Best Time to Fly EYW to ORD: On-Time Stats by Hour & Airline
Key West International → Chicago O'Hare International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 68.5% of Key West (EYW) to Chicago (ORD) flights arrived on time (775 scheduled flights). That is 9.1 points below the national average of 77.6%.
Republic Airways was the most punctual of the 3 airlines on the route at 80.4%, while United Airlines trailed at 54.5%.
May has been the best month (79% on time) and Friday the weakest day of the week (66%).
1.6% of flights were cancelled, versus 1.8% nationally.
EYW 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 |
|---|---|---|---|---|
| Republic Airways | 80.4% | 87 min | 2.0% | 203 |
| Envoy Air | 67.6% | 90 min | 1.4% | 434 |
| United Airlines | 54.5% | 105 min | 1.4% | 138 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly EYW to ORD
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 | 83.9% | 0.0% | 33 |
| 9am–10am | Limited data | 1 | |
| 10am–11am | Limited data | 24 | |
| 12pm–1pm | 66.9% | 1.3% | 149 |
| 1pm–2pm | 72.7% | 1.0% | 304 |
| 2pm–3pm | Limited data | 8 | |
| 3pm–4pm | 66.2% | 1.3% | 149 |
| 4pm–5pm | 67.2% | 2.3% | 434 |
| 5pm–6pm | Limited data | 1 | |
| 6pm–7pm | 64.9% | 0.9% | 114 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on EYW 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) | 56.7% | -11.9 pts | 9.1% | 33 |
| Christmas & New Year (Dec 20 - Jan 3) | 74.0% | +5.4 pts | 1.0% | 98 |
| Summer peak (Jun 15 - Aug 15) | 76.3% | +7.7 pts | 2.0% | 101 |
| All other days | 68.6% | — | 1.2% | 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).