Best Time to Fly ORD to EYW: On-Time Stats by Hour & Airline
Chicago O'Hare International → Key West International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 80.7% of Chicago (ORD) to Key West (EYW) flights arrived on time (775 scheduled flights). That is 3.0 points above the national average of 77.6%.
Envoy Air was the most punctual of the 3 airlines on the route at 82.0%, while United Airlines trailed at 77.2%.
February has been the best month (86% on time) and Sunday the weakest day of the week (77%).
1.4% of flights were cancelled, versus 1.8% nationally.
ORD to EYW 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 | 82.0% | 62 min | 1.4% | 434 |
| Republic Airways | 80.2% | 54 min | 2.0% | 203 |
| United Airlines | 77.2% | 75 min | 0.7% | 138 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly ORD to EYW
On-time arrival % by scheduled departure hour (local time), 1,217 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | 86.7% | 0.0% | 45 |
| 8am–9am | 80.7% | 1.2% | 412 |
| 9am–10am | Limited data | 4 | |
| 10am–11am | 80.8% | 0.7% | 439 |
| 11am–12pm | 70.5% | 1.5% | 133 |
| 12pm–1pm | Limited data | 13 | |
| 1pm–2pm | 81.4% | 0.9% | 114 |
| 4pm–5pm | Limited data | 24 | |
| 5pm–6pm | 80.7% | 3.0% | 33 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on ORD to EYW
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) | 70.0% | -10.0 pts | 9.1% | 33 |
| Christmas & New Year (Dec 20 - Jan 3) | 79.4% | -0.6 pts | 1.0% | 98 |
| Summer peak (Jun 15 - Aug 15) | 83.8% | +3.9 pts | 2.0% | 101 |
| All other days | 80.0% | — | 0.8% | 985 |
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).