ORD to MDT flight delays & on-time performance
Nonstop flights from Chicago O'Hare International Airport to Harrisburg International Airport · 594 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at ORD or MDT right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Chicago (ORD) to Harrisburg (MDT) arrived on time 74% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 3.3% were cancelled, and 10% arrived an hour or more late.
- Republic Airways was the most punctual airline here (80% on time); American Airlines was the least (67%).
- Departures scheduled around 8am did best (84% on time); around 7pm did worst (53%).
- Saturday was the most reliable day to fly (79% on time) and Friday the least (71%).
- The largest source of delay minutes was late-arriving aircraft (46%).
Which airline is most on time from ORD to MDT?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Republic AirwaysRegional airline operating flights for American Eagle, Delta Connection and United Express. | 80% | 3.7% | 13 min | 8.2% | 355 |
| Envoy AirRegional airline operating American Eagle flights. | 78% | 2.7% | 15 min | 7.6% | 625 |
| United Airlines | 70% | 2.8% | 23 min | 10.3% | 602 |
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 69% | 3.9% | 25 min | 12.5% | 285 |
| American Airlines | 67% | 4.5% | 34 min | 14.7% | 264 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 7am73%124 flights
- 8am84%279 flights
- 9am79%55 flights
- 10am75%42 flights
- 11am65%53 flights
- 12pm72%32 flights
- 1pm77%444 flights
- 2pm77%81 flights
- 3pm76%130 flights
- 4pm70%133 flights
- 6pm64%337 flights
- 7pm53%72 flights
- 8pm74%202 flights
- 9pm74%127 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday71%5.3% cancelled
- Tuesday74%1.0% cancelled
- Wednesday75%1.7% cancelled
- Thursday76%3.2% cancelled
- Friday71%2.5% cancelled
- Saturday79%3.4% cancelled
- Sunday71%5.6% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft46%
- Airline (crew, maintenance, cleaning, fueling)26%
- Air traffic control & airport congestion18%
- Extreme weather10%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather76%
- Air traffic control & airport congestion21%
- Airline (crew, maintenance, cleaning, fueling)3%
- Security0%
ORD to MDT: common questions
- How often are ORD to MDT flights on time?
- 74% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Chicago to Harrisburg cancelled?
- 3.3% of scheduled flights were cancelled (70 of 2,131).
- How long are typical delays?
- Across all flights the average arrival delay was 20 min (early arrivals count as zero). Flights that were late arrived 73 min behind schedule on average, and 10.0% of flights were an hour or more late.
- How long is taxi time at ORD?
- Flights on this route spent 29 min taxiing from the gate to takeoff on average.
Related routes
Return trip: MDT to ORD — 75% on time
More flights from Chicago
More flights to Harrisburg
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: ORD → MDT, nonstop flights by US airlines that report to the DOT. How we calculate this.