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$403+ Cheap flights from Casper (CPR) to Illinois

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 2/13. Fares are subject to change and may not be available on all flights or dates of travel.
CPR — ORD
Dec 23 — Dec 301
Mon 12/23
Mon 12/30
1 adult, Economy
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Cheap flight deals from Casper to Illinois

Discover tips and strategies to find the most affordable flight options for your journey from Casper (CPR) to Illinois (USIL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 18, 2024.

Round-trip from

$403
(United)
From Casper Natrona County to Illinois
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Find 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, 2024.

This United deal was found by Cheapflights users on 12/17. 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.
Thu 12/191:36 pmCPR - STL
1 stop7h 40mUnited Airlines
Thu 1/21:44 pmSTL - CPR
1 stop9h 31mUnited Airlines
Deal found 12/17$539

Find flights from Casper to Illinois within your budget

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, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

CasperSt. Louis

CPR - STL

CPRSTL

Casper Natrona County

Thu 2/13

11:48 am-8:44 pm

1 stop7h 56m

Lambert-St Louis

Sat 2/15

8:20 am-4:55 pm

1 stop9h 35m

$403

CasperChicago

CPR - ORD

CPRORD

Casper Natrona County

Wed 1/1

1:36 pm-11:59 pm

1 stop9h 23m

Chicago O'Hare Intl

Sun 1/5

9:40 pm-12:47 pm

1 stop16h 07m

$597

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

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.

Travel insights for flights from Casper to Illinois

Get recent, data-driven insights about flights from Casper to Illinois including ideal travel times, pricing trends, and more.

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 December 18, 2024.
United Airlines
7.4
Good
9,059 reviews

Food

6.7

Entertainment

7.1

Crew

8.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Reviews

1 / 10

Good boarding process. (Nice to be able to buy Group 2 boarding option.) Plane was clean. Tried to avoid full flight by flying on Saturday, but plane was full anyway. Gate area in Houston should have charging options. Should be a lounge for people with American Express Platinum Card in Houston Airport.

United Airlines
7.4
Good
9,059 reviews
United Airlines
7.4
Good
9,059 reviews

Food

6.7

Entertainment

7.1

Crew

8.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Reviews

1 / 10

Good boarding process. (Nice to be able to buy Group 2 boarding option.) Plane was clean. Tried to avoid full flight by flying on Saturday, but plane was full anyway. Gate area in Houston should have charging options. Should be a lounge for people with American Express Platinum Card in Houston Airport.

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.

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

    While some choose either Casper Natrona County - Chicago O'Hare Intl or Casper Natrona County - Chicago Midway, Casper Natrona County - Lambert-St Louis 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.

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

    Currently, September is the cheapest month in which you can book a flight from Casper to Illinois (average of $232). Flying from Casper to Illinois in June is currently the most expensive (average of $308). 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.

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Alternative routes for Casper to Illinois

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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 December 18, 2024.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$317Average$463FlexibilityNo cancel feeOn-time69%
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