Historical on-time performance
Chicago to Salt Lake City
Flights on ORD–SLC arrive on time 68% of the time over the last 12 months.
based on 3,080 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Too close to call — no single carrier is clearly more on-time here.
- United AirlinesOn-time70%Medianon timep9055 minCancel0.7%Flights1,068
- Delta Air LinesOn-time70%Medianon timep9065 minCancel0.7%Flights1,011
- American AirlinesOn-time64%Medianon timep9070 minCancel1.8%Flights935
- SkyWest AirlinesOn-time38%Median35 minp90130 minCancel1.5%Flights66
Why flights run late
Delay causes
- Airline37%
- Weather10%
- Air traffic (NAS)14%
- Late aircraft39%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline33%
- Weather55%
- Air traffic (NAS)12%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 33 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly ORD → SLC
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 81% on time.
- Mornings81% on time · p90 30 min · 2,731 flights
- Middays77% on time · p90 45 min · 2,720 flights
- Afternoons72% on time · p90 60 min · 801 flights
- Evenings68% on time · p90 70 min · 2,206 flights
- Overnights57% on time · p90 85 min · 584 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 71% to 79% on time.
- Tuesdays79% on time · p90 40 min · 1,257 flights
- Wednesdays76% on time · p90 50 min · 1,267 flights
- Saturdays76% on time · p90 45 min · 1,182 flights
- Thursdays75% on time · p90 50 min · 1,315 flights
- Mondays73% on time · p90 60 min · 1,355 flights
- Sundays71% on time · p90 65 min · 1,312 flights
- Fridays71% on time · p90 55 min · 1,354 flights
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