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 2026.

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.

$318 Cheap Flights from Casper to Illinois in 2026

Find the cheapest flights from Casper to Illinois

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

3:11 pm - 9:18 pmCPR Casper Natrona County-ORD Chicago O'Hare Intl

5h 07m1 stop Denver Intl

5:00 am - 8:59 amORD Chicago O'Hare Intl-CPR Casper Natrona County

4h 59m1 stop Denver Intl

$318United Airlines

Fri, Oct 16 - Sun, Oct 18

6:00 pm - 11:59 pmCPR Casper Natrona County-ORD Chicago O'Hare Intl

4h 59m1 stop Denver Intl

5:00 am - 8:59 amORD Chicago O'Hare Intl-CPR Casper Natrona County

4h 59m1 stop Denver Intl

$338United Airlines

Sun, Oct 4 - Sun, Oct 11

6:00 pm - 11:59 pmCPR Casper Natrona County-ORD Chicago O'Hare Intl

4h 59m1 stop Denver Intl

5:00 am - 8:59 amORD Chicago O'Hare Intl-CPR Casper Natrona County

4h 59m1 stop Denver Intl

$338United Airlines

Sun, Oct 4 - Sun, Oct 11

6:00 pm - 11:59 pmCPR Casper Natrona County-ORD Chicago O'Hare Intl

4h 59m1 stop Denver Intl

7:00 am - 12:39 pmORD Chicago O'Hare Intl-CPR Casper Natrona County

6h 39m1 stop Denver Intl

$338United Airlines

Thu, Oct 22 - Sat, Oct 24

3:11 pm - 9:18 pmCPR Casper Natrona County-ORD Chicago O'Hare Intl

5h 07m1 stop Denver Intl

5:00 am - 8:59 amORD Chicago O'Hare Intl-CPR Casper Natrona County

4h 59m1 stop Denver Intl

$363United Airlines

Fri, Sep 25 - Mon, Sep 28

6:00 pm - 11:59 pmCPR Casper Natrona County-ORD Chicago O'Hare Intl

4h 59m1 stop Denver Intl

4:20 pm - 10:04 pmORD Chicago O'Hare Intl-CPR Casper Natrona County

6h 44m1 stop Denver Intl

$363United Airlines

Thu, Sep 24 - Sat, Sep 26

6:00 pm - 11:59 pmCPR Casper Natrona County-ORD Chicago O'Hare Intl

4h 59m1 stop Denver Intl

6:00 am - 10:49 amORD Chicago O'Hare Intl-CPR Casper Natrona County

5h 49m1 stop Denver Intl

$368United Airlines

Fri, Sep 18 - Tue, Sep 22

3:13 pm - 8:59 pmCPR Casper Natrona County-STL Lambert-St Louis

4h 46m1 stop Denver Intl

1:40 pm - 9:59 pmSTL Lambert-St Louis-CPR Casper Natrona County

9h 19m1 stop Denver Intl

$388United Airlines

Sat, Oct 31 - Tue, Nov 3

11:24 am - 9:40 pmCPR Casper Natrona County-STL Lambert-St Louis

9h 16m2 stops Denver Intl Chicago O'Hare Intl

4:39 pm - 9:59 pmSTL Lambert-St Louis-CPR Casper Natrona County

6h 20m1 stop Denver Intl

$394United Airlines

Sat, Oct 31 - Tue, Nov 3

1:29 pm - 8:30 pmCPR Casper Natrona County-ORD Chicago O'Hare Intl

6h 01m1 stop Denver Intl

8:40 am - 12:48 pmORD Chicago O'Hare Intl-CPR Casper Natrona County

5h 08m1 stop Denver Intl

$398United Airlines

Sat, Oct 31 - Wed, Nov 4

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United Airlines flights from Casper to Illinois

Our best United Airlines deals on Casper to Illinois flight tickets

United Airlines

Oct 16

CPR3:11 pmCasper Natrona County

5h 07m

1 stop

ORD9:18 pmChicago O'Hare Intl

Oct 18

ORD5:00 amChicago O'Hare Intl

4h 59m

1 stop

CPR8:59 amCasper Natrona County

$318

United Airlines

Oct 4

CPR6:00 pmCasper Natrona County

4h 59m

1 stop

ORD11:59 pmChicago O'Hare Intl

Oct 11

ORD5:00 amChicago O'Hare Intl

4h 59m

1 stop

CPR8:59 amCasper Natrona County

$338

United Airlines

Sep 24

CPR6:00 pmCasper Natrona County

4h 59m

1 stop

ORD11:59 pmChicago O'Hare Intl

Sep 26

ORD4:20 pmChicago O'Hare Intl

6h 44m

1 stop

CPR10:04 pmCasper Natrona County

$363

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

CasperChicago

CPR Casper Natrona County - ORD Chicago O'Hare Intl

CPRORD

Casper Natrona County

Fri 10/16

3:11 pm-9:18 pm

1 stop5h 07m

Chicago O'Hare Intl

Sun 10/18

5:00 am-8:59 am

1 stop4h 59m

$318

Quickest round-trip

CasperChicago

CPR Casper Natrona County - ORD Chicago O'Hare Intl

CPRORD

Casper Natrona County

Sun 10/4

6:00 pm-11:59 pm

1 stop4h 59m

Chicago O'Hare Intl

Sun 10/11

5:00 am-8:59 am

1 stop4h 59m

$338

CasperChicago

CPR Casper Natrona County - ORD Chicago O'Hare Intl

CPRORD

Casper Natrona County

Sun 10/4

6:00 pm-11:59 pm

1 stop4h 59m

Chicago O'Hare Intl

Sun 10/11

5:00 am-8:59 am

1 stop4h 59m

$338

CasperChicago

CPR Casper Natrona County - ORD Chicago O'Hare Intl

CPRORD

Casper Natrona County

Thu 10/22

6:00 pm-11:59 pm

1 stop4h 59m

Chicago O'Hare Intl

Sat 10/24

7:00 am-12:39 pm

1 stop6h 39m

$338

CasperChicago

CPR Casper Natrona County - ORD Chicago O'Hare Intl

CPRORD

Casper Natrona County

Fri 9/25

3:11 pm-9:18 pm

1 stop5h 07m

Chicago O'Hare Intl

Mon 9/28

5:00 am-8:59 am

1 stop4h 59m

$363

CasperChicago

CPR Casper Natrona County - ORD Chicago O'Hare Intl

CPRORD

Casper Natrona County

Thu 9/24

6:00 pm-11:59 pm

1 stop4h 59m

Chicago O'Hare Intl

Sat 9/26

4:20 pm-10:04 pm

1 stop6h 44m

$363

CasperChicago

CPR Casper Natrona County - ORD Chicago O'Hare Intl

CPRORD

Casper Natrona County

Fri 9/18

6:00 pm-11:59 pm

1 stop4h 59m

Chicago O'Hare Intl

Tue 9/22

6:00 am-10:49 am

1 stop5h 49m

$368

CasperSt. Louis

CPR Casper Natrona County - STL Lambert-St Louis

CPRSTL

Casper Natrona County

Sat 10/31

3:13 pm-8:59 pm

1 stop4h 46m

Lambert-St Louis

Tue 11/3

1:40 pm-9:59 pm

1 stop9h 19m

$388

CasperSt. Louis

CPR Casper Natrona County - STL Lambert-St Louis

CPRSTL

Casper Natrona County

Sat 10/31

11:24 am-9:40 pm

2 stops9h 16m

Lambert-St Louis

Tue 11/3

4:39 pm-9:59 pm

1 stop6h 20m

$394

CasperChicago

CPR Casper Natrona County - ORD Chicago O'Hare Intl

CPRORD

Casper Natrona County

Sat 10/31

1:29 pm-8:30 pm

1 stop6h 01m

Chicago O'Hare Intl

Wed 11/4

8:40 am-12:48 pm

1 stop5h 08m

$398

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted 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 airline that flies from Casper Natrona County to Illinois?

United Airlines is the most popular carrier operating from Casper Natrona County to Illinois

Cheap Casper to Illinois flight deals and tips

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

Best Price Found	$388
Fastest flight time	4h 46m
Direct flights	None

The best one-way flight to Illinois from Casper in the past 72 hours is $388. The best round-trip flight deal from Casper to Illinois found on momondo in the last 72 hours is $318.

The fastest flight from Casper to Illinois takes 4h 46m

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

Search flight deals

Frequently asked questions about flying from Casper to Illinois

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 2026.
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.