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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 7/6. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — DEC
juil. 10 — juil. 171
ven. 7/10
ven. 7/17
1 adult, Economy
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Cheap 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 juin 10, 2026.

This United Airlines deal was found by Cheapflights users on 6/5. 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.
sam. 7/44:45 pm
ORD
-
DEC
Nonstop1h 11m
United Airlines
ven. 7/109:37 am
DEC
-
ORD
Nonstop1h 08m
United Airlines
Deal found 6/5$149
This United Airlines deal was found by Cheapflights users on 6/4. 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.
sam. 6/274:45 pm
ORD
-
DEC
Nonstop1h 11m
United Airlines
mer. 7/19:37 am
DEC
-
ORD
Nonstop1h 08m
United Airlines
Deal found 6/4$159
This United Airlines deal was found by Cheapflights users on 6/8. 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.
sam. 7/114:45 pm
ORD
-
DEC
Nonstop1h 11m
United Airlines
dim. 7/129:37 am
DEC
-
ORD
Nonstop1h 08m
United Airlines
Deal found 6/8$174
This United Airlines deal was found by Cheapflights users on 6/6. 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.
dim. 6/217:45 am
ORD
-
DEC
Nonstop1h 12m
United Airlines
jeu. 6/259:37 am
DEC
-
ORD
Nonstop1h 08m
United Airlines
Deal found 6/6$191
This United Airlines deal was found by Cheapflights users on 6/4. 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.
mer. 6/241:13 pm
STL
-
DEC
1 stop4h 43m
United Airlines
dim. 6/286:45 pm
DEC
-
STL
1 stop4h 44m
United Airlines
Deal found 6/4$414
This United Airlines deal was found by Cheapflights users on 6/8. 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.
sam. 12/125:18 pm
STL
-
DEC
1 stop15h 28m
United Airlines
mer. 12/166:55 pm
DEC
-
STL
1 stop3h 59m
United Airlines
Deal found 6/8$416
This United Airlines deal was found by Cheapflights users on 6/7. 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.
dim. 7/51:13 pm
STL
-
DEC
1 stop4h 43m
United Airlines
dim. 7/129:37 am
DEC
-
STL
1 stop13h 52m
United Airlines
Deal found 6/7$489

Find flight deals from Illinois to Decatur

Keep the following information in mind while searching for Illinois to Decatur flight deals. Data was last updated juin 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$149
(United Airlines)

One-way from

$93
(United Airlines)
Provider with most accurate pricing for Chicago (CHI)-Decatur Arpt flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Decatur Arpt flights.
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From Illinois to Decatur Arpt
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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 juin 10, 2026.
Use the filters below to find and compare flights from Illinois to Decatur that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

jeu. 7/9

7:45 am-8:57 am

Nonstop1h 12m

Decatur Arpt

jeu. 7/16

6:45 pm-7:53 pm

Nonstop1h 08m

$149

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

mer. 7/22

7:45 am-8:57 am

Nonstop1h 12m

Decatur Arpt

lun. 7/27

6:45 pm-7:53 pm

Nonstop1h 08m

$149
Quickest round-trip

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

sam. 7/4

4:45 pm-5:56 pm

Nonstop1h 11m

Decatur Arpt

ven. 7/10

9:37 am-10:45 am

Nonstop1h 08m

$149

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

ven. 7/10

4:45 pm-5:56 pm

Nonstop1h 11m

Decatur Arpt

dim. 7/12

6:45 pm-7:53 pm

Nonstop1h 08m

$149

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

jeu. 7/2

7:45 am-8:57 am

Nonstop1h 12m

Decatur Arpt

dim. 7/5

6:45 pm-7:53 pm

Nonstop1h 08m

$159

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

mer. 6/24

7:45 am-8:57 am

Nonstop1h 12m

Decatur Arpt

dim. 6/28

9:37 am-10:45 am

Nonstop1h 08m

$159

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

mar. 7/7

4:45 pm-5:56 pm

Nonstop1h 11m

Decatur Arpt

mar. 7/14

6:45 pm-7:53 pm

Nonstop1h 08m

$159

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

mer. 7/1

7:45 am-8:57 am

Nonstop1h 12m

Decatur Arpt

mar. 7/7

6:45 pm-7:53 pm

Nonstop1h 08m

$159

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

mar. 7/21

4:45 pm-5:56 pm

Nonstop1h 11m

Decatur Arpt

mar. 7/28

6:45 pm-7:53 pm

Nonstop1h 08m

$159

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

sam. 6/20

4:45 pm-5:56 pm

Nonstop1h 11m

Decatur Arpt

mer. 6/24

6:45 pm-7:53 pm

Nonstop1h 08m

$159

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/7

Showing 1-10 of 20 resultsSorted by cheapest first
1
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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 juin 10, 2026.

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.

Weekly flight availability from Illinois to Decatur, Illinois

Explore weekly flight availability from Illinois to Decatur. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated juin 10, 2026.

The most flights from USIL to DEC are scheduled on a Monday (2 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (1 on average).

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 12m. The distance from Illinois to Decatur, Illinois is about 156 mi. All flights are typically nonstop.

  • 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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