When did momondo last update prices for flights from Casper Natrona County Airport to Illinois?

Prices for flights from Casper Natrona County Airport to Illinois are updated daily.

How many operators does momondo search for flights from Casper Natrona County Airport to Illinois?

There is 1 operator available for flights from Casper Natrona County Airport to Illinois as of September 2025.

How old do you have to be to fly from Casper Natrona County Airport to Illinois?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Casper Natrona County Airport to Illinois.

What documentation or ID do you need to fly to Illinois?

The travel and health documents you'll need for your trip to Illinois may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Illinois. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$278 Cheap Flights from Casper to Illinois in 2025

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Find the cheapest flights from Casper to Illinois

Round-trip

Cheap round-trip flights

1:37 pm - 8:41 pmCPR-ORD

6h 04m1 stop

5:01 am - 10:47 amORD-CPR

6h 46m1 stop

$278United Airlines

Find Deal

Wed, Sep 24 - Sun, Sep 28

1:25 pm - 11:57 pmCPR-ORD

9h 32m1 stop

7:15 am - 2:40 pmORD-CPR

8h 25m1 stop

$318United Airlines

Find Deal

Sat, Feb 28 - Wed, Mar 4

1:25 pm - 8:59 pmCPR-STL

6h 34m1 stop

1:30 pm - 5:04 pmSTL-CPR

4h 34m1 stop

$338United Airlines

Find Deal

Sat, Mar 7 - Wed, Mar 11

6:01 pm - 10:09 amCPR-STL

15h 08m2 stops

9:13 am - 12:35 pmSTL-CPR

4h 22m1 stop

$344United Airlines

Find Deal

Sat, Mar 7 - Wed, Mar 11

3:11 pm - 9:32 pmCPR-ORD

5h 21m1 stop

2:17 pm - 6:47 pmORD-CPR

5h 30m1 stop

$348United Airlines

Find Deal

Tue, Sep 23 - Sat, Sep 27

6:01 pm - 11:57 pmCPR-ORD

4h 56m1 stop

10:35 am - 10:12 pmORD-CPR

12h 37m2 stops

$384United Airlines

Find Deal

Sat, Feb 28 - Wed, Mar 4

7:00 am - 8:09 pmCPR-ORD

12h 09m2 stops

7:15 am - 2:40 pmORD-CPR

8h 25m1 stop

$454United Airlines

Find Deal

Sat, Feb 28 - Wed, Mar 4

5:30 am - 5:01 pmCPR-ORD

10h 31m2 stops

5:01 am - 10:47 amORD-CPR

6h 46m1 stop

$460United Airlines

Find Deal

Wed, Sep 24 - Sun, Sep 28

6:05 pm - 11:59 pmCPR-ORD

4h 54m1 stop

9:30 pm - 10:46 amORD-CPR

14h 16m1 stop

$492United Airlines

Find Deal

Wed, Nov 26 - Mon, Dec 1

3:18 pm - 9:49 pmCPR-STL

5h 31m1 stop

6:30 am - 7:17 pmSTL-CPR

13h 47m2 stops

$499United Airlines

Find Deal

Sat, Nov 22 - Fri, Nov 28

United Airlines flights from Casper to Illinois

Our best United Airlines deals on Casper to Illinois flight tickets

United Airlines

Sep 24

CPR1:37 pmCasper Natrona County

6h 04m

1 stop

ORD8:41 pmChicago O'Hare Intl

Sep 28

ORD5:01 amChicago O'Hare Intl

6h 46m

1 stop

CPR10:47 amCasper Natrona County

$278

Find similar

United Airlines

Feb 28

CPR1:25 pmCasper Natrona County

9h 32m

1 stop

ORD11:57 pmChicago O'Hare Intl

Mar 4

ORD7:15 amChicago O'Hare Intl

8h 25m

1 stop

CPR2:40 pmCasper Natrona County

$318

Find similar

United Airlines

Mar 7

CPR1:25 pmCasper Natrona County

6h 34m

1 stop

STL8:59 pmLambert-St Louis

Mar 11

STL1:30 pmLambert-St Louis

4h 34m

1 stop

CPR5:04 pmCasper Natrona County

$338

Find similar

Fly from

Fly to

Route

Depart

Return

Price

CasperChicago

CPR - ORD

CPRORD

Casper Natrona County

Wed 9/24

1:37 pm-8:41 pm

1 stop6h 04m

Chicago O'Hare Intl

Sun 9/28

5:01 am-10:47 am

1 stop6h 46m

$278

CasperChicago

CPR - ORD

CPRORD

Casper Natrona County

Sat 2/28

1:25 pm-11:57 pm

1 stop9h 32m

Chicago O'Hare Intl

Wed 3/4

7:15 am-2:40 pm

1 stop8h 25m

$318

CasperSt. Louis

CPR - STL

CPRSTL

Casper Natrona County

Sat 3/7

1:25 pm-8:59 pm

1 stop6h 34m

Lambert-St Louis

Wed 3/11

1:30 pm-5:04 pm

1 stop4h 34m

$338

CasperSt. Louis

CPR - STL

CPRSTL

Casper Natrona County

Sat 3/7

6:01 pm-10:09 am

2 stops15h 08m

Lambert-St Louis

Wed 3/11

9:13 am-12:35 pm

1 stop4h 22m

$344

CasperChicago

CPR - ORD

CPRORD

Casper Natrona County

Tue 9/23

3:11 pm-9:32 pm

1 stop5h 21m

Chicago O'Hare Intl

Sat 9/27

2:17 pm-6:47 pm

1 stop5h 30m

$348

CasperChicago

CPR - ORD

CPRORD

Casper Natrona County

Sat 2/28

6:01 pm-11:57 pm

1 stop4h 56m

Chicago O'Hare Intl

Wed 3/4

10:35 am-10:12 pm

2 stops12h 37m

$384

CasperChicago

CPR - ORD

CPRORD

Casper Natrona County

Sat 2/28

7:00 am-8:09 pm

2 stops12h 09m

Chicago O'Hare Intl

Wed 3/4

7:15 am-2:40 pm

1 stop8h 25m

$454

CasperChicago

CPR - ORD

CPRORD

Casper Natrona County

Wed 9/24

5:30 am-5:01 pm

2 stops10h 31m

Chicago O'Hare Intl

Sun 9/28

5:01 am-10:47 am

1 stop6h 46m

$460

CasperChicago

CPR - ORD

CPRORD

Casper Natrona County

Wed 11/26

6:05 pm-11:59 pm

1 stop4h 54m

Chicago O'Hare Intl

Mon 12/1

9:30 pm-10:46 am

1 stop14h 16m

$492

CasperSt. Louis

CPR - STL

CPRSTL

Casper Natrona County

Sat 11/22

3:18 pm-9:49 pm

1 stop5h 31m

Lambert-St Louis

Fri 11/28

6:30 am-7:17 pm

2 stops13h 47m

$499

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from Casper to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Casper to Illinois is on a Saturday when prices can be found for as low as $328. Flights from Casper to Illinois on a Friday will generally be more expensive and average around $485. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from Casper to Illinois during this time can be as low as $372. Flights at noon are often more expensive with an average ticket price of $375.

Can stopping save me money on Casper to Illinois flights?

You could potentially save up to 21% on your flight if you consider stops on a Casper to Illinois flight.

Cheap Casper to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Casper to Illinois

Direct flights	None

There are no direct flights from Casper to Illinois. There are no popular flight routes from Casper to Illinois.

Search flight deals

When did momondo last update prices for flights from Casper Natrona County Airport to Illinois?
Prices for flights from Casper Natrona County Airport to Illinois are updated daily.
How many operators does momondo search for flights from Casper Natrona County Airport to Illinois?
There is 1 operator available for flights from Casper Natrona County Airport to Illinois as of September 2025.
How old do you have to be to fly from Casper Natrona County Airport to Illinois?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Casper Natrona County Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The travel and health documents you'll need for your trip to Illinois may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Illinois. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Why use momondo?

Why should I use momondo to find a flight deal from Casper to Illinois?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Casper to Illinois. momondo saves you time and could save you money on your trip.

Can I find flights from Casper to Illinois with flexible booking policies on momondo?

Flights from Casper to Illinois with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Casper to Illinois?

momondo provides multiple filters to help you find the best flight to Illinois from Casper. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Casper to Illinois right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Illinois from Casper. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Find better results for your trip to Illinois

Popular cities in Illinois

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Flights to Dallasfrom $63

Flights to Seattlefrom $78

Cheap flights from Casper to Illinois from $278

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Casper to Illinois departing on 9/24. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Casper to Illinois

Cheap round-trip flights

United Airlines flights from Casper to Illinois

Our best United Airlines deals on Casper to Illinois flight tickets

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Use the filters below to find and compare flights from Casper to Illinois that are best for you.

See travel insights to Illinois from

How to get the cheapest flight ticket from Casper to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Illinois?

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from Casper to Illinois during this time can be as low as $372. Flights at noon are often more expensive with an average ticket price of $375.

Can stopping save me money on Casper to Illinois flights?

You could potentially save up to 21% on your flight if you consider stops on a Casper to Illinois flight.

Cheap Casper to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Casper to Illinois

Direct flights

When did momondo last update prices for flights from Casper Natrona County Airport to Illinois?

How many operators does momondo search for flights from Casper Natrona County Airport to Illinois?

How old do you have to be to fly from Casper Natrona County Airport to Illinois?

What documentation or ID do you need to fly to Illinois?

Why use momondo?

Why should I use momondo to find a flight deal from Casper to Illinois?

Can I find flights from Casper to Illinois with flexible booking policies on momondo?

How can momondo help me find flights from Casper to Illinois?

I’m not ready to book a flight from Casper to Illinois right now. Can momondo alert me if prices change?

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Illinois

Popular cities in Illinois

Popular flights according to clicks in the last 7 days on momondo