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Casper

$318+ 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 5/9. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — CPR
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
1 adult, Economy
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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 March 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$318
(United Airlines)
Provider with most accurate pricing for Chicago (CHI)-Casper Natrona County flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Casper Natrona County flights.
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From Illinois to Casper Natrona County
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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 March 28, 2025.

This United Airlines deal was found by Cheapflights users on 3/27. 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.
Fri 5/97:10 amORD - CPR
1 stop6h 31mUnited Airlines
Sun 5/111:30 pmCPR - ORD
1 stop6h 47mUnited Airlines
Deal found 3/27$318
This United deal was found by Cheapflights users on 3/27. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/41:43 pmSTL - CPR
1 stop4h 56mUnited Airlines
Sun 4/61:30 pmCPR - STL
1 stop7h 20mUnited Airlines
Deal found 3/27$368

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 March 28, 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 5/9

7:10 am-12:41 pm

1 stop6h 31m

Casper Natrona County

Sun 5/11

1:30 pm-9:17 pm

1 stop6h 47m

$318

St. LouisCasper

STL - CPR

STLCPR

Lambert-St Louis

Fri 4/4

1:43 pm-5:39 pm

1 stop4h 56m

Casper Natrona County

Sun 4/6

1:30 pm-9:50 pm

1 stop7h 20m

$368

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

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

What is the cheapest time of day to fly from IL to CPR?

Find hourly flight availability from Illinois to Casper. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 28, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Casper as you normally would.

Rainfall in Casper by month

Plan your trip to Casper by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Casper ranges from 0.5 - 2.0 inches per month. May is typically the wettest month, when rainfall can reach 2.0 in. January is typically the driest time to visit Casper when rainfall is around 0.5 in.

Temperature in Casper by month

Plan your trip to Casper by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Casper, 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 69.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 23.0 F).

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 March 28, 2025.
United Airlines
7.4
Good
8,603 reviews

Boarding

7.7

Comfort

7.3

Food

6.6

Entertainment

7.0

Overall

7.4

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
8,603 reviews
United Airlines
7.4
Good
8,603 reviews

Boarding

7.7

Comfort

7.3

Food

6.6

Entertainment

7.0

Overall

7.4

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

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.

  • 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.

  • What is the cheapest month to book a flight from Illinois to Casper?

    Currently, January is the cheapest month in which you can book a flight from Illinois to Casper (average of $348). Flying from Illinois to Casper in June is currently the most expensive (average of $552). 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.

See more FAQs

Traveling to a place near Illinois?

Book flights to Illinois if you plan to visit one of these locations
Rawlins
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Alternative routes for Illinois to Casper

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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 March 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$278Average$474FlexibilityNo cancel feeOn-time69%
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