Best Time to Fly PHL to ATL: On-Time Stats by Hour & Airline
Philadelphia International → Hartsfield-Jackson Atlanta International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 78.9% of Philadelphia (PHL) to Atlanta (ATL) flights arrived on time (5,750 scheduled flights). That is 1.2 points above the national average of 77.6%.
Republic Airways was the most punctual of the 6 airlines on the route at 87.9%, while Frontier Airlines trailed at 66.4%.
September has been the best month (85% on time) and Sunday the weakest day of the week (72%).
3.0% of flights were cancelled, versus 1.8% nationally.
PHL to ATL 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 | 87.9% | 99 min | 2.5% | 119 |
| Delta Air Lines | 84.3% | 69 min | 3.0% | 3,017 |
| PSA Airlines | 81.8% | 68 min | 4.1% | 859 |
| American Airlines | 69.4% | 66 min | 2.2% | 638 |
| Spirit Airlines | 67.7% | 50 min | 4.2% | 71 |
| Frontier Airlines | 66.4% | 70 min | 2.6% | 1,046 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly PHL to ATL
On-time arrival % by scheduled departure hour (local time), 11,533 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 86.6% | 2.8% | 1,094 |
| 6am–7am | 87.2% | 2.2% | 622 |
| 7am–8am | 80.7% | 1.7% | 631 |
| 8am–9am | 84.5% | 2.2% | 1,242 |
| 9am–10am | 82.5% | 1.6% | 255 |
| 10am–11am | 86.5% | 2.1% | 992 |
| 11am–12pm | 79.9% | 1.7% | 292 |
| 12pm–1pm | 77.2% | 2.1% | 705 |
| 1pm–2pm | 75.4% | 1.4% | 696 |
| 2pm–3pm | 83.4% | 0.9% | 431 |
| 3pm–4pm | 73.2% | 1.9% | 975 |
| 4pm–5pm | 72.4% | 0.6% | 642 |
| 5pm–6pm | 71.2% | 2.6% | 567 |
| 6pm–7pm | 63.6% | 2.8% | 931 |
| 7pm–8pm | 67.0% | 3.2% | 1,096 |
| 8pm–9pm | 64.0% | 0.9% | 112 |
| 9pm–10pm | 71.0% | 7.9% | 202 |
| 10pm–11pm | 61.4% | 8.3% | 48 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on PHL to ATL
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) | 72.5% | -7.7 pts | 0.4% | 235 |
| Christmas & New Year (Dec 20 - Jan 3) | 72.7% | -7.5 pts | 1.4% | 438 |
| Summer peak (Jun 15 - Aug 15) | 67.7% | -12.5 pts | 4.1% | 2,182 |
| All other days | 80.2% | — | 1.9% | 8,678 |
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).