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Decatur

$93+ Cheap flights from Illinois 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 11/19. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — DEC
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Find flight deals from Illinois to Decatur

Cheapest flights from Illinois to Decatur
Explore the most affordable flight options available from Illinois to Decatur. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This United Airlines deal was found by Cheapflights users on 10/30. 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.
Thu 11/277:45 amORD - DEC
Nonstop1h 03mUnited Airlines
Thu 12/47:08 pmDEC - ORD
Nonstop1h 11mUnited Airlines
Deal found 10/30$149
This United Airlines deal was found by Cheapflights users on 10/28. 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.
Wed 11/127:45 amORD - DEC
Nonstop1h 03mUnited Airlines
Sun 11/167:08 pmDEC - ORD
Nonstop1h 11mUnited Airlines
Deal found 10/28$159
This United Airlines deal was found by Cheapflights users on 10/28. 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.
Thu 11/67:45 amORD - DEC
Nonstop1h 03mUnited Airlines
Thu 11/137:08 pmDEC - ORD
Nonstop1h 11mUnited Airlines
Deal found 10/28$174
This United Airlines deal was found by Cheapflights users on 10/28. 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 11/114:50 pmORD - DEC
Nonstop1h 02mUnited Airlines
Sat 11/157:08 pmDEC - ORD
Nonstop1h 11mUnited Airlines
Deal found 10/28$191
This United Airlines deal was found by Cheapflights users on 10/28. 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 11/14:50 pmORD - DEC
Nonstop1h 02mUnited Airlines
Mon 11/37:08 pmDEC - ORD
Nonstop1h 11mUnited Airlines
Deal found 10/28$199
This United Airlines deal was found by Cheapflights users on 10/28. 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 11/104:50 pmORD - DEC
Nonstop1h 02mUnited Airlines
Fri 11/149:44 amDEC - ORD
Nonstop1h 11mUnited Airlines
Deal found 10/28$241
This United Airlines deal was found by Cheapflights users on 10/28. 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.
Thu 10/304:50 pmORD - DEC
Nonstop1h 02mUnited Airlines
Fri 10/319:44 amDEC - ORD
Nonstop1h 11mUnited Airlines
Deal found 10/28$391
This United Airlines deal was found by Cheapflights users on 10/29. 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.
Thu 11/1312:31 pmSTL - DEC
1 stop5h 21mUnited Airlines
Mon 11/177:08 pmDEC - STL
1 stop20h 39mUnited Airlines
Deal found 10/29$525
This United Airlines deal was found by Cheapflights users on 10/29. 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.
Thu 10/306:43 pmSTL - DEC
1 stop23h 09mUnited Airlines
Thu 11/69:44 amDEC - STL
1 stop6h 02mUnited Airlines
Deal found 10/29$617

Cheap flight deals from Illinois to Decatur

Keep the following information in mind while searching for Illinois to Decatur flight deals. Data was last updated October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$149
(United Airlines)

One-way from

$93
(United Airlines)

Good one-way deal

$138 or less
Provider with most accurate pricing for Chicago (CHI)-Decatur Arpt flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Decatur Arpt flights.
Search Deals
From Illinois to Decatur Arpt
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One-way flight from Illinois to Decatur Arpt
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Price to beat on a one-way flight from Illinois to Decatur Arpt.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois 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 October 30, 2025.
Use the filters below to find and compare flights from Illinois to Decatur that are best for you.

Fly from

Illinois

Fly to

Decatur

Route

Depart

Return

Price

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Thu 11/27

7:45 am-8:48 am

Nonstop1h 03m

Decatur Arpt

Thu 12/4

7:08 pm-8:19 pm

Nonstop1h 11m

$149

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Fri 11/14

4:50 pm-5:52 pm

Nonstop1h 02m

Decatur Arpt

Tue 11/18

7:08 pm-8:19 pm

Nonstop1h 11m

$159

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Wed 12/3

4:50 pm-5:52 pm

Nonstop1h 02m

Decatur Arpt

Wed 12/10

7:08 pm-8:19 pm

Nonstop1h 11m

$159

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Wed 11/12

7:45 am-8:48 am

Nonstop1h 03m

Decatur Arpt

Sun 11/16

7:08 pm-8:19 pm

Nonstop1h 11m

$159

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Sun 12/14

4:50 pm-5:52 pm

Nonstop1h 02m

Decatur Arpt

Sun 12/21

7:09 pm-8:25 pm

Nonstop1h 16m

$159

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Thu 11/13

7:45 am-8:48 am

Nonstop1h 03m

Decatur Arpt

Mon 11/17

9:44 am-10:55 am

Nonstop1h 11m

$159

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Wed 11/26

7:45 am-8:48 am

Nonstop1h 03m

Decatur Arpt

Wed 12/3

9:49 am-11:00 am

Nonstop1h 11m

$159

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Sat 11/29

4:50 pm-5:52 pm

Nonstop1h 02m

Decatur Arpt

Mon 12/1

9:44 am-10:55 am

Nonstop1h 11m

$174

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Thu 11/6

7:45 am-8:48 am

Nonstop1h 03m

Decatur Arpt

Thu 11/13

7:08 pm-8:19 pm

Nonstop1h 11m

$174

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Tue 11/11

4:50 pm-5:52 pm

Nonstop1h 02m

Decatur Arpt

Sat 11/15

7:08 pm-8:19 pm

Nonstop1h 11m

$191

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

Showing 1-10 of 17 results
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Best time to book a flight from Illinois to Decatur

Have a flexible travel schedule? Discover the best time to fly to Decatur from Illinois 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 Illinois to Decatur

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

Find hourly flight availability from Illinois 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 October 30, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Decatur, Illinois as you normally would.

Related info for your journey

Find useful and relevant information for your journey from Illinois 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 Illinois?

    Located just 4.7 mi from the city center, Decatur Arpt (DEC) is the airport most travelers will use when flying to Decatur from Illinois.

  • How long is the flight from Illinois to Decatur, Illinois?

    For as low as $149, United Airlines can have you in Decatur, Illinois from Illinois in 1h 03m. The distance from Illinois to Decatur, Illinois is about 156 mi. All flights are typically nonstop.

  • What are the cheapest flights from Illinois to Decatur, Illinois?

    On average you can expect to pay $138 for a flight from Illinois to Decatur, Illinois. The cheapest flight overall is $138 while the most popular route, (Chicago O'Hare Intl - Decatur Arpt) is currently priced at $159.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Illinois 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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Alternative routes for Illinois to Decatur

See prices for flight routes from nearby airports that may be better suited for you.
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