Best Time to Fly MIA to RDU: On-Time Stats by Hour & Airline
Miami International → Raleigh-Durham International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 70.7% of Miami (MIA) to Raleigh/Durham (RDU) flights arrived on time (2,356 scheduled flights). That is 6.9 points below the national average of 77.6%.
Among 4 airlines, Envoy Air led with 79.0% on time and Delta Air Lines was last with 64.9%.
Over 24 months, Tuesday was the most reliable day (79% on time) and August the worst month (56%).
The cancellation rate was 1.7% (US average 1.8%).
MIA to RDU 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 |
|---|---|---|---|---|
| Envoy Air | 79.0% | 58 min | 1.0% | 96 |
| Frontier Airlines | 75.4% | 63 min | 2.0% | 199 |
| American Airlines | 71.0% | 73 min | 1.4% | 1,671 |
| Delta Air Lines | 64.9% | 91 min | 2.5% | 360 |
| Republic Airways | Limited data | 30 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly MIA to RDU
On-time arrival % by scheduled departure hour (local time), 4,938 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | Limited data | 27 | |
| 6am–7am | Limited data | 19 | |
| 7am–8am | 94.3% | 1.4% | 213 |
| 8am–9am | 88.5% | 1.6% | 493 |
| 9am–10am | 85.2% | 0.8% | 238 |
| 10am–11am | 86.4% | 0.0% | 59 |
| 11am–12pm | Limited data | 26 | |
| 12pm–1pm | 73.5% | 1.2% | 84 |
| 1pm–2pm | 66.7% | 3.7% | 82 |
| 2pm–3pm | 67.8% | 2.1% | 424 |
| 3pm–4pm | 70.9% | 0.9% | 327 |
| 4pm–5pm | 62.8% | 1.9% | 427 |
| 5pm–6pm | 72.4% | 1.2% | 419 |
| 6pm–7pm | 69.5% | 1.6% | 735 |
| 7pm–8pm | 69.9% | 1.5% | 527 |
| 8pm–9pm | 63.1% | 0.9% | 112 |
| 9pm–10pm | 64.4% | 1.3% | 629 |
| 10pm–11pm | 74.5% | 3.1% | 97 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on MIA to RDU
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) | 72.7% | -3.2 pts | 0.0% | 88 |
| Christmas & New Year (Dec 20 - Jan 3) | 66.7% | -9.2 pts | 0.5% | 190 |
| Summer peak (Jun 15 - Aug 15) | 59.5% | -16.4 pts | 2.2% | 881 |
| All other days | 75.9% | — | 1.5% | 3,779 |
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).