Best Time to Fly RDU to MIA: On-Time Stats by Hour & Airline
Raleigh-Durham International → Miami International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 77.0% of Raleigh/Durham (RDU) to Miami (MIA) flights arrived on time (2,359 scheduled flights). That is 0.6 points below the national average of 77.6%.
Delta Air Lines was the most punctual of the 4 airlines on the route at 82.2%, while Frontier Airlines trailed at 67.7%.
April has been the best month (84% on time) and Sunday the weakest day of the week (75%).
1.7% of flights were cancelled, versus 1.8% nationally.
RDU to MIA 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 | 82.2% | 92 min | 1.9% | 360 |
| American Airlines | 77.5% | 103 min | 1.5% | 1,676 |
| Envoy Air | 73.1% | 71 min | 1.1% | 94 |
| Frontier Airlines | 67.7% | 80 min | 3.5% | 199 |
| Republic Airways | Limited data | 30 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly RDU to MIA
On-time arrival % by scheduled departure hour (local time), 4,940 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 1am–2am | Limited data | 1 | |
| 5am–6am | 92.6% | 1.2% | 247 |
| 6am–7am | 91.3% | 1.8% | 506 |
| 7am–8am | 90.3% | 1.8% | 326 |
| 8am–9am | 83.3% | 1.3% | 1,132 |
| 9am–10am | 85.9% | 1.5% | 65 |
| 10am–11am | 86.3% | 0.5% | 213 |
| 11am–12pm | 80.4% | 2.1% | 574 |
| 12pm–1pm | 74.2% | 0.6% | 183 |
| 1pm–2pm | 69.4% | 0.0% | 50 |
| 2pm–3pm | 60.0% | 0.0% | 40 |
| 3pm–4pm | 71.8% | 2.7% | 73 |
| 4pm–5pm | 62.0% | 3.4% | 117 |
| 5pm–6pm | 55.9% | 1.6% | 305 |
| 6pm–7pm | 69.9% | 1.5% | 405 |
| 7pm–8pm | 69.5% | 2.0% | 633 |
| 8pm–9pm | Limited data | 23 | |
| 9pm–10pm | Limited data | 16 | |
| 10pm–11pm | Limited data | 25 | |
| 11pm–12am | Limited data | 6 | |
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 MIA
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) | 72.4% | -8.7 pts | 0.0% | 88 |
| Christmas & New Year (Dec 20 - Jan 3) | 78.2% | -2.9 pts | 1.1% | 190 |
| Summer peak (Jun 15 - Aug 15) | 69.3% | -11.8 pts | 2.2% | 881 |
| All other days | 81.1% | — | 1.6% | 3,781 |
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).