HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Chicago

$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 9/19. Fares are subject to change and may not be available on all flights or dates of travel.
DEC — CHI
Sep 5 — Sep 121
Sat 9/5
Sat 9/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Decatur to Chicago with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 August 6, 2026.

This United Airlines deal was found by Cheapflights users on 8/1. 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 9/107:20 pm -
Nonstop1h 17m
Thu 9/175:30 pm -
Nonstop1h 14m
Deal found 8/1$149
This United Airlines deal was found by Cheapflights users on 8/3. 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.
Thu 9/37:20 pm -
Nonstop1h 17m
Sun 9/64:45 pm -
Nonstop1h 14m
Deal found 8/3$159
This United Airlines deal was found by Cheapflights users on 8/5. 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.
Wed 8/129:12 am -
Nonstop1h 17m
Wed 8/264:45 pm -
Nonstop1h 14m
Deal found 8/5$174
This United Airlines deal was found by Cheapflights users on 8/2. 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.
Mon 8/179:12 am -
Nonstop1h 17m
Fri 8/216:27 am -
Nonstop1h 10m
Deal found 8/2$191
This United Airlines deal was found by Cheapflights users on 8/1. 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.
Fri 8/76:45 pm -
Nonstop1h 08m
Sun 8/97:45 am -
Nonstop1h 12m
Deal found 8/1$199
This United Airlines deal was found by Cheapflights users on 8/1. 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.
Mon 8/109:37 am -
Nonstop1h 08m
Sat 8/154:45 pm -
Nonstop1h 14m
Deal found 8/1$241
This United Airlines deal was found by Cheapflights users on 8/1. 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.
Sun 8/29:37 am -
Nonstop1h 08m
Mon 8/37:45 am -
Nonstop1h 12m
Deal found 8/1$391

Find 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 August 6, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$149
(United Airlines)

One-way from

$98
(United Airlines)

Good round-trip deal

$324 or less

Good one-way deal

$268 or less
Provider with most accurate pricing for Decatur Arpt-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Decatur Arpt-Chicago (CHI) flights.
Search Deals
From Decatur Arpt to Chicago (CHI)
Search Deals
One-way flight from Decatur Arpt to Chicago (CHI)
Search Deals
Price to beat on a round-trip flight from Decatur Arpt to Chicago (CHI).
Search Deals
Price to beat on a one-way flight from Decatur Arpt to Chicago (CHI).
Search Deals

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 August 6, 2026.
Use the filters below to find and compare flights from Decatur to Chicago that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DecaturChicago

DEC Decatur Arpt - ORD Chicago O'Hare Intl

DECORD

Decatur Arpt

Thu 9/10

7:20 pm-8:37 pm

Nonstop1h 17m

Chicago O'Hare Intl

Thu 9/17

5:30 pm-6:44 pm

Nonstop1h 14m

$149

DecaturChicago

DEC Decatur Arpt - ORD Chicago O'Hare Intl

DECORD

Decatur Arpt

Thu 9/3

7:20 pm-8:37 pm

Nonstop1h 17m

Chicago O'Hare Intl

Thu 9/10

6:55 am-8:05 am

Nonstop1h 10m

$149

DecaturChicago

DEC Decatur Arpt - ORD Chicago O'Hare Intl

DECORD

Decatur Arpt

Mon 9/21

7:20 pm-8:37 pm

Nonstop1h 17m

Chicago O'Hare Intl

Mon 9/28

7:25 am-8:35 am

Nonstop1h 10m

$149

DecaturChicago

DEC Decatur Arpt - ORD Chicago O'Hare Intl

DECORD

Decatur Arpt

Sun 8/30

9:12 am-10:29 am

Nonstop1h 17m

Chicago O'Hare Intl

Sun 9/6

4:45 pm-5:59 pm

Nonstop1h 14m

$149

DecaturChicago

DEC Decatur Arpt - ORD Chicago O'Hare Intl

DECORD

Decatur Arpt

Thu 9/3

7:20 pm-8:37 pm

Nonstop1h 17m

Chicago O'Hare Intl

Sun 9/6

4:45 pm-5:59 pm

Nonstop1h 14m

$159

DecaturChicago

DEC Decatur Arpt - ORD Chicago O'Hare Intl

DECORD

Decatur Arpt

Fri 9/11

7:20 pm-8:37 pm

Nonstop1h 17m

Chicago O'Hare Intl

Sun 9/13

6:55 am-8:05 am

Nonstop1h 10m

$159
Quickest round-trip

DecaturChicago

DEC Decatur Arpt - ORD Chicago O'Hare Intl

DECORD

Decatur Arpt

Mon 11/23

9:34 am-10:43 am

Nonstop1h 09m

Chicago O'Hare Intl

Thu 11/26

4:45 pm-5:55 pm

Nonstop1h 10m

$159
Cheapest one-way
Quickest one-way

DecaturChicago

DEC Decatur Arpt - ORD Chicago O'Hare Intl

DECORD

Decatur Arpt

Sat 9/19

7:20 pm-8:37 pm

Nonstop1h 17m

$98

DecaturChicago

DEC Decatur Arpt - ORD Chicago O'Hare Intl

DECORD

Decatur Arpt

Sat 10/3

7:18 pm-8:35 pm

Nonstop1h 17m

$98

DecaturChicago

DEC Decatur Arpt - ORD Chicago O'Hare Intl

DECORD

Decatur Arpt

Thu 8/27

9:12 am-10:29 am

Nonstop1h 17m

$98

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/5

Showing 1-10 of 11 resultsSorted by cheapest first
1
2

Compare providers for flights from Decatur to Chicago

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Decatur to Chicago in August.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Decatur, Illinois-Chicago flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Decatur, Illinois-Chicago flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Decatur, Illinois-Chicago flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Decatur, Illinois-Chicago flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Decatur, Illinois-Chicago flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 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 August 6, 2026.

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 in the evening, which can drop the price by up to 58% versus a flight at noon.

What is the cheapest day to fly from Decatur, Illinois to Chicago?

Use this chart to determine the cheapest time to fly round-trip from Decatur to Chicago. Price data was last updated on August 1, 2026.

Travelers seeking maximum savings on their Decatur, Illinois to Chicago flight should consider departing on Thursday evenings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 17m. 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 $370, our data shows the cheapest flight currently is $158. 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.

See more FAQs

Traveling to a place near Chicago?

Book flights to Chicago if you plan to visit one of these locations
Benton Harbor
Lansing
Merrillville
Valparaiso
Hammond
Saint Joseph
Porter

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 August 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$148Average$198FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.