$304+ Cheap flights from Casper (CPR) 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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
CPR — ORD
Apr 22 — Apr 291
1 adult, Economy
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Find cheap flights from Casper 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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
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 Casper to Illinois
Keep the following information in mind while searching for Casper to Illinois flight deals. Data was last updated April 17, 2025.
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $395 (United Airlines) |
One-way from | $304 (United Airlines) |
Find flight deals from Casper to Illinois
Cheapest flights from Casper to IllinoisExplore the most affordable flight options available from Casper to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2025.
Explore the most affordable flight options available from Casper to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2025.
This United Airlines deal was found by Cheapflights users on 4/16. 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 5/11:30 pmCPR - ORD
1 stop6h 47mUnited Airlines
Mon 5/52:35 pmORD - CPR
1 stop6h 51mUnited Airlines
Deal found 4/16![United Airlines logo]()
$395
Cheapflights Fare Finder
Customize your flight search to find flights from Casper 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 April 17, 2025.
Use the filters below to find and compare flights from Casper to Illinois that are best for you.
Fly from
Casper
Fly to
Illinois
Route
Depart
Return
Price
CasperChicago
CPR - ORD
CPRORD
Casper Natrona County
Thu 5/1
1:30 pm-9:17 pm
1 stop6h 47m
Chicago O'Hare Intl
Mon 5/5
2:35 pm-8:26 pm
1 stop6h 51m
$395
CasperChicago
CPR - ORD
CPRORD
Casper Natrona County
Mon 5/5
6:10 pm-12:29 am
1 stop5h 19m
$304
Best time to book a flight from Casper to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Casper 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 Casper to Illinois
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 April 17, 2025.
Food
6.6
Comfort
7.3
Entertainment
7.0
Boarding
7.7
Overall
7.4
Crew
8.1
Reviews
1 / 20
2.0
MediocreDeb,Jan 2025
MKE - ORD
Food
6.6
Comfort
7.3
Entertainment
7.0
Boarding
7.7
Overall
7.4
Crew
8.1
Reviews
1 / 20
2.0
MediocreDeb,Jan 2025
MKE - ORD
Related info for your journey
Find useful and relevant information for your journey from Casper 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 Casper to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Top airline flying from Casper to Illinois
Discover the top airline that operate flights from Casper 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 April 17, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$318 | Average$391 | FlexibilityNo cancel fee | On-time69% |