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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 5/2. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — DEC
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
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 January 29, 2026.

This United Airlines deal was found by Cheapflights users on 1/28. 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 2/127:45 am
ORD
-
DEC
Nonstop1h 07m
United Airlines
Mon 2/169:50 am
DEC
-
ORD
Nonstop1h 10m
United Airlines
Deal found 1/28$149
This United Airlines deal was found by Cheapflights users on 1/29. 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.
Fri 2/137:45 am
ORD
-
DEC
Nonstop1h 07m
United Airlines
Tue 2/177:15 pm
DEC
-
ORD
Nonstop1h 10m
United Airlines
Deal found 1/29$159
This United Airlines deal was found by Cheapflights users on 1/28. 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 2/74:52 pm
ORD
-
DEC
Nonstop1h 09m
United Airlines
Wed 2/187:15 pm
DEC
-
ORD
Nonstop1h 10m
United Airlines
Deal found 1/28$174
This United Airlines deal was found by Cheapflights users on 1/27. 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 2/174:50 pm
ORD
-
DEC
Nonstop1h 04m
United Airlines
Wed 2/187:15 pm
DEC
-
ORD
Nonstop1h 10m
United Airlines
Deal found 1/27$191
This United Airlines deal was found by Cheapflights users on 1/27. 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 1/304:52 pm
ORD
-
DEC
Nonstop1h 09m
United Airlines
Wed 2/47:09 pm
DEC
-
ORD
Nonstop1h 16m
United Airlines
Deal found 1/27$199
This United Airlines deal was found by Cheapflights users on 1/28. 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 2/129:55 am
STL
-
DEC
1 stop22h 57m
United Airlines
Mon 2/167:15 pm
DEC
-
STL
1 stop3h 44m
United Airlines
Deal found 1/28$435
This United Airlines deal was found by Cheapflights users on 1/27. 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 3/137:00 pm
STL
-
DEC
1 stop22h 53m
United Airlines
Fri 3/207:15 pm
DEC
-
STL
1 stop26h 27m
United Airlines
Deal found 1/27$535

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 January 29, 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 January 29, 2026.
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 2/12

7:45 am-8:52 am

Nonstop1h 07m

Decatur Arpt

Mon 2/16

9:50 am-11:00 am

Nonstop1h 10m

$149

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Fri 2/13

7:45 am-8:52 am

Nonstop1h 07m

Decatur Arpt

Fri 2/20

7:15 pm-8:25 pm

Nonstop1h 10m

$159

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Fri 2/13

7:45 am-8:52 am

Nonstop1h 07m

Decatur Arpt

Tue 2/17

7:15 pm-8:25 pm

Nonstop1h 10m

$159

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Wed 2/11

7:45 am-9:05 am

Nonstop1h 20m

Decatur Arpt

Sun 2/15

7:15 pm-8:25 pm

Nonstop1h 10m

$159

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Sun 3/22

7:45 am-8:52 am

Nonstop1h 07m

Decatur Arpt

Mon 3/23

7:15 pm-8:25 pm

Nonstop1h 10m

$191

St. LouisDecatur

STL - DEC

STLDEC

Lambert-St Louis

Thu 2/12

9:55 am-8:52 am

1 stop22h 57m

Decatur Arpt

Mon 2/16

7:15 pm-10:59 pm

1 stop3h 44m

$435

St. LouisDecatur

STL - DEC

STLDEC

Lambert-St Louis

Fri 3/13

7:00 pm-5:53 pm

1 stop22h 53m

Decatur Arpt

Fri 3/20

7:15 pm-9:42 pm

1 stop26h 27m

$535

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Sat 5/2

4:50 pm-5:58 pm

Nonstop1h 08m

$93

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Thu 3/5

4:49 pm-5:53 pm

Nonstop1h 04m

$93

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Tue 3/10

4:49 pm-5:53 pm

Nonstop1h 04m

$93

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 12 results
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 January 29, 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 January 29, 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 07m. 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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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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