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

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 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
DEC — CHI
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from Decatur to Chicago

Discover tips and strategies to find the most affordable flight options for your journey from Decatur (DEC) to Chicago (CHI). 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 September 15, 2025.

Round-trip from

$149
(United Airlines)

One-way from

$98
(United Airlines)

Good round-trip deal

$308 or less

Good one-way deal

$258 or less
From Decatur Arpt to Chicago (CHI)
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One-way flight from Decatur Arpt to Chicago (CHI)
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Price to beat on a round-trip flight from Decatur Arpt to Chicago (CHI).
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Price to beat on a one-way flight from Decatur Arpt to Chicago (CHI).
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Find flight deals from Decatur to Chicago

Cheapest flights from Decatur to Chicago
Explore the most affordable flight options available from Decatur to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This United Airlines deal was found by Cheapflights users on 9/15. 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 9/296:55 pmDEC - ORD
Nonstop1h 15mUnited Airlines
Mon 10/64:55 pmORD - DEC
Nonstop1h 09mUnited Airlines
Deal found 9/15$149
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Thu 10/29:38 amDEC - ORD
Nonstop1h 15mUnited Airlines
Thu 10/97:45 amORD - DEC
Nonstop1h 06mUnited Airlines
Deal found 9/14$159
This United Airlines deal was found by Cheapflights users on 9/14. 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 9/269:38 amDEC - ORD
Nonstop1h 15mUnited Airlines
Sun 9/284:55 pmORD - DEC
Nonstop1h 09mUnited Airlines
Deal found 9/14$174
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Sun 9/289:38 amDEC - ORD
Nonstop1h 15mUnited Airlines
Wed 10/14:55 pmORD - DEC
Nonstop1h 09mUnited Airlines
Deal found 9/14$191
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Fri 9/196:55 pmDEC - ORD
Nonstop1h 15mUnited Airlines
Sun 9/217:50 amORD - DEC
Nonstop1h 06mUnited Airlines
Deal found 9/15$199
This United Airlines deal was found by Cheapflights users on 9/15. 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 9/289:38 amDEC - ORD
Nonstop1h 15mUnited Airlines
Mon 9/297:45 amORD - DEC
Nonstop1h 06mUnited Airlines
Deal found 9/15$241
This United Airlines deal was found by Cheapflights users on 9/15. 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 9/156:55 pmDEC - ORD
Nonstop1h 15mUnited Airlines
Tue 9/167:50 amORD - DEC
Nonstop1h 06mUnited Airlines
Deal found 9/15$391

Cheapflights Fare Finder

 
Customize your flight search to find flights from Decatur to Chicago 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 September 15, 2025.
Use the filters below to find and compare flights from Decatur to Chicago that are best for you.

Fly from

Decatur

Fly to

Chicago

Route

Depart

Return

Price

DecaturChicago

DEC - ORD

DECORD

Decatur Arpt

Mon 9/29

6:55 pm-8:10 pm

Nonstop1h 15m

Chicago O'Hare Intl

Mon 10/6

4:55 pm-6:04 pm

Nonstop1h 09m

$149

DecaturChicago

DEC - ORD

DECORD

Decatur Arpt

Mon 10/13

9:38 am-10:53 am

Nonstop1h 15m

Chicago O'Hare Intl

Mon 10/20

4:55 pm-6:04 pm

Nonstop1h 09m

$149

DecaturChicago

DEC - ORD

DECORD

Decatur Arpt

Sat 10/18

9:38 am-10:53 am

Nonstop1h 15m

Chicago O'Hare Intl

Mon 10/20

7:45 am-8:51 am

Nonstop1h 06m

$149

DecaturChicago

DEC - ORD

DECORD

Decatur Arpt

Thu 2/5

9:49 am-11:05 am

Nonstop1h 16m

Chicago O'Hare Intl

Mon 2/9

4:52 pm-6:01 pm

Nonstop1h 09m

$159

DecaturChicago

DEC - ORD

DECORD

Decatur Arpt

Thu 2/26

9:49 am-10:59 am

Nonstop1h 10m

Chicago O'Hare Intl

Mon 3/2

4:52 pm-5:56 pm

Nonstop1h 04m

$159

DecaturChicago

DEC - ORD

DECORD

Decatur Arpt

Sat 11/15

7:08 pm-8:19 pm

Nonstop1h 11m

Chicago O'Hare Intl

Wed 11/19

4:50 pm-5:52 pm

Nonstop1h 02m

$159

DecaturChicago

DEC - ORD

DECORD

Decatur Arpt

Thu 10/2

9:38 am-10:53 am

Nonstop1h 15m

Chicago O'Hare Intl

Thu 10/9

7:45 am-8:51 am

Nonstop1h 06m

$159

DecaturChicago

DEC - ORD

DECORD

Decatur Arpt

Tue 10/28

7:08 pm-8:19 pm

Nonstop1h 11m

Chicago O'Hare Intl

Tue 11/4

4:50 pm-5:52 pm

Nonstop1h 02m

$159

DecaturChicago

DEC - ORD

DECORD

Decatur Arpt

Fri 10/3

6:55 pm-8:10 pm

Nonstop1h 15m

Chicago O'Hare Intl

Fri 10/10

4:55 pm-6:04 pm

Nonstop1h 09m

$159

DecaturChicago

DEC - ORD

DECORD

Decatur Arpt

Tue 10/21

9:38 am-10:53 am

Nonstop1h 15m

$98

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 14 results
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Best time to book a flight from Decatur to Chicago

Have a flexible travel schedule? Discover the best time to fly to Chicago 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 Chicago

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

Currently, August is the cheapest month in which you can book a flight from Decatur, Illinois to Chicago (average of $245). Flying from Decatur, Illinois to Chicago in March is currently the most expensive (average of $321). 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 CHI?

Find hourly flight availability from Decatur to Chicago. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 2025.

When flying from Decatur, Illinois to Chicago, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 23% versus a flight in the afternoon.

Weekly flight availability from Decatur, Illinois to Chicago

Explore weekly flight availability from Decatur to Chicago. 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 September 15, 2025.

The most flights from DEC to CHI 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 Decatur to Chicago. 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 Chicago?

    If you book a flight to Chicago from Decatur, you will be flying from Decatur Arpt, which is the city’s only airport. Decatur Arpt (DEC) is located 4.7 mi from the center of Decatur. There is 1 flight from Decatur Arpt to Chicago per day from 1 airline.

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

    United Airlines can get you from Decatur, Illinois to Chicago in just under 1h 15m. Your travel time will be generally consistent. The distance from Decatur, Illinois to Chicago is about 156 mi. All flights are typically nonstop.

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

    While on average a flight from Decatur, Illinois to Chicago is generally $378, our data shows the cheapest flight currently is $97. When looking at the most popular route, (Decatur Arpt - Chicago O'Hare Intl), you can expect to pay $149 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Decatur to Chicago 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 Chicago?

    Currently, August is the cheapest month in which you can book a flight from Decatur, Illinois to Chicago (average of $245). Flying from Decatur, Illinois to Chicago in March is currently the most expensive (average of $321). 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.

See more FAQs

Traveling to a place near Chicago?

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Lansing
Hammond
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Porter
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Alternative routes for Decatur to Chicago

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Top airline flying from Decatur to Chicago

Discover the top airline that operate flights from Decatur to Chicago. 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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$148Average$158FlexibilityNo cancel feeOn-time69%

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