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$98+ Cheap flights from Decatur, IL (DEC) to Illinois

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 11/21. Fares are subject to change and may not be available on all flights or dates of travel.
DEC — ORD
Dec 3 — Dec 101
Wed 12/3
Wed 12/10
1 adult, Economy
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Cheap flight deals from Decatur to Illinois

Keep the following information in mind while searching for Decatur to Illinois flight deals. Data was last updated November 3, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$159
(United Airlines)

One-way from

$98
(United Airlines)

Good round-trip deal

$364 or less

Good one-way deal

$143 or less
Provider with most accurate pricing for Decatur Arpt-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Decatur Arpt-Chicago (CHI) flights.
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From Decatur Arpt to Illinois
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One-way flight from Decatur Arpt to Illinois
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Price to beat on a round-trip flight from Decatur Arpt to Illinois.
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Price to beat on a one-way flight from Decatur Arpt to Illinois.
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Find flight deals from Decatur to Illinois

Cheapest flights from Decatur to Illinois
Explore the most affordable flight options available from Decatur to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 3, 2025.

This United Airlines deal was found by Cheapflights users on 11/3. 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 11/219:44 amDEC - ORD
Nonstop1h 11mUnited Airlines
Thu 12/117:45 amORD - DEC
Nonstop1h 03mUnited Airlines
Deal found 11/3$159
This United Airlines deal was found by Cheapflights users on 11/3. 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 11/157:08 pmDEC - ORD
Nonstop1h 11mUnited Airlines
Mon 11/177:45 amORD - DEC
Nonstop1h 03mUnited Airlines
Deal found 11/3$174
This United Airlines deal was found by Cheapflights users on 11/2. 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 11/167:08 pmDEC - ORD
Nonstop1h 11mUnited Airlines
Thu 11/207:45 amORD - DEC
Nonstop1h 03mUnited Airlines
Deal found 11/2$191
This United Airlines deal was found by Cheapflights users on 11/1. 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 11/67:08 pmDEC - ORD
Nonstop1h 11mUnited Airlines
Tue 11/254:50 pmORD - DEC
Nonstop1h 02mUnited Airlines
Deal found 11/1$195
This United Airlines deal was found by Cheapflights users on 11/3. 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 11/147:08 pmDEC - ORD
Nonstop1h 11mUnited Airlines
Sun 11/164:50 pmORD - DEC
Nonstop1h 02mUnited Airlines
Deal found 11/3$199
This United Airlines deal was found by Cheapflights users on 11/3. 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 11/107:08 pmDEC - ORD
Nonstop1h 11mUnited Airlines
Tue 11/114:50 pmORD - DEC
Nonstop1h 02mUnited Airlines
Deal found 11/3$291

Cheapflights Fare Finder

 
Customize your flight search to find flights from Decatur to Illinois 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 November 3, 2025.
Use the filters below to find and compare flights from Decatur to Illinois that are best for you.

Fly from

Decatur

Fly to

Illinois

Route

Depart

Return

Price

DecaturChicago

DEC - ORD

DECORD

Decatur Arpt

Fri 11/21

9:44 am-10:55 am

Nonstop1h 11m

Chicago O'Hare Intl

Thu 12/11

4:50 pm-5:52 pm

Nonstop1h 02m

$159

DecaturChicago

DEC - ORD

DECORD

Decatur Arpt

Wed 2/11

9:49 am-11:05 am

Nonstop1h 16m

Chicago O'Hare Intl

Tue 2/17

4:52 pm-5:56 pm

Nonstop1h 04m

$159

DecaturChicago

DEC - ORD

DECORD

Decatur Arpt

Sat 4/18

6:55 pm-8:00 pm

Nonstop1h 05m

Chicago O'Hare Intl

Wed 4/22

7:50 am-8:51 am

Nonstop1h 01m

$159

DecaturChicago

DEC - ORD

DECORD

Decatur Arpt

Wed 12/3

9:49 am-11:00 am

Nonstop1h 11m

Chicago O'Hare Intl

Sat 12/13

4:50 pm-5:52 pm

Nonstop1h 02m

$159

DecaturChicago

DEC - ORD

DECORD

Decatur Arpt

Wed 11/26

9:44 am-10:55 am

Nonstop1h 11m

Chicago O'Hare Intl

Sun 11/30

4:50 pm-5:52 pm

Nonstop1h 02m

$159

DecaturChicago

DEC - ORD

DECORD

Decatur Arpt

Tue 12/9

7:08 pm-8:19 pm

Nonstop1h 11m

Chicago O'Hare Intl

Tue 12/16

4:50 pm-5:52 pm

Nonstop1h 02m

$159

DecaturChicago

DEC - ORD

DECORD

Decatur Arpt

Sat 11/15

7:08 pm-8:19 pm

Nonstop1h 11m

Chicago O'Hare Intl

Mon 11/17

7:45 am-8:48 am

Nonstop1h 03m

$174

DecaturChicago

DEC - ORD

DECORD

Decatur Arpt

Mon 11/17

7:08 pm-8:19 pm

Nonstop1h 11m

Chicago O'Hare Intl

Fri 11/21

7:45 am-8:48 am

Nonstop1h 03m

$191

DecaturChicago

DEC - ORD

DECORD

Decatur Arpt

Fri 11/21

7:08 pm-8:19 pm

Nonstop1h 11m

$98

DecaturChicago

DEC - ORD

DECORD

Decatur Arpt

Sat 12/13

7:08 pm-8:19 pm

Nonstop1h 11m

$98

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/3

Showing 1-10 of 13 results
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Best time to book a flight from Decatur to Illinois

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

What is the cheapest month to book a flight from Decatur, Illinois to Illinois?

Currently, May is the cheapest month in which you can book a flight from Decatur, Illinois to Illinois (average of $148). Flying from Decatur, Illinois to Illinois in March is currently the most expensive (average of $432). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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

Find hourly flight availability from Decatur to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 3, 2025.

One of the essential ways to save on airfare from Decatur, Illinois to Illinois is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight at noon could potentially save you up to 51% on airfare.

Weekly flight availability from Decatur, Illinois to Illinois

Explore weekly flight availability from Decatur to Illinois. 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 November 3, 2025.

The most flights from DEC to USIL 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).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated November 3, 2025.
Get a feel of what it's like to fly with United Airlines from Decatur to Illinois by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,997 reviews

Entertainment

7.1

Food

6.6

Crew

8.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
8,997 reviews
United Airlines
7.4
Good
8,997 reviews

Entertainment

7.1

Food

6.6

Crew

8.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Related info for your journey

Find useful and relevant information for your journey from Decatur to Illinois. 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 from for flights from Decatur to Illinois?

    Decatur Arpt (DEC) is the airport you will fly out of if you book a flight from Decatur to Illinois. It is only a 4.7 mi journey to Decatur Arpt (DEC) from Decatur’s city center.

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

    United Airlines can get you from Decatur, Illinois to Illinois in just under 1h 11m. Your travel time will be generally consistent. There are 156 mi between Decatur, Illinois and Illinois. Most flights are nonstop.

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

    On average you can expect to pay $382 for a flight from Decatur, Illinois to Illinois. The cheapest flight overall is $97 while the most popular route, (Decatur Arpt - Chicago O'Hare Intl) is currently priced at $159.

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

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

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

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

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

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

  • What is the cheapest month to book a flight from Decatur, Illinois to Illinois?

    Currently, May is the cheapest month in which you can book a flight from Decatur, Illinois to Illinois (average of $148). Flying from Decatur, Illinois to Illinois in March is currently the most expensive (average of $432). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Alternative routes for Decatur to Illinois

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Top airline flying from Decatur to Illinois

Discover the top airline that operate flights from Decatur to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$148Average$158FlexibilityNo cancel feeOn-time69%

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