Best Time to Fly BWI to PIT: On-Time Stats by Hour & Airline
Baltimore/Washington International Thurgood Marshall → Pittsburgh International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 79.1% of Baltimore (BWI) to Pittsburgh (PIT) flights arrived on time (1,075 scheduled flights). That is 1.5 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 (91% on time) and Sunday the weakest day of the week (69%).
2.0% of flights were cancelled, versus 1.8% nationally.
BWI 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 |
|---|---|---|---|---|
| Southwest Airlines | 79.1% | 54 min | 2.0% | 1,075 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BWI to PIT
On-time arrival % by scheduled departure hour (local time), 2,120 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 9am–10am | Limited data | 1 | |
| 10am–11am | 89.9% | 0.7% | 437 |
| 11am–12pm | 89.0% | 1.4% | 287 |
| 1pm–2pm | Limited data | 7 | |
| 2pm–3pm | Limited data | 1 | |
| 3pm–4pm | 79.0% | 3.1% | 128 |
| 4pm–5pm | 78.0% | 1.7% | 240 |
| 5pm–6pm | 72.9% | 0.5% | 189 |
| 6pm–7pm | 67.7% | 3.1% | 96 |
| 7pm–8pm | Limited data | 16 | |
| 8pm–9pm | 85.9% | 2.2% | 181 |
| 9pm–10pm | 73.9% | 2.2% | 231 |
| 10pm–11pm | 54.9% | 2.9% | 306 |
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 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) | 74.4% | -7.5 pts | 0.0% | 39 |
| Christmas & New Year (Dec 20 - Jan 3) | 62.0% | -19.8 pts | 2.5% | 81 |
| Summer peak (Jun 15 - Aug 15) | 63.0% | -18.9 pts | 3.8% | 368 |
| All other days | 81.9% | — | 1.3% | 1,632 |
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).