Best Time to Fly BOI to ORD: On-Time Stats by Hour & Airline
Boise Air Terminal → Chicago O'Hare International
Data through July 2026 · Last updated October 18, 2026
1,111 flights were scheduled from Boise (BOI) to Chicago (ORD) in the last 12 months, and 75.3% of those that flew arrived on time, 2.3 points below the US average of 77.6%.
SkyWest Airlines was the most punctual of the 4 airlines on the route at 83.3%, while American Airlines trailed at 62.4%.
February has been the best month (88% on time) and Friday the weakest day of the week (73%).
1.2% of flights were cancelled, versus 1.8% nationally.
BOI 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 |
|---|---|---|---|---|
| SkyWest Airlines | 83.3% | 75 min | 2.2% | 507 |
| United Airlines | 77.4% | 88 min | 0.8% | 244 |
| Envoy Air | 63.7% | 108 min | 0.0% | 157 |
| American Airlines | 62.4% | 90 min | 0.0% | 203 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BOI to ORD
On-time arrival % by scheduled departure hour (local time), 1,882 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | Limited data | 1 | |
| 7am–8am | 75.7% | 9.8% | 41 |
| 8am–9am | 87.7% | 0.7% | 691 |
| 10am–11am | Limited data | 2 | |
| 11am–12pm | Limited data | 1 | |
| 12pm–1pm | 81.2% | 0.6% | 727 |
| 1pm–2pm | 63.1% | 0.0% | 308 |
| 3pm–4pm | 67.6% | 0.0% | 111 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on BOI 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 | 32 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 75.0% | -6.6 pts | 0.0% | 88 |
| Summer peak (Jun 15 - Aug 15) | 74.0% | -7.6 pts | 0.6% | 358 |
| All other days | 81.6% | — | 0.6% | 1,404 |
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).