Historical on-time performance
Atlanta to Harrisburg
619 miData through May 2026Source: US DOT · BTS
Flights on ATL–MDT arrive on time 79% of the time over the last 12 months.
On-time rate79%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled2.3%of scheduled flights
based on 974 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesOn-time79%Medianon timep9035 minCancel2.3%Flights974
Why flights run late
Delay causes
- Airline41%
- Weather6%
- Air traffic (NAS)19%
- Late aircraft33%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline59%
- Weather41%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 22 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly ATL → MDT
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 82% to 88% on time.
- Middays88% on time · p90 15 min · 355 flights
- Mornings87% on time · p90 20 min · 691 flights
- Afternoons84% on time · p90 25 min · 843 flights
- Overnights82% on time · p90 30 min · 1,040 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 80% to 89% on time.
- Wednesdays89% on time · p90 15 min · 442 flights
- Tuesdays88% on time · p90 15 min · 442 flights
- Thursdays86% on time · p90 25 min · 441 flights
- Saturdays85% on time · p90 20 min · 314 flights
- Mondays83% on time · p90 30 min · 445 flights
- Fridays82% on time · p90 35 min · 444 flights
- Sundays80% on time · p90 35 min · 435 flights
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