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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 8/20. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — DEC
Aug 7 — Aug 141
Thu 8/7
Thu 8/14
1 adult, Economy
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Cheap flight deals from Illinois to Decatur

Keep the following information in mind while searching for Illinois to Decatur flight deals. Data was last updated August 2, 2025.

Round-trip from

$149
(United Airlines)

One-way from

$93
(United Airlines)
From Illinois to Decatur Arpt
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One-way flight from Illinois to Decatur Arpt
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Find 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 August 2, 2025.

This United Airlines deal was found by Cheapflights users on 7/31. 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 8/147:45 amORD - DEC
Nonstop1h 03mUnited Airlines
Mon 8/186:55 pmDEC - ORD
Nonstop1h 08mUnited Airlines
Deal found 7/31$149
This United Airlines deal was found by Cheapflights users on 7/30. 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 10/45:28 pmSTL - DEC
1 stop15h 23mUnited Airlines
Tue 10/79:38 amDEC - STL
1 stop4h 49mUnited Airlines
Deal found 7/30$286

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 August 2, 2025.
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 8/14

7:45 am-8:48 am

Nonstop1h 03m

Decatur Arpt

Mon 8/18

6:55 pm-8:03 pm

Nonstop1h 08m

$149

St. LouisDecatur

STL - DEC

STLDEC

Lambert-St Louis

Sat 10/4

5:28 pm-8:51 am

1 stop15h 23m

Decatur Arpt

Tue 10/7

9:38 am-2:27 pm

1 stop4h 49m

$286

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Wed 8/20

4:50 pm-5:59 pm

Nonstop1h 09m

$93

St. LouisDecatur

STL - DEC

STLDEC

Lambert-St Louis

Sun 8/10

1:25 pm-8:48 am

1 stop19h 23m

$424

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/31

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 August 2, 2025.

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 August 2, 2025.

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).

Reviews of airlines servicing Decatur

Get insights into the airlines that provide service to Decatur. 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 Decatur. Reviews last updated August 2, 2025.
Read through reviews of airlines operating flights from Illinois to Decatur, such as United Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,904 reviews

Entertainment

7.1

Overall

7.4

Crew

8.1

Boarding

7.7

Comfort

7.3

Food

6.6

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
8,904 reviews
United Airlines
7.4
Good
8,904 reviews

Entertainment

7.1

Overall

7.4

Crew

8.1

Boarding

7.7

Comfort

7.3

Food

6.6

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 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.

  • 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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