What is the cheapest airline that flies from Illinois to Casper Natrona County?

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

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 November 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.

$248 Cheap Flights from Illinois to Casper in 2025/26

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Find the cheapest flights from Illinois to Casper

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One-way

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Cheap round-trip flights

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2:02 pm - 8:26 pmORD-CPR

7h 24m1 stop

6:08 pm - 11:59 pmCPR-ORD

4h 51m1 stop

$248United Airlines

Find Deal

lun., feb. 23 - lun., mar. 2

7:00 am - 10:48 amORD-CPR

4h 48m1 stop

1:25 pm - 9:13 pmCPR-ORD

6h 48m1 stop

$318United Airlines

Find Deal

mié., abr. 29 - sáb., may. 2

2:40 pm - 10:15 pmORD-CPR

8h 35m1 stop

11:21 am - 6:55 pmCPR-ORD

6h 34m1 stop

$369United Airlines

Find Deal

mar., dic. 2 - mar., dic. 9

7:25 am - 5:01 pmORD-CPR

10h 36m2 stops

1:20 pm - 11:59 pmCPR-ORD

9h 39m1 stop

$392United Airlines

Find Deal

mié., feb. 25 - lun., mar. 2

8:04 pm - 2:38 pmORD-CPR

19h 34m2 stops

1:30 pm - 7:44 pmCPR-ORD

5h 14m1 stop

$413United Airlines

Find Deal

mar., dic. 2 - mar., dic. 9

2:40 pm - 7:17 pmORD-CPR

5h 37m1 stop

9:03 am - 4:58 pmCPR-ORD

6h 55m1 stop

$444United Airlines

Find Deal

dom., nov. 23 - jue., nov. 27

7:10 am - 4:59 pmORD-CPR

10h 49m2 stops

3:15 pm - 10:25 pmCPR-ORD

6h 10m1 stop

$452United Airlines

Find Deal

mié., abr. 29 - sáb., may. 2

8:15 pm - 4:53 pmORD-CPR

21h 38m2 stops

8:55 pm - 3:20 amCPR-ORD

5h 25m1 stop

$453United Airlines

Find Deal

dom., nov. 23 - dom., nov. 30

1:00 pm - 7:17 pmORD-CPR

7h 17m1 stop

8:55 pm - 3:20 amCPR-ORD

5h 25m1 stop

$454United Airlines

Find Deal

dom., nov. 23 - dom., nov. 30

8:45 am - 7:10 pmORD-CPR

11h 25m2 stops

1:25 pm - 7:43 pmCPR-ORD

5h 18m1 stop

$487United Airlines

Find Deal

mié., abr. 29 - sáb., may. 2

United Airlines flights from Illinois to Casper

Our best United Airlines deals on Illinois to Casper flight tickets

United Airlines

Feb 23

ORD2:02 pmChicago O'Hare Intl

7h 24m

1 stop

CPR8:26 pmCasper Natrona County

Mar 2

CPR6:08 pmCasper Natrona County

4h 51m

1 stop

ORD11:59 pmChicago O'Hare Intl

$248

Find similar

United Airlines

Apr 29

ORD7:00 amChicago O'Hare Intl

4h 48m

1 stop

CPR10:48 amCasper Natrona County

May 2

CPR1:25 pmCasper Natrona County

6h 48m

1 stop

ORD9:13 pmChicago O'Hare Intl

$318

Find similar

United Airlines

Nov 14

STL4:43 pmLambert-St Louis

6h 15m

1 stop

CPR9:58 pmCasper Natrona County

Nov 21

CPR11:20 amCasper Natrona County

4h 08m

1 stop

STL4:28 pmLambert-St Louis

$343

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoCasper

ORD - CPR

ORDCPR

Chicago O'Hare Intl

lun. 2/23

2:02 pm-8:26 pm

1 stop7h 24m

Casper Natrona County

lun. 3/2

6:08 pm-11:59 pm

1 stop4h 51m

$248

ChicagoCasper

ORD - CPR

ORDCPR

Chicago O'Hare Intl

mié. 4/29

7:00 am-10:48 am

1 stop4h 48m

Casper Natrona County

sáb. 5/2

1:25 pm-9:13 pm

1 stop6h 48m

$318

ChicagoCasper

ORD - CPR

ORDCPR

Chicago O'Hare Intl

mar. 12/2

2:40 pm-10:15 pm

1 stop8h 35m

Casper Natrona County

mar. 12/9

11:21 am-6:55 pm

1 stop6h 34m

$369

ChicagoCasper

ORD - CPR

ORDCPR

Chicago O'Hare Intl

mié. 2/25

7:25 am-5:01 pm

2 stops10h 36m

Casper Natrona County

lun. 3/2

1:20 pm-11:59 pm

1 stop9h 39m

$392

ChicagoCasper

ORD - CPR

ORDCPR

Chicago O'Hare Intl

mar. 12/2

8:04 pm-2:38 pm

2 stops19h 34m

Casper Natrona County

mar. 12/9

1:30 pm-7:44 pm

1 stop5h 14m

$413

ChicagoCasper

ORD - CPR

ORDCPR

Chicago O'Hare Intl

dom. 11/23

2:40 pm-7:17 pm

1 stop5h 37m

Casper Natrona County

jue. 11/27

9:03 am-4:58 pm

1 stop6h 55m

$444

ChicagoCasper

ORD - CPR

ORDCPR

Chicago O'Hare Intl

mié. 4/29

7:10 am-4:59 pm

2 stops10h 49m

Casper Natrona County

sáb. 5/2

3:15 pm-10:25 pm

1 stop6h 10m

$452

ChicagoCasper

ORD - CPR

ORDCPR

Chicago O'Hare Intl

dom. 11/23

8:15 pm-4:53 pm

2 stops21h 38m

Casper Natrona County

dom. 11/30

8:55 pm-3:20 am

1 stop5h 25m

$453

ChicagoCasper

ORD - CPR

ORDCPR

Chicago O'Hare Intl

dom. 11/23

1:00 pm-7:17 pm

1 stop7h 17m

Casper Natrona County

dom. 11/30

8:55 pm-3:20 am

1 stop5h 25m

$454

ChicagoCasper

ORD - CPR

ORDCPR

Chicago O'Hare Intl

mié. 4/29

8:45 am-7:10 pm

2 stops11h 25m

Casper Natrona County

sáb. 5/2

1:25 pm-7:43 pm

1 stop5h 18m

$487

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted 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

Prices

Airlines

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

Direct flights	None

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

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 November 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 9,012 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.

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mié. 12/10

mié. 12/17

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Cheap flights from Illinois to Casper from $248

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Casper departing on 2/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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United Airlines flights from Illinois to Casper

Our best United Airlines deals on Illinois to Casper flight tickets

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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?

What is the cheapest airline that flies from Illinois to Casper Natrona County?

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

Cheap Illinois to Casper flight deals and tips

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

Direct flights

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

How many operators does momondo search 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?

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

Best airlines flying from Illinois to Casper

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

Traveling to a place near Casper?

Why use momondo?

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

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

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

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

An easier way to manage your Casper 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 the United States

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