Best Time to Fly ATL to PIT: On-Time Stats by Hour & Airline
Hartsfield-Jackson Atlanta International → Pittsburgh International
Data through July 2026 · Last updated October 18, 2026
2,754 flights were scheduled from Atlanta (ATL) to Pittsburgh (PIT) in the last 12 months, and 83.8% of those that flew arrived on time, 6.1 points above the US average of 77.6%.
Among 2 airlines, Delta Air Lines led with 84.1% on time and Southwest Airlines was last with 80.8%.
Over 24 months, Wednesday was the most reliable day (90% on time) and July the worst month (77%).
The cancellation rate was 2.0% (US average 1.8%).
ATL to PIT 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 | 84.1% | 56 min | 2.2% | 2,461 |
| Southwest Airlines | 80.8% | 56 min | 0.3% | 293 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly ATL to PIT
On-time arrival % by scheduled departure hour (local time), 5,577 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | 93.7% | 2.8% | 325 |
| 8am–9am | 89.7% | 0.9% | 432 |
| 9am–10am | 93.8% | 1.1% | 356 |
| 10am–11am | 89.3% | 1.3% | 379 |
| 11am–12pm | 89.5% | 1.6% | 494 |
| 12pm–1pm | 93.8% | 0.0% | 64 |
| 1pm–2pm | 88.2% | 0.9% | 421 |
| 2pm–3pm | 83.2% | 1.1% | 478 |
| 3pm–4pm | 79.8% | 1.2% | 597 |
| 4pm–5pm | 77.1% | 1.1% | 190 |
| 5pm–6pm | 75.8% | 1.2% | 430 |
| 6pm–7pm | 80.0% | 0.8% | 126 |
| 7pm–8pm | 77.0% | 3.2% | 253 |
| 8pm–9pm | 68.8% | 1.9% | 266 |
| 9pm–10pm | 78.5% | 0.6% | 160 |
| 10pm–11pm | 79.3% | 1.7% | 525 |
| 11pm–12am | 72.5% | 1.2% | 81 |
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 PIT
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) | 78.6% | -6.4 pts | 0.0% | 103 |
| Christmas & New Year (Dec 20 - Jan 3) | 80.4% | -4.7 pts | 2.3% | 219 |
| Summer peak (Jun 15 - Aug 15) | 78.6% | -6.4 pts | 2.0% | 976 |
| All other days | 85.0% | — | 1.2% | 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).