$308+ Cheap flights from Illinois to Casper (CPR)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — CPR
Aug 4 — Aug 111
1 adult, Economy
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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 Illinois to Casper
Keep the following information in mind while searching for Illinois to Casper flight deals. Data was last updated July 30, 2025.
Round-trip from | $308 (United Airlines) |
|---|
Find flight deals from Illinois to Casper
Cheapest flights from Illinois to CasperExplore the most affordable flight options available from Illinois to Casper. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 30, 2025.
Explore the most affordable flight options available from Illinois to Casper. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 30, 2025.
This United Airlines deal was found by Cheapflights users on 7/30. 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 10/141:40 pmSTL - CPR
1 stop9h 32mUnited Airlines
Sat 10/186:01 pmCPR - STL
1 stop4h 57mUnited Airlines
Deal found 7/30![United Airlines logo]()
$308
This United Airlines deal was found by Cheapflights users on 7/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/72:53 pmORD - CPR
1 stop8h 19mUnited Airlines
Sat 10/116:01 pmCPR - ORD
1 stop4h 58mUnited Airlines
Deal found 7/27![United Airlines logo]()
$318
Cheapflights Fare Finder
Customize your flight search to find flights from Illinois to Casper 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 July 30, 2025.
Use the filters below to find and compare flights from Illinois to Casper that are best for you.
Fly from
Illinois
Fly to
Casper
Route
Depart
Return
Price
St. LouisCasper
STL - CPR
STLCPR
Lambert-St Louis
Tue 10/14
1:40 pm-10:12 pm
1 stop9h 32m
Casper Natrona County
Sat 10/18
6:01 pm-11:58 pm
1 stop4h 57m
$308
ChicagoCasper
ORD - CPR
ORDCPR
Chicago O'Hare Intl
Tue 10/7
2:53 pm-10:12 pm
1 stop8h 19m
Casper Natrona County
Sat 10/11
6:01 pm-11:59 pm
1 stop4h 58m
$318
ChicagoCasper
ORD - CPR
ORDCPR
Chicago O'Hare Intl
Fri 8/15
6:35 pm-12:39 pm
1 stop19h 04m
$437
Best time to book a flight from Illinois to Casper
Have a flexible travel schedule? Discover the best time to fly to Casper 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 Casper
No data available for this route at this time. Please check back soon.
Reviews of airlines servicing Casper
Get insights into the airlines that provide service to Casper. 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 Casper. Reviews last updated July 30, 2025.
Read through reviews of airlines operating flights from Illinois to Casper, such as United Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.1
Boarding
7.7
Overall
7.4
Food
6.6
Comfort
7.3
Crew
8.1
Reviews
1 / 20
2.0
MediocreDeb,Jan 2025
MKE - ORD
Entertainment
7.1
Boarding
7.7
Overall
7.4
Food
6.6
Comfort
7.3
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 Illinois to Casper. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Casper?
Book flights to Casper if you plan to visit one of these locationsRawlins
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Alternative routes for Illinois to Casper
See prices for flight routes from nearby airports that may be better suited for you.
Top airline flying from Illinois to Casper
Discover the top airline that operate flights from Illinois to Casper. 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 July 30, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$248 | Average$414 | FlexibilityNo cancel fee | On-time69% |