How often are ORD to MDT flights on time?

Flights from Chicago (ORD) to Harrisburg (MDT) arrive on time 83% of the time across 11,987 flights of official data.

Which airline is most reliable on the ORD to MDT route?

American Airlines has the best on-time record on this route at 84% across 5,075 flights.

Route reliability

Flights from Chicago to Harrisburg arrive on time 83% of the time across 11,987 flights. Here’s how each airline really performs.

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On-time rate

11,987 flights

Airline	On-time	Flights
American Airlines	84%	5,075
United Airlines	82%	6,912

On-time = arrived within 15 minutes of schedule, per BTS TranStats. Compare the reverse leg MDT → ORD.

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Score real ORD–MDT flights on reliability, weather, and connection safety — not just price.

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