Route · DEC → ORD · 2020–2025 BTS data
Decatur to Chicago
The DEC–ORD corridor (Decatur, IL → Chicago, IL) runs ahead of the national average, served by 1 carrier across roughly 156 miles.
Data updated 2026-06-13
- 83.4%
- On-time
- +4.4 pts
- vs US avg
- 138 min
- Delay when late
- 3,543
- Flights
Cancelled
2.1%
Best Month
Oct 2024 92%
Worst Month
Oct 2025 61%
Distance
156 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 55 | 19 | 4 | 1 | OO |
| Nov 2025 | 50 | 17 | 3 | 0 | OO |
| Oct 2025 | 54 | 21 | 0 | 0 | OO |
| Sep 2025 | 51 | 12 | 0 | 0 | OO |
| Aug 2025 | 53 | 14 | 2 | 0 | OO |
| Jul 2025 | 53 | 13 | 4 | 0 | OO |
| Jun 2025 | 52 | 16 | 0 | 0 | OO |
| May 2025 | 53 | 10 | 1 | 0 | OO |
| Apr 2025 | 51 | 8 | 0 | 0 | OO |
| Mar 2025 | 53 | 13 | 0 | 0 | OO |
| Feb 2025 | 48 | 13 | 1 | 0 | OO |
| Jan 2025 | 54 | 14 | 2 | 0 | OO |
| Dec 2024 | 53 | 16 | 0 | 0 | OO |
| Nov 2024 | 52 | 9 | 0 | 0 | OO |
| Oct 2024 | 53 | 4 | 0 | 0 | OO |
| Sep 2024 | 52 | 12 | 0 | 0 | OO |
| Aug 2024 | 53 | 17 | 0 | 1 | OO |
| Jul 2024 | 53 | 14 | 0 | 0 | OO |
| Jun 2024 | 52 | 12 | 0 | 1 | OO |
| May 2024 | 54 | 18 | 2 | 0 | OO |
| Apr 2024 | 51 | 10 | 0 | 0 | OO |
| Mar 2024 | 53 | 10 | 0 | 0 | OO |
| Feb 2024 | 50 | 7 | 0 | 0 | OO |
| Jan 2024 | 52 | 9 | 7 | 0 | OO |
Cancellation Rate
2.1%
26 of 1,255 flights
Diversion Rate
0.2%
3 of 1,255 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
DEC - Decatur
Full on-time, delay-cause, and seasonal performance for Decatur, IL.
Origin airport →ORD - Chicago
Full on-time, delay-cause, and seasonal performance for Chicago, IL.
Destination airport →Compare the two airports
See DEC and ORD side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to DEC–ORD.
Routes with a similar on-time rate
What the Data Says About DEC to ORD
Bureau of Transportation Statistics records show Decatur to Chicago (DEC to ORD) running a 83.4% on-time rate over 3,543 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 137.5 minutes. The 156-mile corridor is served by 1 carrier, and over the last 24 months 2.1% of 1,255 flights were cancelled, 0.2% diverted.
The monthly split is wide on this route: Oct 2024 posted the strongest performance at 92% on-time, while Oct 2025 came in at just 61% - a 31-point swing worth factoring into travel timing.
Frequently Asked Questions
How often are flights delayed from DEC to ORD? ▼
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Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.