Chicago (ORD) to Sun Valley/Hailey/Ketchum (SUN): On-Time Performance
Data through May 2026
Chicago (ORD) to Sun Valley/Hailey/Ketchum (SUN) is a thinner route than most in this dataset — 260 departures over the past year, roughly 5 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 63% arrived on time, noticeably below the national average of 78%.
- On-time
- 63%
- arrived <15 min late
- Avg delay
- 28 min
- completed flights
- Cancelled
- 1.0%
- Flights/day
- 0.71
- last 12 months
- Duration
- 4h 6m
- scheduled
- Distance
- 1,341 mi
Monthly on-time trend
Best time to fly from ORD to SUN
Aim for departures around 8 a.m. (69% on-time); avoid 9 a.m. departures (55%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 62% | 31 min |
| Tuesdaybest | 73% | 21 min |
| Wednesday | 72% | 23 min |
| Thursday | 60% | 24 min |
| Friday | 51% | 42 min |
| Saturday | 65% | 21 min |
| Sunday | 61% | 29 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft19%
- Airline operations39%
- National airspace system20%
- Weather22%
Frequently asked questions
- How often are flights from ORD to SUN delayed?
- 37% of ORD–SUN 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 28 minutes.
- What is the best time of day to fly from ORD to SUN?
- Departures around 8 a.m. have the best record (69% on-time), while departures around 9 a.m. have the worst (55%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from ORD to SUN?
- The scheduled ORD–SUN flight time averages 4h 6m over 1,341 miles. Actual arrival times vary — flights on this route land 15+ minutes late 37% of the time.
- How often are ORD to SUN flights cancelled?
- 1% 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 SUN?
- Tuesday flights have the best record at 73% on-time. Day-of-week differences on this route are meaningful — Friday trails at 51%.
Explore related pages
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Based on 389 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.