According to PlainFlights' airport traffic ranking (BTS On-Time Performance total flights), Harrisburg, PA (MDT) ranks #137 of 382 tracked US airports by total flights (most flights = #1). Harrisburg, PA posts below-median on-time performance among the 382 tracked U.S. airports, as a mid-size U.S. airport.
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MDT on-time rate vs. the national average
Ahead of the U.S. average across all 382 tracked airports.
Delay Cause Breakdown
Top delay cause: Carrier.
Total delay minutes: 438,127.
Late Aircraft35.3% (154,575 min)
Carrier40.8% (178,837 min)
NAS (National Aviation System)16.3% (71,291 min)
Weather7.5% (32,981 min)
Security0.1% (443 min)
MDT - seasonal on-time pattern
Best: November (93.9%) · worst: July (89.7%)
MDT - on-time rate by year
2020–2025, year-over-year trend.
MDT - taxi-out and taxi-in (monthly)
Average taxi-out 15.4 min · taxi-in 6 min over the last 24 reported months (U.S. airport mean taxi-out ≈ 16.4 min).
MDT's average taxi-out (15.4 min) sits near the recent U.S. airport mean (~16.4 min). Month-to-month, it swings from 13.7 min (August 2025) to 20.4 min (February 2025).
Two PlainFlights-derived comparison paths for Harrisburg, PA, both outside Pennsylvania so the neighborhoods are not same-state geography. Axes stay disjoint: volume peers exclude the on-time peer set. Same-state compare stays below.
The standout signal at Harrisburg, PA is the delay mix: Carrier owns 40.8% of 438,127 delay minutes across 60,271 BTS flights. The on-time headline is 82.8% (3.8 pts above the 79% national average), with 10,338 delayed and 785 cancelled (1.30%).
Delay minutes concentrate in Carrier (35.3% late-aircraft, 40.8% carrier, 16.3% NAS, 7.5% weather, 0.1% security). Mid-volume books still show a clear delay fingerprint rather than a weather-only story.
On the multi-year calendar, MDT is strongest in November (93.9% on-time) and weakest in July (89.7%), a 4.2-point swing. Volume peaks in July (~939 flights/month). The busiest connecting route is to CLT (Charlotte) at 81.4% on-time. Field definitions: on-time performance explained.
Harrisburg, PA vs. the national on-time distribution
On-time rate among all 382 tracked U.S. airports
82.8%Top 57%higher than 43% of 382 airports
Harrisburg, PA
60%95%
U.S. airports by on-time rate, bucketed by value
Each bar is a band; taller bars hold more airports. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data (2020–2025).
Statistics reflect cumulative performance across all available reporting periods. On-time rates exclude cancelled and diverted flights.
MDT's on-time book is mid-pack; month and delay-cause mix move more than the headline rate.
Check the busiest route from MDT before you book a connection. See top routes →
Travel in November rather than July if your dates are flexible. Seasonal patterns →
Gate-to-wheels taxi-out averages 15.4 min here; check the monthly series before a tight connection. Taxi times →
On-time rate reflects the BTS historical average across all reporting carriers at this airport, not any single flight or airline.
Frequently Asked Questions
What is Harrisburg, PA's on-time rate?
Harrisburg, PA (MDT) has a 82.8% on-time rate across 60,271 BTS-tracked flights (2020-2025), 3.8 pts above the 79% national flight-weighted average; that places it in roughly the below-median on-time performance.
How does MDT rank among U.S. airports by traffic volume?
Harrisburg, PA ranks #137 of 382 tracked US airports by total BTS flights (most flights = #1), making it a mid-size U.S. airport.
What's the most common cause of delays at Harrisburg, PA?
Carrier is the leading delay cause at MDT, accounting for 40.8% of delay minutes. The full breakdown: 35.3% late-aircraft, 40.8% carrier, 16.3% NAS/air-traffic-control, 7.5% weather, and 0.1% security.
When is the best time to fly through Harrisburg, PA?
November is historically MDT's strongest month at 93.9% on-time, while July is the weakest at 89.7%, a 4.2-point swing across the BTS historical record.
Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights