Route on-time record
MDT to ATL: most on-time flights and the best time to fly
Harrisburg (Harrisburg International Airport) to Atlanta (Hartsfield Jackson Atlanta International Airport). 975 nonstop flights in Jun 2025 to May 2026, 85% arrived within 15 minutes and 2.4% were cancelled. The most reliable flight number was Delta 1255 at 6:00 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
MDT → ATL
Harrisburg to Atlanta: 975 nonstop flights a year
On time (12 months)
85%
Cancelled
2.4%
avg delay 13 min
Best time to leave
Before 9 AM
91% on time vs 79% 6 to 9 PM
Most reliable airline
Delta
83% chance on time
Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · Delta 1255
6:00 AM → 8:10 AM2h 04m nonstop
Local times, typical schedule. Last flown 2026-05-31.
88%
chance on time
- On time (history)
- 91%
- Cancelled
- 2.9%
- Avg arrival delay
- 8 min
- Arrived on time 91% of the time (339 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 91% on time; 6 to 9 PM: 79%).
Strong track record · 339 flights
Find Delta 1255 fares Opens this date on Aviasales#2 · Delta 1248
1:24 PM → 2:04 PM2h 04m nonstop
Local times, typical schedule. Last flown 2026-05-31.
82%
chance on time
- On time (history)
- 84%
- Cancelled
- 2.1%
- Avg arrival delay
- 17 min
- Arrived on time 84% of the time (333 flights, Jun 2025 to May 2026).
- Lands inside ATL's trouble window: 59% of its 96 ground stops and delay programs started between 1 PM and 7 PM.
Strong track record · 333 flights
Find Delta 1248 fares Opens this date on Aviasales#3 · Delta 2857
6:32 PM → 8:49 PM2h 12m nonstop
Local times, typical schedule. Last flown 2026-05-31.
79%
chance on time
- On time (history)
- 80%
- Cancelled
- 2.1%
- Avg arrival delay
- 16 min
- Arrived on time 80% of the time (271 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 79% on time; Before 9 AM: 91%).
Strong track record · 271 flights
Find Delta 2857 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Delta Air Lines83%
974 flights · 85% on time as flown · 2.4% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM91%
350 flights · avg delay 8 min
- 9 AM to noon86%
183 flights · avg delay 19 min
- Noon to 3 PM81%
158 flights · avg delay 14 min
- 6 to 9 PM79%
255 flights · avg delay 17 min
Best day: Wednesday (90%). Worst: Monday (83%).
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Airline (crew, maintenance, boarding)58%
- Late-arriving aircraft23%
- Air traffic control and airport volume12%
- Severe weather8%
Share of delay minutes by the cause airlines report to the US DOT.
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure
MDT to ATL questions
- What time of day is best to fly MDT to ATL?
- Before 9 AM: 91% of flights arrived on time, against 79% for departures 6 to 9 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from MDT to ATL?
- Delta, with a season-adjusted 83% chance of operating and arriving on time over 974 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on MDT to ATL?
- January (78% on time); the best was September (92%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from MDT
Live status: FAA delays and ground stops