Route · ORD → MDT · 2020–2025 BTS data
Chicago to Harrisburg
The ORD–MDT corridor (Chicago, IL → Harrisburg, PA) runs ahead of the national average, served by 24 carriers across roughly 594 miles.
Data updated 2026-06-13
- 80%
- On-time
- +1 pts
- vs US avg
- 68 min
- Delay when late
- 5,647
- Flights
Cancelled
1.5%
Best Month
Mar 2024 95%
Worst Month
May 2024 60%
Distance
594 mi
Carriers
24
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 160 | 51 | 5 | 0 | YX,MQ,UA,OO |
| Nov 2025 | 196 | 39 | 11 | 0 | OO,UA,MQ,YX |
| Oct 2025 | 171 | 34 | 0 | 0 | OO,UA,YX,MQ |
| Sep 2025 | 129 | 22 | 0 | 0 | UA,YX,MQ |
| Aug 2025 | 129 | 27 | 5 | 0 | OO,MQ,UA |
| Jul 2025 | 129 | 48 | 3 | 0 | OO,UA,MQ |
| Jun 2025 | 146 | 47 | 1 | 0 | OO,UA,MQ |
| May 2025 | 134 | 25 | 0 | 0 | OO,UA,YX,MQ |
| Apr 2025 | 140 | 25 | 1 | 0 | MQ,OO,UA,YX |
| Mar 2025 | 59 | 21 | 1 | 0 | YX,OO,UA |
| Feb 2025 | 72 | 19 | 0 | 0 | OO,UA,YX |
| Jan 2025 | 57 | 14 | 1 | 0 | OO,UA,YX |
| Dec 2024 | 64 | 22 | 0 | 0 | OO,UA |
| Nov 2024 | 79 | 16 | 0 | 0 | OO,UA |
| Oct 2024 | 92 | 12 | 0 | 1 | UA,OO,YX |
| Sep 2024 | 65 | 9 | 0 | 0 | YX,OO,UA |
| Aug 2024 | 74 | 27 | 1 | 0 | OO,UA |
| Jul 2024 | 83 | 24 | 2 | 0 | OO,UA |
| Jun 2024 | 79 | 27 | 1 | 0 | OO,UA |
| May 2024 | 95 | 38 | 2 | 0 | YX,OO,UA |
| Apr 2024 | 136 | 21 | 0 | 1 | OO,UA,YX |
| Mar 2024 | 64 | 3 | 0 | 0 | YX,UA |
| Feb 2024 | 58 | 5 | 0 | 0 | OO,UA,YX |
| Jan 2024 | 67 | 21 | 4 | 0 | YX,OO,UA |
Cancellation Rate
1.5%
38 of 2,478 flights
Diversion Rate
0.1%
2 of 2,478 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
ORD - Chicago
Full on-time, delay-cause, and seasonal performance for Chicago, IL.
Origin airport →MDT - Harrisburg
Full on-time, delay-cause, and seasonal performance for Harrisburg, PA.
Destination airport →Compare the two airports
See ORD and MDT side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to ORD–MDT.
Routes with a similar on-time rate
Routes of a similar trip length
What the Data Says About ORD to MDT
5,647 tracked flights put the ORD to MDT pairing (Chicago to Harrisburg) at a 80% on-time rate, squarely in line with the wider network. Delays that do occur run 68.4 minutes on average. Across the 594-mile route and its 24 carriers, the trailing 24 months show 1.5% cancelled and 0.1% diverted (2,478 flights sampled).
The monthly split is wide on this route: Mar 2024 posted the strongest performance at 95% on-time, while May 2024 came in at just 60% - a 35-point swing worth factoring into travel timing.
Frequently Asked Questions
How often are flights delayed from ORD to MDT? ▼
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Flight Guides
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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.