$65+ Cheap flights from Idaho to Illinois
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 4/14. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — ORD
feb. 25 — mar. 41
1 adult, Economy
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Find cheap flights from Idaho to Illinois with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Idaho to Illinois
Keep the following information in mind while searching for Idaho to Illinois flight deals. Data was last updated febrero 20, 2025.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $206 (Delta) |
One-way from | $65 (FlightHub) |
Popular in | December |
Cheapest in | January |
Average price | $323 |
Good round-trip deal | $460 or less |
Good one-way deal | $209 or less |
Find flight deals from Idaho to Illinois
Cheapest flights from Idaho to IllinoisExplore the most affordable flight options available from Idaho to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on febrero 20, 2025.
Explore the most affordable flight options available from Idaho to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on febrero 20, 2025.
This Delta deal was found by Cheapflights users on 2/20. 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.
dom. 4/204:40 pmBOI - ORD
1 stop6h 19mDelta
sáb. 5/37:45 amORD - BOI
1 stop7h 45mDelta
Deal found 2/20![Delta logo]()
$206
This Mytrip deal was found by Cheapflights users on 2/19. 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.
mar. 3/111:31 pmBOI - ORD
1 stop16h 11mSpirit Airlines
dom. 3/167:47 amORD - BOI
1 stop29h 45mSpirit Airlines
Deal found 2/19![Spirit Airlines logo]()
$222
This Delta deal was found by Cheapflights users on 2/19. 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.
jue. 4/35:59 pmBOI - STL
1 stop5h 29mDelta
mié. 4/96:00 amSTL - BOI
1 stop7h 44mDelta
Deal found 2/19![Delta logo]()
$227
This Delta deal was found by Cheapflights users on 2/19. 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.
mar. 4/85:30 amBOI - MDW
1 stop7h 47mDelta
sáb. 4/127:13 pmMDW - BOI
1 stop5h 36mDelta
Deal found 2/19![Delta logo]()
$229
This Delta deal was found by Cheapflights users on 2/19. 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.
lun. 3/171:55 pmGEG - ORD
1 stop7h 58mDelta
mié. 3/266:15 amORD - GEG
1 stop8h 43mDelta
Deal found 2/19![Delta logo]()
$239
This Delta deal was found by Cheapflights users on 2/19. 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.
dom. 3/910:45 pmGEG - MDW
1 stop8h 24mDelta
mié. 3/127:09 pmMDW - GEG
1 stop5h 31mDelta
Deal found 2/19![Delta logo]()
$244
This Alaska Airlines deal was found by Cheapflights users on 2/19. 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.
vie. 8/2912:44 pmGEG - ORD
1 stop14h 20mAlaska Airlines
lun. 9/17:00 amORD - GEG
1 stop6h 50mAlaska Airlines
Deal found 2/19![Alaska Airlines logo]()
$248
This United Airlines deal was found by Cheapflights users on 2/19. 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.
jue. 3/208:30 amBOI - ORD
Nonstop3h 40mUnited Airlines
jue. 3/2710:50 amORD - BOI
1 stop8h 00mUnited Airlines
Deal found 2/19![United Airlines logo]()
$260
This Southwest deal was found by Cheapflights users on 2/19. 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.
jue. 3/65:30 amGEG - MDW
1 stop7h 05mSouthwest
mar. 3/115:00 pmMDW - GEG
1 stop8h 10mSouthwest
Deal found 2/19![Southwest logo]()
$264
This American Airlines deal was found by Cheapflights users on 2/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 6/51:40 pmGEG - ORD
Nonstop3h 51mAmerican Airlines
lun. 6/910:59 amORD - GEG
Nonstop4h 00mAmerican Airlines
Deal found 2/20![American Airlines logo]()
$269
This Mytrip deal was found by Cheapflights users on 2/20. 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.
vie. 3/79:30 pmBOI - ORD
2 stops30h 56mMultiple Airlines
mié. 3/129:16 amORD - BOI
2 stops28h 16mMultiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$276
This Southwest deal was found by Cheapflights users on 2/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 5/1010:35 amBOI - MDW
1 stop7h 15mSouthwest
mar. 5/138:40 amMDW - BOI
1 stop6h 45mSouthwest
Deal found 2/20![Southwest logo]()
$284
Find flights from Idaho to Illinois within your budget
Customize your flight search to find flights from Idaho to Illinois 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 febrero 20, 2025.
Fly from
Idaho
Fly to
Illinois
Route
Depart
Return
Price
BoiseChicago
BOI - ORD
BOIORD
Boise Air Term. Gowen Fld
dom. 4/20
4:40 pm-11:59 pm
1 stop6h 19m
Chicago O'Hare Intl
sáb. 5/3
7:45 am-2:30 pm
1 stop7h 45m
$206
BoiseChicago
BOI - ORD
BOIORD
Boise Air Term. Gowen Fld
mar. 3/11
1:31 pm-6:42 am
1 stop16h 11m
Chicago O'Hare Intl
dom. 3/16
7:47 am-12:32 pm
1 stop29h 45m
$222
BoiseSt. Louis
BOI - STL
BOISTL
Boise Air Term. Gowen Fld
jue. 4/3
5:59 pm-12:28 am
1 stop5h 29m
Lambert-St Louis
mié. 4/9
6:00 am-12:44 pm
1 stop7h 44m
$227
BoiseChicago
BOI - MDW
BOIMDW
Boise Air Term. Gowen Fld
mar. 4/8
5:30 am-2:17 pm
1 stop7h 47m
Chicago Midway
sáb. 4/12
7:13 pm-11:49 pm
1 stop5h 36m
$229
SpokaneChicago
GEG - MDW
GEGMDW
Spokane
vie. 4/11
10:45 pm-9:07 am
1 stop8h 22m
Chicago Midway
vie. 4/18
6:04 am-11:48 am
1 stop7h 44m
$239
SpokaneChicago
GEG - ORD
GEGORD
Spokane
vie. 4/11
2:00 pm-9:45 pm
1 stop5h 45m
Chicago O'Hare Intl
jue. 4/17
8:50 am-1:05 pm
1 stop6h 15m
$239
BoiseChicago
BOI - ORD
BOIORD
Boise Air Term. Gowen Fld
jue. 3/20
8:30 am-1:10 pm
Nonstop3h 40m
Chicago O'Hare Intl
jue. 3/27
10:50 am-5:50 pm
1 stop8h 00m
$260
SpokaneChicago
GEG - MDW
GEGMDW
Spokane
jue. 3/6
5:30 am-2:35 pm
1 stop7h 05m
Chicago Midway
mar. 3/11
5:00 pm-11:10 pm
1 stop8h 10m
$264
SpokaneChicago
GEG - ORD
GEGORD
Spokane
jue. 6/5
1:40 pm-7:31 pm
Nonstop3h 51m
Chicago O'Hare Intl
lun. 6/9
10:59 am-12:59 pm
Nonstop4h 00m
$269
BoiseChicago
BOI - ORD
BOIORD
Boise Air Term. Gowen Fld
vie. 3/7
9:30 pm-5:26 am
2 stops30h 56m
Chicago O'Hare Intl
mié. 3/12
9:16 am-12:32 pm
2 stops28h 16m
$276
Showing 1-10 of 60 results
Best time to book a flight from Idaho to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Idaho 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 Idaho to Illinois
Get recent, data-driven insights about flights from Idaho to Illinois including ideal travel times, pricing trends, and more.
What is the cheapest month to book a flight from Idaho to Illinois?
Currently, August is the cheapest month in which you can book a flight from Idaho to Illinois (average of $245). Flying from Idaho to Illinois in March is currently the most expensive (average of $321). 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 ID to IL?
Find hourly flight availability from Idaho to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated febrero 20, 2025.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Idaho to Illinois as you normally would.
Weekly flight availability from Idaho to Illinois
Explore weekly flight availability from Idaho to Illinois. 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 febrero 20, 2025.
The most flights from USID to USIL are scheduled on a Monday (7 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (5 on average).
Rainfall in Illinois by month
Plan your trip to Illinois by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.
Temperature in Illinois by month
Plan your trip to Illinois by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Illinois, 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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated febrero 20, 2025.
Read through reviews of airlines operating flights from Idaho to Illinois, such as Southwest, Alaska Airlines and Delta. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.2
Entertainment
7.6
Comfort
8.1
Crew
8.7
Food
7.1
Overall
8.1
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Boarding
8.2
Entertainment
7.6
Comfort
8.1
Crew
8.7
Food
7.1
Overall
8.1
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Boarding
8.2
Entertainment
7.6
Comfort
8.1
Crew
8.7
Food
7.1
Overall
8.1
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Boarding
8.2
Entertainment
7.6
Comfort
8.1
Crew
8.7
Food
7.1
Overall
8.1
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Boarding
8.2
Entertainment
7.6
Comfort
8.1
Crew
8.7
Food
7.1
Overall
8.1
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Boarding
8.2
Entertainment
7.6
Comfort
8.1
Crew
8.7
Food
7.1
Overall
8.1
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Related info for your journey
Find useful and relevant information for your journey from Idaho to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Idaho to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Top 6 airlines flying from Idaho to Illinois
Discover the top 6 airlines that operate flights from Idaho to Illinois. 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 febrero 20, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$114 | Average$208 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$185 | Average$412 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$217 | Average$353 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$228 | Average$551 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$258 | Average$384 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$290 | Average$600 | FlexibilityNo cancel fee | On-time69% |