Best Time to Fly BUF to BWI: On-Time Stats by Hour & Airline
Buffalo Niagara International → Baltimore/Washington International Thurgood Marshall
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 87.0% of Buffalo (BUF) to Baltimore (BWI) flights arrived on time (1,750 scheduled flights). That is 9.4 points above the national average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
September has been the best month (95% on time) and Monday the weakest day of the week (85%).
1.4% of flights were cancelled, versus 1.8% nationally.
BUF to BWI 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 |
|---|---|---|---|---|
| Southwest Airlines | 87.0% | 53 min | 1.4% | 1,750 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BUF to BWI
On-time arrival % by scheduled departure hour (local time), 3,418 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 94.4% | 0.8% | 362 |
| 6am–7am | 95.1% | 0.3% | 367 |
| 7am–8am | 94.2% | 0.5% | 191 |
| 8am–9am | 91.8% | 1.5% | 273 |
| 9am–10am | 94.8% | 0.5% | 192 |
| 10am–11am | 88.7% | 0.6% | 178 |
| 11am–12pm | 90.0% | 2.2% | 275 |
| 12pm–1pm | 87.8% | 0.7% | 273 |
| 1pm–2pm | 87.8% | 2.3% | 176 |
| 2pm–3pm | 78.7% | 1.6% | 191 |
| 3pm–4pm | 81.0% | 1.4% | 279 |
| 4pm–5pm | 82.4% | 2.0% | 296 |
| 5pm–6pm | 72.4% | 2.4% | 212 |
| 6pm–7pm | 66.1% | 3.5% | 116 |
| 7pm–8pm | Limited data | 27 | |
| 8pm–9pm | Limited data | 10 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on BUF to BWI
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) | 85.2% | -3.4 pts | 0.0% | 61 |
| Christmas & New Year (Dec 20 - Jan 3) | 80.3% | -8.4 pts | 4.3% | 138 |
| Summer peak (Jun 15 - Aug 15) | 81.1% | -7.6 pts | 2.0% | 596 |
| All other days | 88.7% | — | 1.1% | 2,623 |
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).