$98 Find Cheap Flights from Decatur to Illinois - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Decatur to Illinois departing on 8/27. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Book Cheap Decatur to Illinois Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Decatur to Illinois that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Decatur to Illinois

Mon, Sep 21 - Mon, Sep 28
United Airlines Logo
7:20 pm - 8:37 pmDEC  Decatur Arpt-ORD Chicago O'Hare Intl
1h 17mnonstop
United Airlines Logo
7:25 am - 8:35 amORD  Chicago O'Hare Intl-DEC Decatur Arpt
1h 10mnonstop
$149United Airlines
Sun, Aug 30 - Sun, Sep 6
United Airlines Logo
9:12 am - 10:29 amDEC  Decatur Arpt-ORD Chicago O'Hare Intl
1h 17mnonstop
United Airlines Logo
4:45 pm - 5:59 pmORD  Chicago O'Hare Intl-DEC Decatur Arpt
1h 14mnonstop
$149United Airlines
Sat, Sep 19 - Mon, Sep 28
United Airlines Logo
7:20 pm - 8:37 pmDEC  Decatur Arpt-ORD Chicago O'Hare Intl
1h 17mnonstop
United Airlines Logo
5:30 pm - 6:43 pmORD  Chicago O'Hare Intl-DEC Decatur Arpt
1h 13mnonstop
$149United Airlines
Thu, Sep 10 - Thu, Sep 17
United Airlines Logo
7:20 pm - 8:37 pmDEC  Decatur Arpt-ORD Chicago O'Hare Intl
1h 17mnonstop
United Airlines Logo
5:30 pm - 6:44 pmORD  Chicago O'Hare Intl-DEC Decatur Arpt
1h 14mnonstop
$149United Airlines
Sat, Aug 15 - Fri, Aug 21
United Airlines Logo
7:20 pm - 8:37 pmDEC  Decatur Arpt-ORD Chicago O'Hare Intl
1h 17mnonstop
United Airlines Logo
6:27 am - 7:37 amORD  Chicago O'Hare Intl-DEC Decatur Arpt
1h 10mnonstop
$149United Airlines
Thu, Sep 10 - Thu, Sep 17
United Airlines Logo
7:20 pm - 8:37 pmDEC  Decatur Arpt-ORD Chicago O'Hare Intl
1h 17mnonstop
United Airlines Logo
5:30 pm - 6:44 pmORD  Chicago O'Hare Intl-DEC Decatur Arpt
1h 14mnonstop
$159United Airlines
Fri, Sep 11 - Sun, Sep 13
United Airlines Logo
7:20 pm - 8:37 pmDEC  Decatur Arpt-ORD Chicago O'Hare Intl
1h 17mnonstop
United Airlines Logo
6:55 am - 8:05 amORD  Chicago O'Hare Intl-DEC Decatur Arpt
1h 10mnonstop
$159United Airlines
Booking Insights

KAYAK's insights & trends for Decatur to Illinois flights

Get data-powered insights and trends into flights from Decatur to Illinois to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest Decatur to Illinois flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Illinois from Decatur found in the last 5 days was to Chicago, at $158 round-trip. The most popular route is from Decatur (DEC) to Chicago O'Hare Intl Airport (ORD), and the cheapest round-trip airline ticket found on this route in the last 5 days was $158.

What is the cheapest time of day to fly to Illinois?

The average price for all round-trip flights from Decatur to Illinois depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Illinois is generally at night, when round-trip flights cost $349 on average. Morning departures are around 31% cheaper than evening flights, on average. The most expensive time of day to fly to Illinois is generally in the evening, which is peak travel time and where the average cost of a ticket is $586.

What is the cheapest month to fly from Decatur to Illinois?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Decatur to Illinois, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Decatur to Illinois is January, when tickets cost $0 (return) on average. On the other hand, the most expensive months are August and October, when the average cost of round-trip tickets is $290 and $228 respectively.

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Good to know

Cheapest flight

$98
Flight from Decatur to Chicago

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Decatur to Illinois?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Decatur to Illinois.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Decatur to Illinois?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Decatur to Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Decatur to Illinois?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Decatur to Illinois with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Decatur to Illinois?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Decatur to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding cheap flights to Illinois

  • Looking for a cheap flight? 25% of our users found tickets from Decatur to the following destinations at these prices or less: Chicago $268 one-way - $324 round-trip

Reviews of the top airline flying from Decatur to Illinois

 
See real verified KAYAK customer reviews for airlines flying from Decatur to Illinois. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Decatur to Illinois? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 10058 reviews
6.7Food
7.3Comfort
7.7Boarding
7.1Entertainment
8.1Crew
Airline reviews

The flight crew were very helpful. The seats were very close together. There was barely room to sit without touching the person next to you.

4.0 OkayN, Jul 2026
Read more United Airlines reviews

The flight crew were very helpful. The seats were very close together. There was barely room to sit without touching the person next to you.

I’m an EP on AA every year for more than a decade but this was a very pleasant and surprising experience. Clean and sizable plane for HOU to CHI. 5 row first class. And excellent food in first class the steak option was really good. Your flight attendants even better. Seat 5A

Gluten free snack options and meals that offer both gluten free and dairy free.

boarded early to only find out that flight would sit at gate for 45 min to an hour. Landed in chicago and sat on runway for over an hour before got to gate. Total delay was extensive for a 45 min flight door to door.

Weather delay in Chicago?. No sense of urgency to make connection in Chicago for our connecting flight that wasn't delayed. Connection was missed.

It was fine, definitely older planes with no charging or anything. There’s no entertainment set up on board, but it is nice that they allow you to access the in flight entertainment from your phone without having to pay for the Wi-Fi and they do offer free texting.

The schedule to Moline changed 5 times. The gate changed 6 times. That is a pathetic way to run an airline. No wonder that no one in our company flies on United Express to or from Moline. Changes happen most of the time. I learned my lesson on this trip…never again!

The plane was in Moline all night. Consequently, we assumed an on time departure at 8:15am. Unfortunately, and as is the normal case with United in Moline, we departed 2.5 hours late. When the crew came, it was discovered that there was very little heat in the plane. Seems this should have been checked hours before the crew arrived. Then when we boarded and the plane was to be de-iced, the United de-icing truck was not working! We awaited the American Airlines truck. All of this caused us to miss our connection in Chicago. My suggestion is never take United Airlines flight from Moline. We have been disappointed 80% of the time and have vowed to not take United again from Moline.

The flight was delayed instead of leaving at 11 it left at 12.20

Too short a flight to have service offered. A free simple snack offer (eg, biscuits), as in the old times, would have been nice.

Everything you need to know for your flight from Decatur to Illinois

Information on your arrival and departure airports

Decatur (DEC)