FlightRecord

Harrisburg International Airport (MDT): Delays & On-Time Performance

Data through May 2026

Harrisburg International Airport (MDT) is a tale of two seasons: departures ran 88% on-time in October 2024 but sank to 68% in December 2025. Across the year it averages 79% against a national 78%, over roughly 15 departures a day to 22 destinations.

Departures on-time
79%
left <15 min late
Avg dep delay
21 min
Arrivals on-time
75%
Cancelled
1.7%
Destinations
22
nonstop
Airlines
10

Monthly on-time trend

Monthly departure on-time percentage at MDT50%75%100%June 2024: 78% on-time (503 flights)78Jun 2024July 2024: 72% on-time (504 flights)72August 2024: 76% on-time (467 flights)76September 2024: 82% on-time (428 flights)82Sep 2024October 2024: 88% on-time (488 flights)88November 2024: 85% on-time (458 flights)85December 2024: 75% on-time (414 flights)75Dec 2024January 2025: 79% on-time (306 flights)79February 2025: 78% on-time (345 flights)78March 2025: 84% on-time (422 flights)84Mar 2025April 2025: 86% on-time (483 flights)86May 2025: 84% on-time (479 flights)84June 2025: 74% on-time (453 flights)74Jun 2025July 2025: 76% on-time (423 flights)76August 2025: 80% on-time (410 flights)80September 2025: 84% on-time (357 flights)84Sep 2025October 2025: 82% on-time (475 flights)82November 2025: 83% on-time (473 flights)83December 2025: 68% on-time (443 flights)68Dec 2025January 2026: 79% on-time (485 flights)79February 2026: 78% on-time (454 flights)78March 2026: 70% on-time (474 flights)70Mar 2026April 2026: 79% on-time (537 flights)79May 2026: 84% on-time (560 flights)84

Best time of day to depart from MDT

On-time percentage by scheduled departure hour at MDT5 a.m.: 93% on-time (530 flights)56 a.m.: 89% on-time (2,863 flights)67 a.m.: 87% on-time (170 flights)78 a.m.: 90% on-time (443 flights)89 a.m.: 83% on-time (267 flights)910 a.m.: 78% on-time (514 flights)1011 a.m.: 79% on-time (787 flights)1112 p.m.: 78% on-time (618 flights)121 p.m.: 85% on-time (418 flights)132 p.m.: 71% on-time (146 flights)143 p.m.: 68% on-time (502 flights)154 p.m.: 72% on-time (498 flights)165 p.m.: 74% on-time (1,374 flights)176 p.m.: 69% on-time (887 flights)187 p.m.: 70% on-time (252 flights)198 p.m.: 60% on-time (368 flights)209 p.m.: 46% on-time (158 flights)21scheduled departure hour

Busiest routes from MDT

RouteFlights/12moOn-timeAvg delay
MDT → ORD2,03276%20 min
MDT → ATL97585%14 min
MDT → CLT72782%20 min
MDT → DFW36583%19 min
MDT → SFB27862%44 min
MDT → DTW25882%20 min
MDT → PIE16466%26 min
MDT → PGD15677%19 min

Most reliable routes

  1. MDT → ATL85%
  2. MDT → SRQ85%
  3. MDT → DFW83%
  4. MDT → CLT82%
  5. MDT → DTW82%

Most delay-prone routes

  1. MDT → SFB62%
  2. MDT → PIE66%
  3. MDT → MCO74%
  4. MDT → ORD76%
  5. MDT → PGD77%

Airline performance at MDT

AirlineOn-time departuresAvg delayFlights
United Airlines87%11 min941
Republic Airways85%10 min434
PSA Airlines84%21 min660
Delta Air Lines83%15 min1,913
American Airlines82%19 min2,243
SkyWest Airlines78%26 min1,502
Envoy Air76%19 min873
Frontier Airlines72%31 min215
Allegiant Air71%30 min2,014

Frequently asked questions

How often are flights delayed at MDT?
21% of departures from Harrisburg International Airport left 15+ minutes late between 2024-06 and 2026-05, with an average departure delay of 21 minutes. The national on-time average over the same period was 78%.
What is the best time of day to depart from MDT?
Flights scheduled around 5 a.m. depart on time 93% of the time at MDT, versus 46% around 9 p.m.. Booking before noon is the usual rule of thumb here.
What is the worst month for delays at MDT?
In this dataset, December 2025 was the weakest month at MDT, with 68% of departures on time.
How often are flights cancelled at MDT?
1.7% of scheduled departures from MDT were cancelled in this period, compared with a national rate of 1.6%.

Popular route pages from this airport

Based on 10,841 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.