Chicago (ORD) to Billings (BIL): On-Time Performance
Data through May 2026
Envoy Air effectively owns the ORD–BIL corridor, operating 72% of its flights and landing on time 81% of the time. The route overall runs 80% on-time, about level with the national average.
- On-time
- 80%
- arrived <15 min late
- Avg delay
- 12 min
- completed flights
- Cancelled
- 0.4%
- Flights/day
- 1.2
- last 12 months
- Duration
- 3h 12m
- scheduled
- Distance
- 1,060 mi
Best airline from ORD to BIL
2 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Envoy Airmost reliable | 81% | 13 min | 0.5% | 407 |
| SkyWest Airlines | 78% | 10 min | 0.0% | 157 |
Monthly on-time trend
Best time to fly from ORD to BIL
Aim for departures around 8 a.m. (88% on-time); avoid 8 p.m. departures (76%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 81% | 11 min |
| Tuesdaybest | 91% | 7 min |
| Wednesday | 77% | 11 min |
| Thursday | 77% | 19 min |
| Friday | 78% | 13 min |
| Saturday | 77% | 11 min |
| Sunday | 82% | 11 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft41%
- Airline operations38%
- National airspace system13%
- Weather8%
Frequently asked questions
- How often are flights from ORD to BIL delayed?
- 20% of ORD–BIL flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 12 minutes.
- Which airline is most reliable from ORD to BIL?
- Envoy Air has the best on-time record on this route at 81%, based on 407 flights. 2 airlines flew ORD–BIL frequently enough to compare in this period.
- What is the best time of day to fly from ORD to BIL?
- Departures around 8 a.m. have the best record (88% on-time), while departures around 8 p.m. have the worst (76%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from ORD to BIL?
- The scheduled ORD–BIL flight time averages 3h 12m over 1,060 miles. Actual arrival times vary — flights on this route land 15+ minutes late 20% of the time.
- How often are ORD to BIL flights cancelled?
- 0.4% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What day of the week is most reliable for ORD to BIL?
- Tuesday flights have the best record at 91% on-time. Day-of-week differences on this route are meaningful — Thursday trails at 77%.
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Based on 564 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.