$308 Find Cheap Flights from Casper to Illinois

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Casper to Illinois departing on 1/17. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Illinois

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Casper to Illinois, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Casper to Illinois, as well as popular online travel agencies
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Flight Deals

Book Cheap Casper to Illinois Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Casper to Illinois that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Casper to Illinois

Sat, Jan 17 - Wed, Jan 21
United Airlines Logo
7:00 am - 1:16 pm
CPR
-
STL
5h 16m1 stop
United Airlines Logo
2:45 pm - 7:06 pm
STL
-
CPR
5h 21m1 stop
$308United Airlines
Sat, Jan 17 - Wed, Jan 21
United Airlines Logo
1:16 pm - 8:58 pm
CPR
-
STL
6h 42m1 stop
United Airlines Logo
11:20 am - 10:14 pm
STL
-
CPR
11h 54m2 stops
$314United Airlines
Fri, Jan 9 - Tue, Jan 13
United Airlines Logo
1:16 pm - 7:51 pm
CPR
-
ORD
5h 35m1 stop
United Airlines Logo
12:53 pm - 7:06 pm
ORD
-
CPR
7h 13m1 stop
$318United Airlines
Sat, Jan 17 - Wed, Jan 21
United Airlines Logo
7:00 am - 4:03 pm
CPR
-
STL
8h 03m2 stops
United Airlines Logo
8:05 am - 4:54 pm
STL
-
CPR
9h 49m2 stops
$319United Airlines
Wed, Dec 24 - Mon, Dec 29
United Airlines Logo
3:19 pm - 10:22 pm
CPR
-
STL
6h 03m1 stop
United Airlines Logo
8:05 am - 10:25 pm
STL
-
CPR
15h 20m2 stops
$549United Airlines
Wed, Dec 24 - Mon, Dec 29
United Airlines Logo
6:10 pm - 10:08 am
CPR
-
STL
14h 58m2 stops
United Airlines Logo
8:05 am - 10:25 pm
STL
-
CPR
15h 20m2 stops
$584United Airlines
Wed, Dec 24 - Mon, Dec 29
United Airlines Logo
3:19 pm - 10:22 pm
CPR
-
STL
6h 03m1 stop
United Airlines Logo
8:05 am - 10:25 pm
STL
-
CPR
15h 20m2 stops
$599United Airlines
Wed, Dec 24 - Mon, Dec 29
United Airlines Logo
6:10 pm - 10:08 am
CPR
-
STL
14h 58m2 stops
United Airlines Logo
6:30 am - 8:41 pm
STL
-
CPR
15h 11m2 stops
$634United Airlines
Mon, Dec 22 - Sun, Dec 28
United Airlines Logo
6:10 pm - 11:59 pm
CPR
-
ORD
4h 49m1 stop
United Airlines Logo
8:20 pm - 4:59 pm
ORD
-
CPR
21h 39m2 stops
$635United Airlines
Wed, Dec 24 - Mon, Dec 29
United Airlines Logo
3:19 pm - 10:22 pm
CPR
-
STL
6h 03m1 stop
United Airlines Logo
9:00 am - 4:59 pm
STL
-
CPR
8h 59m1 stop
$638United Airlines
Booking Insights

KAYAK's insights & trends for Casper to Illinois flights

Get data-powered insights and trends into flights from Casper to Illinois to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Casper to Illinois?

The average price of all round-trip flights from Casper to Illinois clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Illinois on a Friday and more expensive on a Tuesday. On your return trip to Casper, you should consider flying back on a Friday, and avoid Wednesdays for better deals.

Find deals

Good to know

Cheapest flight$308
Flight from Casper to St. Louis

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Casper to Illinois?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Casper to Illinois.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Casper to Illinois?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Casper to Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Casper to Illinois?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Casper to Illinois with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Casper to Illinois?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Casper to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Illinois?

    The cheapest time of day to fly to Illinois is generally in the evening, when round-trip flights cost $372 on average. Morning departures are around 100% cheaper than evening flights, on average. The most expensive time of day to fly to Illinois is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $375.

Everything you need to know for your flight from Casper to Illinois

Information on your arrival and departure airports

Casper (CPR)