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$66+ 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
Nov 26 — Dec 31
Tue 11/26
Tue 12/3
1 adult, Economy
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Cheap flight deals from Illinois to Idaho

Discover tips and strategies to find the most affordable flight options for your journey from Illinois (USIL) to Idaho (USID). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 21, 2024.

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 21, 2024.

This Delta deal was found by Cheapflights users on 11/20. 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.
Tue 12/314:50 pmMDW - BOI
1 stop8h 05mDelta
Tue 1/145:30 amBOI - MDW
1 stop6h 16mDelta
Deal found 11/20$248
This Delta deal was found by Cheapflights users on 11/20. 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.
Tue 12/107:10 pmORD - BOI
1 stop6h 33mDelta
Tue 12/171:43 pmBOI - ORD
1 stop9h 15mDelta
Deal found 11/20$248
This FlightHub deal was found by Cheapflights users on 11/20. 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.
Thu 12/59:53 pmORD - BOI
1 stop14h 05mSpirit Airlines
Sun 12/811:57 amBOI - ORD
1 stop25h 29mSpirit Airlines
Deal found 11/20$257
This Delta deal was found by Cheapflights users on 11/20. 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 12/162:10 pmORD - GEG
1 stop12h 00mDelta
Fri 1/35:05 amGEG - ORD
1 stop16h 54mDelta
Deal found 11/20$274
This Mytrip deal was found by Cheapflights users on 11/20. 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.
Fri 12/66:33 pmORD - BOI
2 stops21h 17mMultiple Airlines
Sun 12/810:50 pmBOI - ORD
1 stop14h 36mMultiple Airlines
Deal found 11/20$277
This United Airlines deal was found by Cheapflights users on 11/20. 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.
Sat 12/77:39 pmORD - BOI
Nonstop4h 05mUnited Airlines
Wed 12/115:26 pmBOI - ORD
1 stop5h 56mUnited Airlines
Deal found 11/20$279
This United Airlines deal was found by Cheapflights users on 11/21. 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.
Tue 12/178:45 amORD - GEG
1 stop8h 31mUnited Airlines
Sat 12/2811:59 pmGEG - ORD
Nonstop3h 42mUnited Airlines
Deal found 11/21$279
This Delta deal was found by Cheapflights users on 11/20. 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 12/187:20 amSTL - BOI
1 stop6h 00mDelta
Wed 12/255:32 amBOI - STL
1 stop8h 17mDelta
Deal found 11/20$300
This United Airlines deal was found by Cheapflights users on 11/20. 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 12/129:15 amORD - JAC
Nonstop3h 20mUnited Airlines
Tue 12/1712:45 pmJAC - ORD
Nonstop2h 58mUnited Airlines
Deal found 11/20$309
This Delta deal was found by Cheapflights users on 11/20. 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.
Thu 12/192:15 pmSTL - JAC
1 stop7h 51mDelta
Wed 12/251:15 pmJAC - STL
1 stop7h 19mDelta
Deal found 11/20$314
This United Airlines deal was found by Cheapflights users on 11/20. 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.
Fri 12/137:00 amSTL - BOI
1 stop10h 12mUnited Airlines
Sun 12/156:40 amBOI - STL
1 stop5h 03mUnited Airlines
Deal found 11/20$317
This Alaska Airlines deal was found by Cheapflights users on 11/20. 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.
Mon 12/166:32 amORD - GEG
1 stop16h 22mAlaska Airlines
Wed 1/15:00 amGEG - ORD
1 stop21h 40mAlaska Airlines
Deal found 11/20$328

Find flights from Illinois to Idaho within your budget

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 2,612,795 searches. Data last updated November 21, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

ChicagoSpokane

ORD - GEG

ORDGEG

Chicago O'Hare Intl

Tue 1/21

7:20 pm-11:57 pm

1 stop6h 37m

Spokane

Sat 1/25

5:00 am-1:15 pm

1 stop6h 15m

$237

ChicagoSpokane

ORD - GEG

ORDGEG

Chicago O'Hare Intl

Tue 1/21

6:55 pm-11:43 pm

1 stop6h 48m

Spokane

Sat 1/25

5:48 pm-1:07 pm

2 stops17h 19m

$241

ChicagoSpokane

MDW - GEG

MDWGEG

Chicago Midway

Tue 1/21

6:59 pm-10:51 pm

1 stop5h 52m

Spokane

Sat 1/25

5:35 am-5:47 pm

2 stops10h 12m

$243

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

Fri 1/17

2:10 pm-8:29 pm

1 stop7h 19m

Boise Air Term. Gowen Fld

Tue 1/21

5:30 am-6:25 pm

2 stops11h 55m

$246

ChicagoBoise

MDW - BOI

MDWBOI

Chicago Midway

Tue 12/31

4:50 pm-11:55 pm

1 stop8h 05m

Boise Air Term. Gowen Fld

Tue 1/14

5:30 am-12:46 pm

1 stop6h 16m

$248

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

Wed 1/8

9:00 am-12:20 pm

Nonstop4h 20m

Boise Air Term. Gowen Fld

Tue 1/14

12:15 pm-5:00 pm

Nonstop3h 45m

$249

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Sat 1/18

7:40 am-6:29 pm

2 stops11h 49m

Boise Air Term. Gowen Fld

Sat 1/25

10:40 am-9:33 pm

2 stops9h 53m

$253

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

Sun 1/5

9:54 pm-11:02 am

1 stop14h 08m

Boise Air Term. Gowen Fld

Sun 1/12

7:33 pm-5:30 am

1 stop8h 57m

$258

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

Fri 12/6

6:33 pm-2:50 pm

2 stops21h 17m

Boise Air Term. Gowen Fld

Sun 12/8

10:50 pm-2:26 pm

1 stop14h 36m

$277

ChicagoSpokane

ORD - GEG

ORDGEG

Chicago O'Hare Intl

Tue 12/17

8:45 am-3:16 pm

1 stop8h 31m

Spokane

Sat 12/28

11:59 pm-5:41 am

Nonstop3h 42m

$279

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/20

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.

Travel insights for flights from Illinois to Idaho

Get recent, data-driven insights about flights from Illinois to Idaho including ideal travel times, pricing trends, and more.

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

Currently, January is the cheapest month in which you can book a flight from Illinois to Idaho (average of $310). Flying from Illinois to Idaho in June is currently the most expensive (average of $436). 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 21, 2024.

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 November 21, 2024.

The most flights from USIL to USID are scheduled on a Monday (5 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (5 on average).

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 November 21, 2024.
Read reviews from past customers who have flown United Airlines, Spirit Airlines and Delta from Illinois to Idaho. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
5,005 reviews

Comfort

8.1

Boarding

8.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Southwest
8.1
Very good
5,005 reviews
Southwest
8.1
Very good
5,005 reviews

Comfort

8.1

Boarding

8.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Alaska Airlines
8.0
Very good
9,464 reviews
Southwest
8.1
Very good
5,005 reviews

Comfort

8.1

Boarding

8.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Delta
8.0
Very good
8,755 reviews
Southwest
8.1
Very good
5,005 reviews

Comfort

8.1

Boarding

8.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

United Airlines
7.4
Good
9,172 reviews
Southwest
8.1
Very good
5,005 reviews

Comfort

8.1

Boarding

8.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
5,005 reviews

Comfort

8.1

Boarding

8.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

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 $66 on Spirit Airlines. Other airlines that offer cheap prices include Delta from $114 and Alaska Airlines from $137 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, January is the cheapest month in which you can book a flight from Illinois to Idaho (average of $310). Flying from Illinois to Idaho in June is currently the most expensive (average of $436). 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

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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 2,612,795 searches. Data last updated November 21, 2024.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$115Average$239FlexibilityNo cancel feeOn-time65%
Alaska AirlinesCheapest$138Average$339FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$216Average$514FlexibilityNo cancel feeOn-time71%
DeltaCheapest$216Average$345FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$338Average$678FlexibilityNo cancel feeOn-time69%
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