Boise (BOI) to Chicago (ORD): On-Time Performance
Data through July 2026
Boise (BOI) to Chicago (ORD) effectively runs on two schedules. In January 2025, 98% of arrivals were on time; in April 2026 that fell to 66% — a 33-point seasonal swing. Across the full period the route averages 79% on-time against a national 78%.
- On-time
- 79%
- arrived <15 min late
- Avg delay
- 18 min
- completed flights
- Cancelled
- 0.7%
- Flights/day
- 3.0
- last 12 months
- Duration
- 3h 41m
- scheduled
- Distance
- 1,437 mi
Best airline from BOI to ORD
4 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlinesmost reliable | 86% | 11 min | 0.9% | 1,164 |
| United Airlines | 76% | 21 min | 0.6% | 363 |
| Envoy Air | 66% | 33 min | 0.0% | 214 |
| American Airlines | 62% | 35 min | 0.0% | 203 |
Monthly on-time trend
Best time to fly from BOI to ORD
Aim for departures around 8 a.m. (87% on-time); avoid 1 p.m. departures (63%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 80% | 17 min |
| Tuesday | 84% | 19 min |
| Wednesday | 75% | 22 min |
| Thursday | 80% | 11 min |
| Friday | 72% | 23 min |
| Saturdaybest | 85% | 19 min |
| Sunday | 78% | 15 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft30%
- Airline operations30%
- National airspace system27%
- Weather13%
Frequently asked questions
- How often are flights from BOI to ORD delayed?
- 21% of BOI–ORD flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 18 minutes.
- Which airline is most reliable from BOI to ORD?
- SkyWest Airlines has the best on-time record on this route at 86%, based on 1,164 flights. 4 airlines flew BOI–ORD frequently enough to compare in this period.
- What is the best time of day to fly from BOI to ORD?
- Departures around 8 a.m. have the best record (87% on-time), while departures around 1 p.m. have the worst (63%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from BOI to ORD?
- The scheduled BOI–ORD flight time averages 3h 41m over 1,437 miles. Actual arrival times vary — flights on this route land 15+ minutes late 21% of the time.
- How often are BOI to ORD flights cancelled?
- 0.7% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from BOI to ORD?
- April 2026 was the roughest month in this dataset, with only 66% of arrivals on time. The best was January 2025 at 98%. If your dates are flexible, that 33-point gap is worth planning around.
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Based on 1,944 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.