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Decatur

$93+ Cheap flights from Chicago (CHI) to Decatur, IL (DEC)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — DEC
Aug 21 — Aug 281
Thu 8/21
Thu 8/28
1 adult, Economy
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Cheap flight deals from Chicago to Decatur

Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) to Decatur (DEC). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 16, 2025.

Round-trip from

$149
(United Airlines)

One-way from

$93
(United Airlines)
From Chicago (CHI) to Decatur Arpt
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One-way flight from Chicago (CHI) to Decatur Arpt
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Find flight deals from Chicago to Decatur

Cheapest flights from Chicago to Decatur
Explore the most affordable flight options available from Chicago to Decatur. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 16, 2025.

This United Airlines deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/297:50 amORD - DEC
Nonstop1h 06mUnited Airlines
Tue 9/29:42 amDEC - ORD
Nonstop1h 15mUnited Airlines
Deal found 8/14$149
This Trip.com deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/294:50 pmORD - DEC
Nonstop1h 09mUnited Airlines
Sun 8/316:55 pmDEC - ORD
Nonstop1h 15mUnited Airlines
Deal found 8/15$151
This United Airlines deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/307:50 amORD - DEC
Nonstop1h 06mUnited Airlines
Sun 8/316:55 pmDEC - ORD
Nonstop1h 15mUnited Airlines
Deal found 8/15$158
This United Airlines deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/14:50 pmORD - DEC
Nonstop1h 09mUnited Airlines
Mon 9/296:55 pmDEC - ORD
Nonstop1h 15mUnited Airlines
Deal found 8/15$159
This United Airlines deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/57:45 amORD - DEC
Nonstop1h 06mUnited Airlines
Tue 10/149:38 amDEC - ORD
Nonstop1h 15mUnited Airlines
Deal found 8/15$170
This United Airlines deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/314:50 pmORD - DEC
Nonstop1h 09mUnited Airlines
Thu 9/49:42 amDEC - ORD
Nonstop1h 15mUnited Airlines
Deal found 8/16$191
This United Airlines deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/167:45 amORD - DEC
Nonstop1h 03mUnited Airlines
Sun 8/179:45 amDEC - ORD
Nonstop1h 10mUnited Airlines
Deal found 8/15$199
This United Airlines deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/257:50 amORD - DEC
Nonstop1h 06mUnited Airlines
Thu 8/289:42 amDEC - ORD
Nonstop1h 15mUnited Airlines
Deal found 8/14$241
This United Airlines deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/197:50 amORD - DEC
Nonstop1h 06mUnited Airlines
Wed 8/209:42 amDEC - ORD
Nonstop1h 15mUnited Airlines
Deal found 8/14$391

Cheapflights Fare Finder

 
Customize your flight search to find flights from Chicago to Decatur that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 16, 2025.
Use the filters below to find and compare flights from Chicago to Decatur that are best for you.

Fly from

Chicago

Fly to

Decatur

Route

Depart

Return

Price

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Fri 8/29

7:50 am-8:56 am

Nonstop1h 06m

Decatur Arpt

Tue 9/2

9:42 am-10:57 am

Nonstop1h 15m

$149

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Fri 8/29

4:50 pm-5:59 pm

Nonstop1h 09m

Decatur Arpt

Sun 8/31

6:55 pm-8:10 pm

Nonstop1h 15m

$151

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Sat 8/30

7:50 am-8:56 am

Nonstop1h 06m

Decatur Arpt

Sun 8/31

6:55 pm-8:10 pm

Nonstop1h 15m

$158

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Mon 9/1

7:50 am-8:56 am

Nonstop1h 06m

Decatur Arpt

Mon 9/29

6:55 pm-8:10 pm

Nonstop1h 15m

$159

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Fri 9/12

7:50 am-8:56 am

Nonstop1h 06m

Decatur Arpt

Fri 9/19

6:55 pm-8:10 pm

Nonstop1h 15m

$159

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Thu 8/28

4:50 pm-5:59 pm

Nonstop1h 09m

Decatur Arpt

Sun 8/31

9:42 am-10:57 am

Nonstop1h 15m

$159

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Wed 10/15

4:55 pm-6:04 pm

Nonstop1h 09m

Decatur Arpt

Tue 10/21

9:38 am-10:53 am

Nonstop1h 15m

$159

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Fri 10/3

7:45 am-8:51 am

Nonstop1h 06m

Decatur Arpt

Mon 10/6

9:38 am-10:53 am

Nonstop1h 15m

$159

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Mon 9/15

4:50 pm-5:59 pm

Nonstop1h 09m

$93

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Mon 1/19

9:50 am-10:51 am

Nonstop1h 01m

$93

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 18 results
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Best time to book a flight from Chicago to Decatur

Have a flexible travel schedule? Discover the best time to fly to Decatur from Chicago with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Chicago to Decatur

What is the cheapest time of day to fly from CHI to DEC?

Find hourly flight availability from Chicago to Decatur. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 16, 2025.

A simple way to save on the total cost of your ticket is to fly from Chicago to Decatur, Illinois in the morning. If you’re flexible enough to do this you can expect to save up to 13% on your trip compared to booking a flight at noon.

Related info for your journey

Find useful and relevant information for your journey from Chicago to Decatur. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Decatur from Chicago?

    Most people fly into Decatur Arpt (DEC) if they book a flight to Decatur from Chicago. On average, Decatur Arpt has 1 inbound flight from Chicago per day from 0 airlines. Decatur Arpt is conveniently located just 4.7 mi from Decatur’s city center.

  • Can I find deals for flights from Chicago to Decatur that include hotel bookings?

    Yes. In addition to deals on Chicago to Decatur flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Chicago to Decatur?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chicago to Decatur.

  • Can I find deals for business class flights from Chicago to Decatur?

    Yes. Cheapflights offers flight deals from Chicago to Decatur by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near Decatur?

Book flights to Decatur if you plan to visit one of these locations
Mattoon
Effingham

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