Historical on-time performance
Washington to Boston
399 miData through May 2026Source: US DOT · BTS
Flights on DCA–BOS arrive on time 68% of the time over the last 12 months.
On-time rate68%arrived within 15 min
p90 delay75 min1 in 10 flights is worse (tail risk)
Cancelled3.9%of scheduled flights
based on 8,895 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Republic AirwaysbestOn-time74%Medianon timep9055 minCancel4.5%Flights4,010
- American AirlinesOn-time63%Medianon timep9085 minCancel3.1%Flights2,240
- JetBlue AirwaysOn-time63%Medianon timep9085 minCancel3.6%Flights2,645
Why flights run late
Delay causes
- Airline19%
- Weather3%
- Air traffic (NAS)32%
- Late aircraft46%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline17%
- Weather46%
- Air traffic (NAS)37%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 345 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 DCA → BOS
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 — 87% on time.
- Mornings87% on time · p90 15 min · 7,093 flights
- Middays79% on time · p90 45 min · 7,360 flights
- Overnights67% on time · p90 70 min · 2,924 flights
- Afternoons65% on time · p90 85 min · 4,692 flights
- Evenings63% on time · p90 100 min · 5,764 flights
Best day of week
Saturdays are the most reliable day to fly this route — 83% on time.
- Saturdays83% on time · p90 35 min · 2,440 flights
- Tuesdays78% on time · p90 50 min · 4,232 flights
- Wednesdays78% on time · p90 50 min · 4,226 flights
- Thursdays73% on time · p90 70 min · 4,295 flights
- Mondays72% on time · p90 65 min · 4,335 flights
- Sundays70% on time · p90 70 min · 4,023 flights
- Fridays69% on time · p90 80 min · 4,282 flights
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