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$243+ 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 1/20. Fares are subject to change and may not be available on all flights or dates of travel.
CPR — ORD
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap flight deals from Casper to Illinois

Cheapest flights from Casper to Illinois
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 December 18, 2025.

This United Airlines deal was found by Cheapflights users on 12/15. 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 12/303:19 pmCPR - ORD
1 stop6h 41mUnited Airlines
Sat 1/31:48 pmORD - CPR
1 stop6h 13mUnited Airlines
Deal found 12/15$324
This United Airlines deal was found by Cheapflights users on 12/15. 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 12/279:05 amCPR - ORD
1 stop9h 55mUnited Airlines
Tue 12/3010:56 amORD - CPR
1 stop12h 29mUnited Airlines
Deal found 12/15$572
This United Airlines deal was found by Cheapflights users on 12/16. 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.
Wed 12/241:22 pmCPR - STL
1 stop8h 00mUnited Airlines
Mon 12/298:05 amSTL - CPR
2 stops15h 20mUnited Airlines
Deal found 12/16$579
This United Airlines deal was found by Cheapflights users on 12/16. 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.
Wed 12/241:22 pmCPR - STL
1 stop8h 00mUnited Airlines
Sun 12/286:35 pmSTL - CPR
2 stops17h 16mUnited Airlines
Deal found 12/16$782

Find flight deals from Casper to Illinois

Keep the following information in mind while searching for Casper to Illinois flight deals. Data was last updated December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$328
(United Airlines)

One-way from

$243
(United Airlines)
Provider with most accurate pricing for Casper Natrona County-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Casper Natrona County-Chicago (CHI) flights.
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From Casper Natrona County to Illinois
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One-way flight from Casper Natrona County to Illinois
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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 December 18, 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

Tue 12/30

3:19 pm-11:00 pm

1 stop6h 41m

Chicago O'Hare Intl

Sat 1/3

1:48 pm-7:01 pm

1 stop6h 13m

$324

CasperSt. Louis

CPR - STL

CPRSTL

Casper Natrona County

Sat 1/17

5:30 am-1:16 pm

1 stop6h 46m

Lambert-St Louis

Wed 1/21

2:45 pm-8:40 pm

1 stop6h 55m

$328

CasperChicago

CPR - ORD

CPRORD

Casper Natrona County

Fri 1/9

9:00 am-2:55 pm

1 stop4h 55m

Chicago O'Hare Intl

Tue 1/13

12:53 pm-7:06 pm

1 stop7h 13m

$338

CasperChicago

CPR - ORD

CPRORD

Casper Natrona County

Fri 1/23

9:00 am-6:46 pm

1 stop8h 46m

Chicago O'Hare Intl

Tue 1/27

1:55 pm-7:06 pm

1 stop6h 11m

$338

CasperChicago

CPR - ORD

CPRORD

Casper Natrona County

Sat 12/27

9:05 am-8:00 pm

1 stop9h 55m

Chicago O'Hare Intl

Tue 12/30

10:56 am-10:25 pm

1 stop12h 29m

$572

CasperSt. Louis

CPR - STL

CPRSTL

Casper Natrona County

Tue 1/20

3:17 pm-8:58 pm

1 stop4h 41m

$243

CasperChicago

CPR - ORD

CPRORD

Casper Natrona County

Wed 1/14

7:00 am-7:51 pm

1 stop11h 51m

$465

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

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
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 Casper to Illinois. 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 from for flights from Casper to Illinois?

    Casper Natrona County (CPR), located 8.1 mi from the city center, is the airport you fly out of when you book flights from Casper to Illinois.

  • How long is the flight from Casper to Illinois?

    A quick flight from Casper to Illinois can take about 6h 41m. United Airlines provides one of the quickest options available for as low as $324. Airlines will cover a distance of 946 mi.

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

    While some choose either Casper Natrona County - Lambert-St Louis or Casper Natrona County - Chicago Midway, Casper Natrona County - Chicago O'Hare Intl is the most popular route from Casper to Illinois.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Casper to Illinois 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

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