Best Time to Fly STT to ORD: On-Time Stats by Hour & Airline
Cyril E King → Chicago O'Hare International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 70.7% of Charlotte Amalie (STT) to Chicago (ORD) flights arrived on time (255 scheduled flights). That is 7.0 points below the national average of 77.6%.
United Airlines was the most punctual of the 2 airlines on the route at 71.1%, while American Airlines trailed at 69.9%.
February has been the best month (79% on time) and Monday the weakest day of the week (66%).
1.2% of flights were cancelled, versus 1.8% nationally.
STT to ORD 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 |
|---|---|---|---|---|
| United Airlines | 71.1% | 86 min | 1.3% | 155 |
| American Airlines | 69.9% | 129 min | 1.0% | 100 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly STT to ORD
On-time arrival % by scheduled departure hour (local time), 381 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 12pm–1pm | Limited data | 1 | |
| 1pm–2pm | Limited data | 29 | |
| 2pm–3pm | 70.8% | 0.0% | 147 |
| 3pm–4pm | 72.0% | 1.6% | 188 |
| 4pm–5pm | Limited data | 16 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on STT to ORD
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 | 5 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 75.6% | +6.0 pts | 4.3% | 47 |
| Summer peak (Jun 15 - Aug 15) | Limited data | 16 | ||
| All other days | 69.5% | — | 0.3% | 313 |
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).