Raleigh/Durham (RDU) to Miami (MIA): On-Time Performance
Data through July 2026
Raleigh/Durham (RDU) to Miami (MIA) effectively runs on two schedules. In February 2025, 88% of arrivals were on time; in August 2024 that fell to 59% — a 29-point seasonal swing. Across the full period the route averages 78% on-time against a national 78%. Morning departures also hold up better than evening ones (86% vs 65%), which matters most in the rough months.
- On-time
- 78%
- arrived <15 min late
- Avg delay
- 20 min
- completed flights
- Cancelled
- 1.7%
- Flights/day
- 6.5
- last 12 months
- Duration
- 2h 14m
- scheduled
- Distance
- 700 mi
Best airline from RDU to MIA
4 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Linesmost reliable | 85% | 13 min | 1.7% | 755 |
| American Airlines | 78% | 21 min | 1.5% | 3,664 |
| Envoy Air | 78% | 15 min | 1.1% | 262 |
| Frontier Airlines | 68% | 30 min | 3.6% | 393 |
Monthly on-time trend
Best time to fly from RDU to MIA
Aim for departures around 5 a.m. (93% on-time); avoid 5 p.m. departures (56%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 78% | 25 min |
| Tuesdaybest | 82% | 19 min |
| Wednesday | 82% | 18 min |
| Thursday | 80% | 16 min |
| Friday | 75% | 23 min |
| Saturday | 77% | 19 min |
| Sunday | 75% | 23 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft49%
- Airline operations34%
- National airspace system12%
- Weather6%
Frequently asked questions
- How often are flights from RDU to MIA delayed?
- 22% of RDU–MIA flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 20 minutes.
- Which airline is most reliable from RDU to MIA?
- Delta Air Lines has the best on-time record on this route at 85%, based on 755 flights. 4 airlines flew RDU–MIA frequently enough to compare in this period.
- What is the best time of day to fly from RDU to MIA?
- Departures around 5 a.m. have the best record (93% on-time), while departures around 5 p.m. have the worst (56%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from RDU to MIA?
- The scheduled RDU–MIA flight time averages 2h 14m over 700 miles. Actual arrival times vary — flights on this route land 15+ minutes late 22% of the time.
- How often are RDU to MIA flights cancelled?
- 1.7% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, slightly above the national rate of 1.6%.
- What is the worst month to fly from RDU to MIA?
- August 2024 was the roughest month in this dataset, with only 59% of arrivals on time. The best was February 2025 at 88%. If your dates are flexible, that 29-point gap is worth planning around.
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Based on 5,157 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.