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$298+ 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 11/14. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — CPR
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Find flight deals from Illinois to Casper

Cheapest flights from Illinois to Casper
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 October 30, 2025.

This United Airlines deal was found by Cheapflights users on 10/30. 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.
Fri 11/142:40 pmORD - CPR
1 stop6h 37mUnited Airlines
Tue 11/183:18 pmCPR - ORD
1 stop6h 32mUnited Airlines
Deal found 10/30$298
This United Airlines deal was found by Cheapflights users on 10/28. 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.
Mon 11/34:43 pmSTL - CPR
1 stop4h 34mUnited Airlines
Thu 11/131:25 pmCPR - STL
1 stop7h 29mUnited Airlines
Deal found 10/28$313
This United Airlines deal was found by Cheapflights users on 10/30. 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.
Thu 11/61:00 pmORD - CPR
1 stop4h 53mUnited Airlines
Sun 12/75:58 pmCPR - ORD
1 stop5h 01mUnited Airlines
Deal found 10/30$340
This United Airlines deal was found by Cheapflights users on 10/28. 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 11/410:00 amSTL - CPR
2 stops7h 53mUnited Airlines
Thu 11/131:25 pmCPR - STL
2 stops8h 20mUnited Airlines
Deal found 10/28$359
This United Airlines deal was found by Cheapflights users on 10/28. 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 11/49:00 amSTL - CPR
1 stop4h 31mUnited Airlines
Fri 11/147:00 amCPR - STL
1 stop8h 28mUnited Airlines
Deal found 10/28$368
This United Airlines deal was found by Cheapflights users on 10/28. 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.
Mon 11/39:00 amSTL - CPR
1 stop6h 41mUnited Airlines
Fri 11/143:18 pmCPR - STL
1 stop5h 36mUnited Airlines
Deal found 10/28$383
This United Airlines deal was found by Cheapflights users on 10/29. 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 11/19:00 amSTL - CPR
1 stop6h 41mUnited Airlines
Wed 11/51:25 pmCPR - STL
1 stop7h 29mUnited Airlines
Deal found 10/29$413

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 October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$298
(United Airlines)
Provider with most accurate pricing for Chicago (CHI)-Casper Natrona County flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Casper Natrona County flights.
Search Deals
From Illinois to Casper Natrona County
Search Deals

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 October 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

ChicagoCasper

ORD - CPR

ORDCPR

Chicago O'Hare Intl

Fri 11/14

2:40 pm-8:17 pm

1 stop6h 37m

Casper Natrona County

Tue 11/18

3:18 pm-10:50 pm

1 stop6h 32m

$298

ChicagoCasper

ORD - CPR

ORDCPR

Chicago O'Hare Intl

Thu 11/6

1:00 pm-4:53 pm

1 stop4h 53m

Casper Natrona County

Sun 12/7

5:58 pm-11:59 pm

1 stop5h 01m

$340

St. LouisCasper

STL - CPR

STLCPR

Lambert-St Louis

Sat 4/4

8:00 am-8:12 pm

2 stops13h 12m

Casper Natrona County

Wed 4/8

1:25 pm-8:59 pm

1 stop6h 34m

$349

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

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.

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.

  • What airport do you fly into for flights to Casper from Illinois?

    Most people fly into Casper Natrona County (CPR) if they book a flight to Casper from Illinois. Natrona County is conveniently located just 8.1 mi from Casper’s city center.

  • How long is the flight from Illinois to Casper?

    For as low as $298, United Airlines can have you in Casper from Illinois in 6h 37m. Illinois and Casper are separated by a distance of 946 mi.

  • What are the most popular routes from Illinois to Casper?

    The most popular route from Illinois to Casper is Chicago O'Hare Intl - Casper Natrona County. You may also consider Lambert-St Louis - Casper Natrona County or Chicago Midway - Casper Natrona County.

  • Can I find deals for flights from Illinois to Casper that include hotel bookings?

    Yes. In addition to deals on Illinois to Casper flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Casper?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Casper.

  • Can I find deals for business class flights from Illinois to Casper?

    Yes. Cheapflights offers flight deals from Illinois to Casper by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near Casper?

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Rawlins

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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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$248Average$373FlexibilityNo cancel feeOn-time69%

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