Best Time to Fly PIT to ATL: On-Time Stats by Hour & Airline
Pittsburgh International → Hartsfield-Jackson Atlanta International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 89.9% of Pittsburgh (PIT) to Atlanta (ATL) flights arrived on time (2,754 scheduled flights). That is 12.3 points above the national average of 77.6%.
Delta Air Lines was the most punctual of the 2 airlines on the route at 90.1%, while Southwest Airlines trailed at 87.9%.
November has been the best month (94% on time) and Sunday the weakest day of the week (85%).
2.2% of flights were cancelled, versus 1.8% nationally.
PIT 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 |
|---|---|---|---|---|
| Delta Air Lines | 90.1% | 76 min | 2.4% | 2,461 |
| Southwest Airlines | 87.9% | 37 min | 0.3% | 293 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly PIT to ATL
On-time arrival % by scheduled departure hour (local time), 5,577 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 93.8% | 1.6% | 247 |
| 6am–7am | 90.0% | 1.3% | 670 |
| 7am–8am | 90.8% | 2.4% | 618 |
| 8am–9am | 95.4% | 1.0% | 196 |
| 9am–10am | 92.3% | 0.0% | 39 |
| 10am–11am | 90.9% | 2.5% | 473 |
| 11am–12pm | 95.2% | 0.9% | 563 |
| 12pm–1pm | 87.3% | 1.4% | 290 |
| 1pm–2pm | 90.5% | 1.3% | 687 |
| 2pm–3pm | 94.5% | 0.0% | 92 |
| 3pm–4pm | Limited data | 22 | |
| 4pm–5pm | 85.0% | 1.0% | 606 |
| 5pm–6pm | 77.7% | 1.0% | 300 |
| 6pm–7pm | 83.2% | 1.7% | 407 |
| 7pm–8pm | 83.8% | 1.5% | 333 |
| 8pm–9pm | 66.7% | 6.2% | 32 |
| 10pm–11pm | Limited data | 2 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on PIT 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) | 86.3% | -3.0 pts | 0.0% | 103 |
| Christmas & New Year (Dec 20 - Jan 3) | 83.2% | -6.1 pts | 2.3% | 219 |
| Summer peak (Jun 15 - Aug 15) | 88.1% | -1.2 pts | 2.2% | 976 |
| All other days | 89.3% | — | 1.3% | 4,279 |
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).