Historical on-time performance
Atlanta to Harrisburg
620 miData through Dec 2025Source: US DOT · BTS
Flights on ATL–MDT arrive on time 81% of the time over the last 12 months.
On-time rate81%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled0.8%of scheduled flights
based on 955 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesOn-time81%Medianon timep9035 minCancel0.8%Flights955
Why flights run late
Delay causes
- Airline42%
- Weather14%
- Air traffic (NAS)11%
- Late aircraft32%
- Security0%
Most delay minutes here are attributed to Airline.
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 (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 84% to 90% on time.
- Middays90% on time · p90 10 min · 330 flights
- Mornings89% on time · p90 15 min · 725 flights
- Afternoons85% on time · p90 20 min · 841 flights
- Overnights84% on time · p90 25 min · 1,043 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 81% to 90% on time.
- Tuesdays90% on time · p90 10 min · 443 flights
- Wednesdays89% on time · p90 15 min · 444 flights
- Saturdays88% on time · p90 15 min · 319 flights
- Thursdays87% on time · p90 25 min · 440 flights
- Mondays86% on time · p90 20 min · 448 flights
- Fridays84% on time · p90 25 min · 443 flights
- Sundays81% on time · p90 35 min · 436 flights
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