Best Time to Fly BWI to ATL: On-Time Stats by Hour & Airline
Baltimore/Washington International Thurgood Marshall → Hartsfield-Jackson Atlanta International
Data through July 2026 · Last updated October 18, 2026
5,407 flights were scheduled from Baltimore (BWI) to Atlanta (ATL) in the last 12 months, and 80.6% of those that flew arrived on time, 3.0 points above the US average of 77.6%.
Delta Air Lines was the most punctual of the 4 airlines on the route at 86.5%, while Frontier Airlines trailed at 67.8%.
October has been the best month (88% on time) and Sunday the weakest day of the week (74%).
2.0% of flights were cancelled, versus 1.8% nationally.
BWI 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 | 86.5% | 84 min | 2.1% | 2,811 |
| Spirit Airlines | 85.7% | 61 min | 0.9% | 106 |
| Southwest Airlines | 77.4% | 54 min | 1.3% | 1,566 |
| Frontier Airlines | 67.8% | 66 min | 2.9% | 924 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BWI to ATL
On-time arrival % by scheduled departure hour (local time), 11,332 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 85.4% | 1.5% | 390 |
| 6am–7am | 86.6% | 2.1% | 1,302 |
| 7am–8am | 86.8% | 1.9% | 867 |
| 8am–9am | 88.3% | 1.7% | 1,205 |
| 9am–10am | 87.5% | 2.1% | 376 |
| 10am–11am | 89.5% | 1.8% | 895 |
| 11am–12pm | 81.4% | 1.5% | 542 |
| 12pm–1pm | 83.2% | 0.5% | 627 |
| 1pm–2pm | 79.8% | 1.1% | 636 |
| 2pm–3pm | 80.7% | 1.3% | 467 |
| 3pm–4pm | 72.3% | 0.7% | 280 |
| 4pm–5pm | 78.0% | 1.3% | 938 |
| 5pm–6pm | 63.5% | 3.8% | 583 |
| 6pm–7pm | 67.1% | 1.0% | 1,011 |
| 7pm–8pm | 64.4% | 2.6% | 759 |
| 8pm–9pm | 58.4% | 3.8% | 185 |
| 9pm–10pm | 57.4% | 3.3% | 182 |
| 10pm–11pm | 66.7% | 2.3% | 87 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on BWI 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) | 78.2% | -4.4 pts | 0.4% | 244 |
| Christmas & New Year (Dec 20 - Jan 3) | 76.2% | -6.4 pts | 1.9% | 462 |
| Summer peak (Jun 15 - Aug 15) | 67.0% | -15.6 pts | 3.1% | 2,031 |
| All other days | 82.5% | — | 1.4% | 8,595 |
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).