Best Time to Fly STX to MIA: On-Time Stats by Hour & Airline
Henry E. Rohlsen → Miami International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 79.9% of Christiansted (STX) to Miami (MIA) flights arrived on time (680 scheduled flights). That is 2.3 points above the national average of 77.6%.
American Airlines was the only reporting airline with regular flights on this route.
February has been the best month (88% on time) and Sunday the weakest day of the week (73%).
0.7% of flights were cancelled, versus 1.8% nationally.
STX 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 | 79.9% | 130 min | 0.7% | 680 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly STX to MIA
On-time arrival % by scheduled departure hour (local time), 1,219 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 8am–9am | 90.7% | 3.6% | 56 |
| 9am–10am | 90.5% | 0.0% | 74 |
| 1pm–2pm | 73.3% | 0.0% | 118 |
| 2pm–3pm | 75.4% | 2.5% | 196 |
| 3pm–4pm | 75.1% | 0.0% | 238 |
| 4pm–5pm | 76.4% | 0.0% | 199 |
| 5pm–6pm | 73.4% | 0.0% | 144 |
| 6pm–7pm | 83.0% | 0.0% | 194 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on STX 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) | Limited data | 27 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 72.7% | -6.3 pts | 1.8% | 56 |
| Summer peak (Jun 15 - Aug 15) | 73.7% | -5.4 pts | 0.4% | 235 |
| All other days | 79.1% | — | 0.6% | 901 |
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).