Historical on-time performance
Houston to Los Angeles
Flights on IAH–LAX arrive on time 83% of the time over the last 12 months.
based on 5,029 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.
- Delta Air LinesOn-time87%Medianon timep9015 minCancel1.2%Flights646
- Spirit AirlinesOn-time85%Medianon timep9025 minCancel1.1%Flights455
- United AirlinesOn-time83%Medianon timep9030 minCancel0.4%Flights3,394
- SkyWest AirlinesOn-time78%Medianon timep9050 minCancel0.5%Flights381
- Frontier AirlinesOn-time65%Medianon timep9060 minCancel1.3%Flights153
Why flights run late
Delay causes
- Airline41%
- Weather9%
- Air traffic (NAS)16%
- Late aircraft34%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline48%
- Weather52%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 31 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 IAH → 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 — 90% on time.
- Mornings90% on time · p90 10 min · 4,721 flights
- Middays81% on time · p90 35 min · 2,397 flights
- Afternoons81% on time · p90 35 min · 3,598 flights
- Overnights75% on time · p90 45 min · 2,399 flights
- Evenings74% on time · p90 50 min · 3,029 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 79% to 84% on time.
- Wednesdays84% on time · p90 25 min · 2,295 flights
- Tuesdays83% on time · p90 25 min · 2,234 flights
- Fridays81% on time · p90 35 min · 2,381 flights
- Mondays81% on time · p90 35 min · 2,360 flights
- Saturdays81% on time · p90 40 min · 2,124 flights
- Thursdays81% on time · p90 35 min · 2,383 flights
- Sundays79% on time · p90 40 min · 2,367 flights
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