Route · DEC → ORD · 2020–2025 BTS data
Decatur to Chicago
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), DEC to ORD (Decatur to Chicago) ranks #3094 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 83.4%
- On-time
- +4.4 pts
- vs US avg
- 138 min
- Delay when late
- 3,543
- Flights
- #3094 of 4927
- Corpus placement
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 |
DEC–ORD seasonal on-time pattern
Best: April (89.7%) · weakest: June (78.0%)
Strongest calendar month
April
89.7% on-time · ~52 flights/mo
Busiest calendar month
January
~53 flights/mo avg
Weakest calendar month
June
78.0% on-time · ~52 flights/mo
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.
DEC on-time profileORD - Chicago
Full on-time, delay-cause, and seasonal performance for Chicago, IL.
ORD on-time profileCompare the two airports
See DEC and ORD side by side on delays, cancellations, and reliability.
Compare DEC vs ORDSimilar 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.
On the multi-year calendar, DEC–ORD peaks in April at 89.7% on-time while January carries the heaviest traffic (~53 flights per month) ; the softest month is June at 78.0%, a 11.7-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does DEC to ORD rank among US routes by traffic? ▼
How often are flights delayed from DEC to ORD? ▼
What is the cancellation rate for DEC to ORD? ▼
How far is the flight from DEC to ORD? ▼
When is the best time to fly from DEC to ORD? ▼
Airports on this route
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.
Using DEC–ORD data
DEC–ORD runs 4.4 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.
- Compare DEC and ORD airport profiles: delay causes and top routes differ even on the same corridor. DEC airport
- If your dates flex, April (89.7% on-time) beats June (78.0%) on this corridor. Seasonal chart
- 4 other routes post a similar 83.4% on-time rate; compare before you commit to this pairing. Similar routes
On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.
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.