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$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 12/11. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BOI
dic. 13 — dic. 201
sáb. 12/13
sáb. 12/20
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 noviembre 13, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/12. 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.
vie. 12/1912:26 pmORD - GEG
2 stops24h 41mFrontier
sáb. 12/2712:02 pmGEG - ORD
1 stop10h 10mFrontier
Deal found 11/12$190
This Kiwi.com deal was found by Cheapflights users on 11/12. 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.
lun. 11/2412:29 pmORD - GEG
2 stops24h 56mFrontier
jue. 12/412:08 pmGEG - ORD
1 stop10h 04mFrontier
Deal found 11/12$197
This Orbitz deal was found by Cheapflights users on 11/11. 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.
sáb. 12/63:35 pmORD - GEG
1 stop7h 53mMultiple Airlines
jue. 12/1112:08 pmGEG - ORD
1 stop10h 04mMultiple Airlines
Deal found 11/11$200
This Kiwi.com deal was found by Cheapflights users on 11/12. 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.
jue. 11/273:37 pmORD - GEG
2 stops21h 48mFrontier
jue. 12/412:08 pmGEG - ORD
1 stop10h 04mFrontier
Deal found 11/12$202
This Alaska Airlines deal was found by Cheapflights users on 11/12. 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.
mié. 12/35:51 pmORD - GEG
1 stop8h 33mAlaska Airlines
mar. 3/3111:35 amGEG - ORD
1 stop10h 23mAlaska Airlines
Deal found 11/12$225
This Kiwi.com deal was found by Cheapflights users on 11/12. 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.
sáb. 12/69:06 pmORD - IDA
2 stops42h 30mMultiple Airlines
dom. 12/144:39 pmIDA - ORD
1 stop18h 03mMultiple Airlines
Deal found 11/12$233
This Kiwi.com deal was found by Cheapflights users on 11/12. 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.
mié. 12/104:01 pmORD - IDA
2 stops24h 48mMultiple Airlines
dom. 12/144:39 pmIDA - ORD
1 stop18h 03mMultiple Airlines
Deal found 11/12$239
This KAYAK deal was found by Cheapflights users on 11/11. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/55:51 pmORD - GEG
1 stop8h 33mAlaska Airlines
lun. 12/87:00 amGEG - ORD
1 stop10h 54mAlaska Airlines
Deal found 11/11$242
This Kiwi.com deal was found by Cheapflights users on 11/11. 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.
jue. 12/259:33 pmORD - GEG
2 stops39h 34mFrontier
mar. 12/3012:02 pmGEG - ORD
1 stop10h 10mFrontier
Deal found 11/11$243
This Kiwi.com deal was found by Cheapflights users on 11/12. 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.
dom. 12/76:50 amORD - IDA
2 stops32h 46mMultiple Airlines
dom. 12/144:39 pmIDA - ORD
1 stop18h 03mMultiple Airlines
Deal found 11/12$245
This Alaska Airlines deal was found by Cheapflights users on 11/12. 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.
jue. 11/277:00 amORD - GEG
1 stop6h 38mAlaska Airlines
mié. 12/31:33 pmGEG - ORD
1 stop8h 26mAlaska Airlines
Deal found 11/12$246
This Kiwi.com deal was found by Cheapflights users on 11/12. 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.
jue. 12/119:14 pmORD - IDA
2 stops17h 02mMultiple Airlines
dom. 12/144:39 pmIDA - ORD
1 stop18h 03mMultiple Airlines
Deal found 11/12$253

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 noviembre 13, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$190
(Kiwi.com)

One-way from

$65
(Frontier)

Popular in

December

Cheapest in

September

Average price

$454

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. 11% potential increase in price ($50 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 noviembre 13, 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

mar. 12/9

8:00 am-2:23 pm

1 stop8h 23m

Spokane

mar. 12/16

1:33 pm-11:59 pm

1 stop8h 26m

$225

ChicagoHailey

ORD - SUN

ORDSUN

Chicago O'Hare Intl

mié. 1/21

7:20 am-2:42 pm

1 stop8h 22m

Hailey Sun Valley-Friedman

sáb. 1/24

3:24 pm-9:52 pm

1 stop5h 28m

$226

ChicagoSpokane

ORD - GEG

ORDGEG

Chicago O'Hare Intl

mié. 12/3

3:35 pm-9:28 pm

1 stop7h 53m

Spokane

mar. 3/31

1:40 pm-11:58 pm

1 stop8h 18m

$236

ChicagoHailey

ORD - SUN

ORDSUN

Chicago O'Hare Intl

mar. 1/6

8:45 am-12:02 pm

Nonstop4h 17m

Hailey Sun Valley-Friedman

vie. 1/9

12:43 pm-5:24 pm

Nonstop3h 41m

$244

ChicagoSpokane

ORD - GEG

ORDGEG

Chicago O'Hare Intl

mar. 1/20

8:45 am-3:21 pm

1 stop8h 36m

Spokane

sáb. 1/24

11:25 am-5:10 pm

Nonstop3h 45m

$245

ChicagoSpokane

ORD - GEG

ORDGEG

Chicago O'Hare Intl

jue. 12/11

3:05 pm-11:59 pm

1 stop10h 54m

Spokane

jue. 12/18

12:33 pm-5:02 am

1 stop14h 29m

$248

ChicagoSpokane

ORD - GEG

ORDGEG

Chicago O'Hare Intl

vie. 12/5

5:51 pm-11:14 pm

1 stop7h 23m

Spokane

lun. 12/8

9:00 am-10:30 pm

1 stop11h 30m

$248

ChicagoHailey

ORD - SUN

ORDSUN

Chicago O'Hare Intl

mié. 1/21

8:45 am-12:02 pm

Nonstop4h 17m

Hailey Sun Valley-Friedman

sáb. 1/24

12:43 pm-5:24 pm

Nonstop3h 41m

$253

ChicagoSpokane

ORD - GEG

ORDGEG

Chicago O'Hare Intl

sáb. 12/13

3:05 pm-11:59 pm

1 stop10h 54m

Spokane

lun. 12/15

7:00 am-7:54 pm

1 stop10h 54m

$262

ChicagoSpokane

ORD - GEG

ORDGEG

Chicago O'Hare Intl

vie. 12/12

5:51 pm-11:14 pm

1 stop7h 23m

Spokane

lun. 12/15

7:00 am-7:54 pm

1 stop10h 54m

$262

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/11

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 $147). 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 noviembre 13, 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 noviembre 13, 2025.

The most flights from USIL to USID are scheduled on a Thursday (7 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (6 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 noviembre 13, 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
11,288 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Crew

8.5

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
11,288 reviews
Alaska Airlines
8.0
Very good
11,288 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Crew

8.5

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
4,242 reviews
Alaska Airlines
8.0
Very good
11,288 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Crew

8.5

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
8,007 reviews
Alaska Airlines
8.0
Very good
11,288 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Crew

8.5

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
9,017 reviews
Alaska Airlines
8.0
Very good
11,288 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Crew

8.5

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
11,051 reviews
Alaska Airlines
8.0
Very good
11,288 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Crew

8.5

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 4h 17m. Fly via Alaska Airlines, Delta, or United Airlines to get the fastest option. Illinois and Idaho are separated by a distance of 1337 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 $106 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 $147). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 noviembre 13, 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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