Historical on-time performance
Los Angeles to Washington
Flights on LAX–IAD arrive on time 85% of the time over the last 12 months.
based on 2,386 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Not enough comparable data to name a most-on-time carrier — low-data carriers aren't ranked.
- United AirlinesOn-time85%Medianon timep9020 minCancel0.7%Flights2,294
- Alaska AirlinesOn-time79%Medianon timep9030 minCancel0.0%Flights61
- American AirlinesOn-time68%Medianon timep9060 minCancel0.0%Flights31
Why flights run late
Delay causes
- Airline35%
- Weather0%
- Air traffic (NAS)22%
- Late aircraft43%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline47%
- Weather53%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 15 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 → IAD
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Afternoons are the most reliable time of day to fly this route — 91% on time.
- Afternoons91% on time · p90 10 min · 632 flights
- Overnights86% on time · p90 20 min · 2,638 flights
- Middays85% on time · p90 20 min · 2,357 flights
- Mornings80% on time · p90 30 min · 1,835 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 82% to 87% on time.
- Tuesdays87% on time · p90 15 min · 1,025 flights
- Mondays86% on time · p90 20 min · 1,106 flights
- Thursdays85% on time · p90 20 min · 1,115 flights
- Wednesdays84% on time · p90 25 min · 1,053 flights
- Fridays83% on time · p90 25 min · 1,109 flights
- Sundays83% on time · p90 25 min · 1,119 flights
- Saturdays82% on time · p90 30 min · 996 flights
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