Atlanta (ATL) to Philadelphia (PHL): On-Time Performance
Data through May 2026
The calendar drives reliability on ATL–PHL. September 2025 flights landed on schedule 84% of the time, but June 2025 dropped to 56% — a gap of 28 points. Across the full period the route averages 73% on-time against a national 78%. Morning departures also hold up better than evening ones (84% vs 64%), which matters most in the rough months.
- On-time
- 73%
- arrived <15 min late
- Avg delay
- 21 min
- completed flights
- Cancelled
- 2.2%
- Flights/day
- 16
- last 12 months
- Duration
- 2h 2m
- scheduled
- Distance
- 666 mi
Best airline from ATL to PHL
7 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Republic Airwaysmost reliable | 86% | 16 min | 3.6% | 197 |
| Southwest Airlines | 85% | 9 min | 0.3% | 362 |
| PSA Airlines | 78% | 22 min | 3.9% | 1,520 |
| Spirit Airlines | 76% | 16 min | 2.3% | 484 |
| American Airlines | 75% | 31 min | 2.1% | 1,121 |
| Delta Air Lines | 74% | 16 min | 1.7% | 5,947 |
| Frontier Airlines | 61% | 34 min | 2.7% | 1,819 |
Monthly on-time trend
Best time to fly from ATL to PHL
Aim for departures around 6 a.m. (94% on-time); avoid 9 p.m. departures (48%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 70% | 25 min |
| Tuesdaybest | 79% | 16 min |
| Wednesday | 78% | 15 min |
| Thursday | 73% | 21 min |
| Friday | 73% | 22 min |
| Saturday | 74% | 19 min |
| Sunday | 68% | 30 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft44%
- Airline operations37%
- National airspace system17%
- Weather4%
Frequently asked questions
- How often are flights from ATL to PHL delayed?
- 27% of ATL–PHL flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 21 minutes.
- Which airline is most reliable from ATL to PHL?
- Republic Airways has the best on-time record on this route at 86%, based on 197 flights. 7 airlines flew ATL–PHL frequently enough to compare in this period.
- What is the best time of day to fly from ATL to PHL?
- Departures around 6 a.m. have the best record (94% on-time), while departures around 9 p.m. have the worst (48%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from ATL to PHL?
- The scheduled ATL–PHL flight time averages 2h 2m over 666 miles. Actual arrival times vary — flights on this route land 15+ minutes late 27% of the time.
- How often are ATL to PHL flights cancelled?
- 2.2% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, slightly above the national rate of 1.6%.
- What is the worst month to fly from ATL to PHL?
- June 2025 was the roughest month in this dataset, with only 56% of arrivals on time. The best was September 2025 at 84%. If your dates are flexible, that 28-point gap is worth planning around.
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Based on 11,450 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.