Historical on-time performance
Boston to Washington
Flights on BOS–IAD arrive on time 81% of the time over the last 12 months.
based on 1,487 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesOn-time81%Medianon timep9035 minCancel1.9%Flights1,487
Why flights run late
Delay causes
- Airline17%
- Weather3%
- Air traffic (NAS)31%
- Late aircraft49%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather82%
- Air traffic (NAS)18%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 28 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 BOS → 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 70% to 93% on time.
- Middays93% on time · p90 5 min · 122 flights · limited
- Mornings93% on time · p90 5 min · 2,175 flights
- Afternoons72% on time · p90 50 min · 1,094 flights
- Evenings70% on time · p90 70 min · 1,084 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 80% to 85% on time.
- Saturdays85% on time · p90 25 min · 641 flights
- Wednesdays84% on time · p90 30 min · 633 flights
- Tuesdays84% on time · p90 25 min · 632 flights
- Mondays82% on time · p90 30 min · 641 flights
- Sundays81% on time · p90 40 min · 642 flights
- Thursdays80% on time · p90 35 min · 641 flights
- Fridays80% on time · p90 40 min · 645 flights
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