Best Time to Fly ATL to PHL: On-Time Stats by Hour & Airline
Hartsfield-Jackson Atlanta International → Philadelphia International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 75.1% of Atlanta (ATL) to Philadelphia (PHL) flights arrived on time (5,749 scheduled flights). That is 2.6 points below the national average of 77.6%.
Among 6 airlines, Republic Airways led with 90.5% on time and Frontier Airlines was last with 62.1%.
Over 24 months, Wednesday was the most reliable day (79% on time) and July the worst month (59%).
The cancellation rate was 3.2% (US average 1.8%).
ATL to PHL on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Republic Airways | 90.5% | 112 min | 2.5% | 119 |
| PSA Airlines | 80.8% | 98 min | 4.9% | 859 |
| American Airlines | 79.6% | 123 min | 2.5% | 635 |
| Spirit Airlines | 78.9% | 59 min | 1.4% | 72 |
| Delta Air Lines | 76.3% | 54 min | 3.0% | 3,016 |
| Frontier Airlines | 62.1% | 87 min | 3.0% | 1,048 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly ATL to PHL
On-time arrival % by scheduled departure hour (local time), 11,532 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 80.8% | 3.3% | 183 |
| 6am–7am | 92.9% | 3.4% | 381 |
| 7am–8am | 86.1% | 2.5% | 1,213 |
| 8am–9am | 85.7% | 1.8% | 449 |
| 9am–10am | 79.9% | 3.4% | 655 |
| 10am–11am | 81.8% | 1.8% | 771 |
| 11am–12pm | 82.7% | 1.8% | 722 |
| 12pm–1pm | 81.0% | 1.6% | 674 |
| 1pm–2pm | 79.8% | 1.1% | 568 |
| 2pm–3pm | 72.2% | 1.6% | 607 |
| 3pm–4pm | 61.2% | 2.8% | 1,259 |
| 4pm–5pm | 59.0% | 2.9% | 613 |
| 5pm–6pm | 63.5% | 1.8% | 277 |
| 6pm–7pm | 62.2% | 2.7% | 1,101 |
| 7pm–8pm | 59.1% | 3.4% | 239 |
| 8pm–9pm | 67.4% | 1.4% | 625 |
| 9pm–10pm | 53.4% | 0.0% | 118 |
| 10pm–11pm | 65.4% | 3.6% | 975 |
| 11pm–12am | 61.6% | 2.9% | 102 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on ATL to PHL
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 74.6% | -1.9 pts | 0.4% | 234 |
| Christmas & New Year (Dec 20 - Jan 3) | 62.0% | -14.5 pts | 1.4% | 437 |
| Summer peak (Jun 15 - Aug 15) | 62.2% | -14.2 pts | 4.5% | 2,178 |
| All other days | 76.4% | — | 2.0% | 8,683 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).