Best Time to Fly BIL to ORD: On-Time Stats by Hour & Airline
Billings Logan International → Chicago O'Hare International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 80.7% of Billings (BIL) to Chicago (ORD) flights arrived on time (317 scheduled flights). That is 3.1 points above the national average of 77.6%.
Among 2 airlines, SkyWest Airlines led with 82.1% on time and Envoy Air was last with 80.2%.
Over 24 months, Tuesday was the most reliable day (87% on time) and July the worst month (71%).
The cancellation rate was 0.3% (US average 1.8%).
BIL 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 | 82.1% | 69 min | 0.0% | 86 |
| Envoy Air | 80.2% | 116 min | 0.4% | 231 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BIL to ORD
On-time arrival % by scheduled departure hour (local time), 568 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 93.8% | 3.0% | 33 |
| 6am–7am | 86.7% | 0.0% | 90 |
| 11am–12pm | 90.3% | 0.0% | 31 |
| 12pm–1pm | 74.9% | 0.0% | 413 |
| 1pm–2pm | Limited data | 1 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on BIL to ORD
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Summer peak (Jun 15 - Aug 15) | 74.7% | -7.2 pts | 0.0% | 248 |
| All other days | 81.9% | — | 0.3% | 320 |
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).