Historical on-time performance
Chicago to Los Angeles
Flights on ORD–LAX arrive on time 73% of the time over the last 12 months.
based on 6,773 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-time77%Medianon timep9045 minCancel0.6%Flights3,396
- Spirit AirlinesOn-time75%Medianon timep9065 minCancel2.5%Flights276
- American AirlinesOn-time68%Medianon timep9065 minCancel2.2%Flights3,040
- Frontier AirlinesOn-time62%Median5 minp9095 minCancel3.3%Flights61
Why flights run late
Delay causes
- Airline34%
- Weather8%
- Air traffic (NAS)16%
- Late aircraft42%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline30%
- Weather58%
- Air traffic (NAS)11%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 96 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 → LAX
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 — 83% on time.
- Mornings83% on time · p90 25 min · 5,998 flights
- Middays81% on time · p90 35 min · 4,034 flights
- Afternoons76% on time · p90 50 min · 3,476 flights
- Evenings67% on time · p90 70 min · 3,763 flights
- Overnights64% on time · p90 65 min · 3,072 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 73% to 79% on time.
- Wednesdays79% on time · p90 45 min · 2,825 flights
- Tuesdays78% on time · p90 40 min · 2,771 flights
- Thursdays76% on time · p90 45 min · 3,015 flights
- Saturdays76% on time · p90 45 min · 2,703 flights
- Mondays76% on time · p90 55 min · 2,989 flights
- Fridays74% on time · p90 50 min · 3,032 flights
- Sundays73% on time · p90 50 min · 3,010 flights
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