Historical on-time performance
Los Angeles to Chicago
Flights on LAX–ORD arrive on time 76% of the time over the last 12 months.
based on 6,742 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.
- Spirit AirlinesOn-time80%Medianon timep9030 minCancel3.2%Flights279
- United AirlinesOn-time80%Medianon timep9030 minCancel0.7%Flights3,394
- American AirlinesOn-time71%Medianon timep9065 minCancel2.3%Flights3,039
- Frontier AirlinesOn-time70%Medianon timep9095 minCancel3.3%Flights30
Why flights run late
Delay causes
- Airline30%
- Weather0%
- Air traffic (NAS)25%
- Late aircraft44%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline33%
- Weather55%
- Air traffic (NAS)13%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 104 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 LAX → ORD
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 — 88% on time.
- Mornings88% on time · p90 15 min · 6,488 flights
- Overnights80% on time · p90 35 min · 3,923 flights
- Early mornings79% on time · p90 35 min · 982 flights
- Evenings79% on time · p90 45 min · 2,145 flights
- Afternoons73% on time · p90 60 min · 2,038 flights
- Middays72% on time · p90 55 min · 4,760 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 77% to 83% on time.
- Tuesdays83% on time · p90 30 min · 2,799 flights
- Wednesdays81% on time · p90 30 min · 2,799 flights
- Thursdays80% on time · p90 35 min · 2,999 flights
- Mondays80% on time · p90 35 min · 3,009 flights
- Saturdays79% on time · p90 40 min · 2,727 flights
- Fridays79% on time · p90 40 min · 3,038 flights
- Sundays77% on time · p90 45 min · 2,965 flights
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