Historical on-time performance
San Diego to Washington
Flights on SAN–IAD arrive on time 86% of the time over the last 12 months.
based on 1,345 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-time87%Medianon timep9015 minCancel0.5%Flights1,040
- Alaska AirlinesOn-time83%Medianon timep9025 minCancel1.0%Flights305
Why flights run late
Delay causes
- Airline38%
- Weather13%
- Air traffic (NAS)28%
- Late aircraft21%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline38%
- Weather50%
- Air traffic (NAS)13%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 8 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 SAN → IAD
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 82% to 87% on time.
- Overnights87% on time · p90 15 min · 1,052 flights
- Middays84% on time · p90 25 min · 1,258 flights
- Mornings82% on time · p90 25 min · 2,308 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 80% to 87% on time.
- Tuesdays87% on time · p90 20 min · 657 flights
- Wednesdays86% on time · p90 20 min · 665 flights
- Mondays85% on time · p90 20 min · 660 flights
- Saturdays83% on time · p90 25 min · 635 flights
- Thursdays83% on time · p90 20 min · 667 flights
- Fridays82% on time · p90 25 min · 672 flights
- Sundays80% on time · p90 35 min · 664 flights
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