cheapest in

September

Average price

$377

Good round-trip deal

$322 or less

Good one-way deal

$153 or less
Provider with most accurate pricing for Chicago (CHI)-Boise Air Term. Gowen Fld flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Boise Air Term. Gowen Fld flights.
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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. 10% potential increase in price ($49 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 30, 2025.

This Delta deal was found by Cheapflights users on 4/28. 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 6/145:37 pmORD - GEG
1 stop7h 34mDelta
Wed 6/2511:10 pmGEG - ORD
1 stop8h 59mDelta
Deal found 4/28$195
This Delta deal was found by Cheapflights users on 4/28. 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 6/147:21 pmMDW - GEG
1 stop5h 50mDelta
Tue 6/2411:10 pmGEG - MDW
1 stop8h 31mDelta
Deal found 4/28$195
This United Airlines deal was found by Cheapflights users on 4/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/298:45 amORD - BOI
Nonstop3h 58mUnited Airlines
Mon 6/22:31 pmBOI - ORD
1 stop9h 28mUnited Airlines
Deal found 4/29$201
This Alaska Airlines deal was found by Cheapflights users on 4/29. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/176:20 amORD - BOI
1 stop9h 40mAlaska Airlines
Sun 9/215:45 pmBOI - ORD
1 stop12h 18mAlaska Airlines
Deal found 4/29$210
This Delta deal was found by Cheapflights users on 4/29. 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.
Wed 5/146:20 pmORD - BOI
1 stop6h 52mDelta
Tue 5/2012:50 pmBOI - ORD
1 stop7h 50mDelta
Deal found 4/29$211
This Southwest deal was found by Cheapflights users on 4/29. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/35:25 pmORD - BOI
1 stop8h 15mSouthwest
Mon 10/61:05 pmBOI - ORD
1 stop8h 15mSouthwest
Deal found 4/29$215
This Delta deal was found by Cheapflights users on 4/29. 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.
Wed 7/239:19 amMDW - BOI
1 stop5h 53mDelta
Sun 8/35:20 amBOI - MDW
1 stop6h 46mDelta
Deal found 4/29$217
This Southwest deal was found by Cheapflights users on 4/28. 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 8/301:35 pmMDW - GEG
1 stop9h 05mSouthwest
Tue 9/26:15 amGEG - MDW
1 stop7h 50mSouthwest
Deal found 4/28$225
This American Airlines deal was found by Cheapflights users on 4/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/3010:30 amORD - GEG
Nonstop3h 52mAmerican Airlines
Tue 9/21:11 pmGEG - ORD
Nonstop3h 39mAmerican Airlines
Deal found 4/29$235
This Southwest deal was found by Cheapflights users on 4/27. 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 6/35:35 amMDW - BOI
1 stop7h 35mSouthwest
Sat 6/74:45 pmBOI - MDW
1 stop5h 35mSouthwest
Deal found 4/27$240
This Delta deal was found by Cheapflights users on 4/28. 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.
Mon 6/21:40 pmORD - JAC
1 stop8h 08mDelta
Sat 6/77:30 amJAC - ORD
1 stop5h 40mDelta
Deal found 4/28$240
This Mytrip deal was found by Cheapflights users on 4/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/298:37 amORD - BOI
2 stops27h 44mSpirit Airlines
Mon 6/212:16 pmBOI - ORD
1 stop21h 39mSpirit Airlines
Deal found 4/29$248

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 April 30, 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 6/14

7:40 am-11:59 am

1 stop6h 19m

Spokane

Tue 6/24

11:10 pm-10:09 am

1 stop8h 59m

$195

ChicagoSpokane

MDW - GEG

MDWGEG

Chicago Midway

Sat 6/14

9:21 am-1:17 pm

1 stop5h 56m

Spokane

Tue 6/24

11:10 pm-9:41 am

1 stop8h 31m

$195

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

Thu 5/29

8:45 am-11:43 am

Nonstop3h 58m

Boise Air Term. Gowen Fld

Mon 6/2

2:31 pm-12:59 am

1 stop9h 28m

$201

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

Wed 5/14

6:20 pm-12:12 am

1 stop6h 52m

Boise Air Term. Gowen Fld

Tue 5/20

12:50 pm-9:40 pm

1 stop7h 50m

$211

ChicagoBoise

MDW - BOI

MDWBOI

Chicago Midway

Wed 7/23

7:21 pm-11:59 pm

1 stop5h 38m

Boise Air Term. Gowen Fld

Sun 8/3

5:20 am-1:06 pm

1 stop6h 46m

$217

ChicagoSpokane

ORD - GEG

ORDGEG

Chicago O'Hare Intl

Sat 6/7

10:55 am-1:11 pm

Nonstop4h 16m

Spokane

Sat 6/14

1:51 pm-7:35 pm

Nonstop3h 44m

$235

ChicagoBoise

MDW - BOI

MDWBOI

Chicago Midway

Tue 6/3

5:35 am-12:10 pm

1 stop7h 35m

Boise Air Term. Gowen Fld

Sat 6/7

4:45 pm-11:20 pm

1 stop5h 35m

$240

ChicagoJackson

ORD - JAC

ORDJAC

Chicago O'Hare Intl

Mon 6/2

1:40 pm-8:48 pm

1 stop8h 08m

Jackson Hole

Sat 6/7

7:30 am-2:10 pm

1 stop5h 40m

$240

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

Thu 5/29

8:37 am-11:21 am

2 stops27h 44m

Boise Air Term. Gowen Fld

Mon 6/2

12:16 pm-10:55 am

1 stop21h 39m

$248

ChicagoSpokane

ORD - GEG

ORDGEG

Chicago O'Hare Intl

Fri 6/20

3:09 pm-10:56 pm

1 stop9h 47m

Spokane

Tue 6/24

8:48 pm-5:40 am

1 stop6h 52m

$258

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

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 $406). 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 April 30, 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.

Rainfall in Idaho by month

Plan your trip to Idaho by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Idaho 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 Idaho when rainfall is around 0.2 in.

Temperature in Idaho by month

Plan your trip to Idaho by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Idaho, 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 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 April 30, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest and Delta from Illinois to Idaho. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,968 reviews

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Boarding

8.2

Overall

8.0

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
9,968 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Boarding

8.2

Overall

8.0

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
4,295 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Boarding

8.2

Overall

8.0

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
7,936 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,402 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Boarding

8.2

Overall

8.0

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
8,696 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Boarding

8.2

Overall

8.0

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 $78 on United Airlines. Other airlines that offer cheap prices include Alaska Airlines from $87 and Delta from $88 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 $406). 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 Idaho

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 Idaho

Discover the top 6 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 April 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$129Average$231FlexibilityNo cancel feeOn-time65%
DeltaCheapest$174Average$381FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$204Average$338FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$237Average$464FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$258Average$348FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$287Average$553FlexibilityNo cancel feeOn-time69%

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