Best Time to Fly EWR to MIA: On-Time Stats by Hour & Airline
Newark Liberty International → Miami International
Data through July 2026 · Last updated October 18, 2026
3,952 flights were scheduled from Newark (EWR) to Miami (MIA) in the last 12 months, and 77.6% of those that flew arrived on time, in line with the US average of 77.6%.
Among 3 airlines, American Airlines led with 81.5% on time and Spirit Airlines was last with 60.5%.
Over 24 months, Tuesday was the most reliable day (85% on time) and July the worst month (68%).
The cancellation rate was 2.8% (US average 1.8%).
EWR 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 |
|---|---|---|---|---|
| American Airlines | 81.5% | 86 min | 3.0% | 1,427 |
| United Airlines | 77.2% | 70 min | 2.4% | 2,246 |
| Spirit Airlines | 60.5% | 76 min | 4.7% | 278 |
| Envoy Air | Limited data | 1 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly EWR to MIA
On-time arrival % by scheduled departure hour (local time), 8,004 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 94.0% | 2.9% | 735 |
| 6am–7am | 91.8% | 1.8% | 814 |
| 7am–8am | 86.2% | 2.1% | 812 |
| 8am–9am | 83.6% | 1.4% | 359 |
| 9am–10am | 73.7% | 2.9% | 274 |
| 10am–11am | 76.0% | 0.9% | 231 |
| 11am–12pm | 78.1% | 1.4% | 669 |
| 12pm–1pm | 75.2% | 1.1% | 727 |
| 1pm–2pm | 75.1% | 1.3% | 394 |
| 2pm–3pm | 66.4% | 2.5% | 401 |
| 3pm–4pm | 72.3% | 1.4% | 362 |
| 4pm–5pm | 58.4% | 2.6% | 265 |
| 5pm–6pm | 68.6% | 5.5% | 273 |
| 6pm–7pm | 59.1% | 4.6% | 900 |
| 7pm–8pm | 68.6% | 2.1% | 286 |
| 8pm–9pm | 67.8% | 2.5% | 475 |
| 9pm–10pm | Limited data | 23 | |
| 10pm–11pm | Limited data | 4 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on EWR 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) | 75.7% | -2.6 pts | 0.0% | 148 |
| Christmas & New Year (Dec 20 - Jan 3) | 65.5% | -12.7 pts | 2.2% | 409 |
| Summer peak (Jun 15 - Aug 15) | 70.4% | -7.8 pts | 5.5% | 1,153 |
| All other days | 78.2% | — | 1.8% | 6,294 |
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).