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

Prices for flights from Illinois to Casper Natrona County Airport are refreshed on a daily basis.

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

As of August 2025, there is 1 operator available to choose from for flights from Illinois to Casper Natrona County Airport.

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

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Illinois to Casper Natrona County Airport.

What documentation or ID do you need to fly to Casper Natrona County Airport?

The travel and health documents you'll need for your trip to Casper Natrona County Airport 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 Casper Natrona County Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$318 Cheap Flights from Illinois to Casper in 2025

1 adult

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Find the cheapest flights from Illinois to Casper

Round-trip

One-way

Last minute

Cheap round-trip flights

7:10 am - 2:41 pmORD-CPR

8h 31m1 stop

3:18 pm - 11:59 pmCPR-ORD

7h 41m1 stop

$318United Airlines

Find Deal

Fri, Nov 14 - Mon, Nov 17

4:40 pm - 8:21 pmSTL-CPR

4h 41m1 stop

5:50 pm - 11:53 pmCPR-STL

5h 03m1 stop

$358United Airlines

Find Deal

Sun, Aug 31 - Sun, Sep 7

6:28 pm - 10:12 pmORD-CPR

4h 44m1 stop

1:32 pm - 9:30 pmCPR-ORD

6h 58m1 stop

$359United Airlines

Find Deal

Tue, Oct 7 - Sat, Oct 11

11:30 am - 7:09 pmSTL-CPR

8h 39m2 stops

5:50 pm - 11:53 pmCPR-STL

5h 03m1 stop

$363United Airlines

Find Deal

Sun, Aug 31 - Sun, Sep 7

9:00 am - 4:53 pmSTL-CPR

8h 53m1 stop

7:00 am - 4:28 pmCPR-STL

8h 28m1 stop

$379United Airlines

Find Deal

Fri, Oct 31 - Sun, Nov 2

11:05 am - 9:58 pmSTL-CPR

11h 53m2 stops

7:00 am - 4:28 pmCPR-STL

8h 28m1 stop

$384United Airlines

Find Deal

Fri, Oct 31 - Sun, Nov 2

7:25 am - 4:53 pmORD-CPR

10h 28m2 stops

6:05 pm - 11:59 pmCPR-ORD

4h 54m1 stop

$404United Airlines

Find Deal

Fri, Nov 14 - Mon, Nov 17

9:07 am - 4:52 pmSTL-CPR

8h 45m1 stop

5:50 pm - 11:53 pmCPR-STL

5h 03m1 stop

$428United Airlines

Find Deal

Sat, Aug 30 - Mon, Sep 1

2:53 pm - 7:09 pmORD-CPR

5h 16m1 stop

5:50 pm - 11:59 pmCPR-ORD

5h 09m1 stop

$439United Airlines

Find Deal

Sun, Aug 31 - Sun, Sep 7

8:45 am - 6:47 pmORD-CPR

11h 02m2 stops

11:22 am - 7:55 pmCPR-ORD

7h 33m1 stop

$454United Airlines

Find Deal

Tue, Oct 7 - Sat, Oct 11

United Airlines flights from Illinois to Casper

Our best United Airlines deals on Illinois to Casper flight tickets

United Airlines

Nov 14

ORD7:10 amChicago O'Hare Intl

8h 31m

1 stop

CPR2:41 pmCasper Natrona County

Nov 17

CPR3:18 pmCasper Natrona County

7h 41m

1 stop

ORD11:59 pmChicago O'Hare Intl

$318

Find similar

United Airlines

Aug 13

STL1:42 pmLambert-St Louis

6h 02m

1 stop

CPR6:44 pmCasper Natrona County

Aug 19

CPR5:50 pmCasper Natrona County

5h 03m

1 stop

STL11:53 pmLambert-St Louis

$343

Find similar

United Airlines

Aug 31

STL4:40 pmLambert-St Louis

4h 41m

1 stop

CPR8:21 pmCasper Natrona County

Sep 7

CPR5:50 pmCasper Natrona County

5h 03m

1 stop

STL11:53 pmLambert-St Louis

$358

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoCasper

ORD - CPR

ORDCPR

Chicago O'Hare Intl

Fri 11/14

7:10 am-2:41 pm

1 stop8h 31m

Casper Natrona County

Mon 11/17

3:18 pm-11:59 pm

1 stop7h 41m

$318

St. LouisCasper

STL - CPR

STLCPR

Lambert-St Louis

Sun 8/31

4:40 pm-8:21 pm

1 stop4h 41m

Casper Natrona County

Sun 9/7

5:50 pm-11:53 pm

1 stop5h 03m

$358

ChicagoCasper

ORD - CPR

ORDCPR

Chicago O'Hare Intl

Tue 10/7

6:28 pm-10:12 pm

1 stop4h 44m

Casper Natrona County

Sat 10/11

1:32 pm-9:30 pm

1 stop6h 58m

$359

St. LouisCasper

STL - CPR

STLCPR

Lambert-St Louis

Sun 8/31

11:30 am-7:09 pm

2 stops8h 39m

Casper Natrona County

Sun 9/7

5:50 pm-11:53 pm

1 stop5h 03m

$363

St. LouisCasper

STL - CPR

STLCPR

Lambert-St Louis

Fri 10/31

9:00 am-4:53 pm

1 stop8h 53m

Casper Natrona County

Sun 11/2

7:00 am-4:28 pm

1 stop8h 28m

$379

St. LouisCasper

STL - CPR

STLCPR

Lambert-St Louis

Fri 10/31

11:05 am-9:58 pm

2 stops11h 53m

Casper Natrona County

Sun 11/2

7:00 am-4:28 pm

1 stop8h 28m

$384

ChicagoCasper

ORD - CPR

ORDCPR

Chicago O'Hare Intl

Fri 11/14

7:25 am-4:53 pm

2 stops10h 28m

Casper Natrona County

Mon 11/17

6:05 pm-11:59 pm

1 stop4h 54m

$404

St. LouisCasper

STL - CPR

STLCPR

Lambert-St Louis

Sat 8/30

9:07 am-4:52 pm

1 stop8h 45m

Casper Natrona County

Mon 9/1

5:50 pm-11:53 pm

1 stop5h 03m

$428

ChicagoCasper

ORD - CPR

ORDCPR

Chicago O'Hare Intl

Sun 8/31

2:53 pm-7:09 pm

1 stop5h 16m

Casper Natrona County

Sun 9/7

5:50 pm-11:59 pm

1 stop5h 09m

$439

ChicagoCasper

ORD - CPR

ORDCPR

Chicago O'Hare Intl

Tue 10/7

8:45 am-6:47 pm

2 stops11h 02m

Casper Natrona County

Sat 10/11

11:22 am-7:55 pm

1 stop7h 33m

$454

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from Illinois to Casper

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 Casper?

The cheapest day to depart from Illinois to Casper is on a Friday when prices can be found for as low as $391. The most expensive day to fly to Casper is Sunday, with ticket prices averaging around $702.

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

The cheapest time of day to fly to Casper is in the afternoon when flights can be purchased for as low as $390. Flights to Casper are more costly at noon, with an average ticket price of $563. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

Cheap Illinois to Casper flight deals and tips

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

Best Price Found	$318
Fastest flight time	4h 41m
Direct flights	None
Airports in Casper	1 airport

The best flight deal from Illinois to Casper found on momondo in the last 72 hours is $318

The fastest flight from Illinois to Casper takes 4h 41m

There are no direct flights from Illinois to Casper. Popular non-direct routes for this connection are Chicago O'Hare Intl Airport - Casper Natrona County Airport and Lambert-St Louis Airport - Casper Natrona County Airport.

There is 1 airport near Casper: Casper Natrona County (CPR)

Search flight deals

When did momondo last update prices for flights from Illinois to Casper Natrona County Airport?
Prices for flights from Illinois to Casper Natrona County Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Illinois to Casper Natrona County Airport?
As of August 2025, there is 1 operator available to choose from for flights from Illinois to Casper Natrona County Airport.
How old do you have to be to fly from Illinois to Casper Natrona County Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Illinois to Casper Natrona County Airport.
What documentation or ID do you need to fly to Casper Natrona County Airport?
The travel and health documents you'll need for your trip to Casper Natrona County Airport 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 Casper Natrona County Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Illinois to Casper

Compare and see reviews for airlines that fly from Illinois to Casper with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $248	Free Cancellation	Rating 7.4 8,916 reviews		Search United Airlines flights

Rawlins

Evansville

Douglas

Why use momondo?

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

It is quick and easy to find Illinois to Casper flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Casper that suits you.

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

momondo does allow users to show only those flights to Casper from Illinois which offer a flexible booking policy as well as other useful filters and features.

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

Once you have performed a search for Illinois to Casper flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

If you are not ready to book a flight from Illinois to Casper now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Casper and let you know when they change.