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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 7/30. Fares are subject to change and may not be available on all flights or dates of travel.
DEC — CHI
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
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 junio 12, 2025.

Round-trip from

$149
(United Airlines)

One-way from

$98
(United Airlines)

Good round-trip deal

$324 or less

Good one-way deal

$365 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 junio 12, 2025.

This United Airlines deal was found by Cheapflights users on 6/10. 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.
jue. 7/246:55 pmDEC - ORD
Nonstop1h 08mUnited Airlines
lun. 7/287:45 amORD - DEC
Nonstop1h 03mUnited Airlines
Deal found 6/10$149

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 junio 12, 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

jue. 7/24

6:55 pm-8:03 pm

Nonstop1h 08m

Chicago O'Hare Intl

lun. 7/28

7:45 am-8:48 am

Nonstop1h 03m

$149

DecaturChicago

DEC - ORD

DECORD

Decatur Arpt

mié. 7/30

6:55 pm-8:03 pm

Nonstop1h 08m

$98

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

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 junio 12, 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 25% 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 junio 12, 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).

Rainfall in Chicago by month

Plan your trip to Chicago by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Chicago ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Chicago when rainfall is around 1.7 in.

Temperature in Chicago by month

Plan your trip to Chicago by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Chicago, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

Reviews of airlines servicing Chicago

Get insights into the airlines that provide service to Chicago. 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 Chicago. Reviews last updated junio 12, 2025.
United Airlines
7.4
Good
8,790 reviews

Food

6.6

Boarding

7.7

Entertainment

7.0

Overall

7.4

Comfort

7.3

Crew

8.1

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
8,790 reviews
United Airlines
7.4
Good
8,790 reviews

Food

6.6

Boarding

7.7

Entertainment

7.0

Overall

7.4

Comfort

7.3

Crew

8.1

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 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.

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

    While on average a flight from Decatur, Illinois to Chicago is generally $419, our data shows the cheapest flight currently is $147. 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 Decatur?

Book flights to Decatur if you plan to visit one of these locations
Merrillville
Lansing
Benton Harbor
Porter
Hammond
Valparaiso
Chesterton

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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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$148Average$158FlexibilityNo cancel feeOn-time69%

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