Best Time to Fly RDU to BWI: On-Time Stats by Hour & Airline
Raleigh-Durham International → Baltimore/Washington International Thurgood Marshall
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 86.0% of Raleigh/Durham (RDU) to Baltimore (BWI) flights arrived on time (1,791 scheduled flights). That is 8.3 points above the national average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
November has been the best month (94% on time) and Sunday the weakest day of the week (79%).
2.2% of flights were cancelled, versus 1.8% nationally.
RDU 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 | 85.9% | 55 min | 2.2% | 1,788 |
| Spirit Airlines | Limited data | 3 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly RDU to BWI
On-time arrival % by scheduled departure hour (local time), 3,611 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 97.1% | 0.6% | 171 |
| 6am–7am | 97.0% | 1.8% | 508 |
| 7am–8am | 85.2% | 0.0% | 54 |
| 8am–9am | 91.7% | 4.0% | 200 |
| 9am–10am | 91.8% | 0.0% | 135 |
| 10am–11am | 92.2% | 0.4% | 272 |
| 11am–12pm | 93.4% | 0.0% | 228 |
| 12pm–1pm | 89.6% | 1.5% | 264 |
| 1pm–2pm | 88.6% | 0.0% | 246 |
| 2pm–3pm | 91.1% | 0.8% | 125 |
| 3pm–4pm | 85.6% | 0.4% | 231 |
| 4pm–5pm | 76.4% | 2.2% | 273 |
| 5pm–6pm | 65.5% | 7.0% | 129 |
| 6pm–7pm | 75.6% | 2.9% | 346 |
| 7pm–8pm | 67.1% | 1.2% | 170 |
| 8pm–9pm | 64.7% | 3.5% | 259 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on RDU 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) | 92.0% | +4.4 pts | 0.0% | 75 |
| Christmas & New Year (Dec 20 - Jan 3) | 84.2% | -3.4 pts | 1.9% | 161 |
| Summer peak (Jun 15 - Aug 15) | 75.5% | -12.1 pts | 3.0% | 658 |
| All other days | 87.6% | — | 1.4% | 2,717 |
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).