Historical on-time performance
Washington to San Juan
1,554 miData through May 2026Source: US DOT · BTS
Flights on DCA–SJU arrive on time 76% of the time over the last 12 months.
On-time rate76%arrived within 15 min
p90 delay45 min1 in 10 flights is worse (tail risk)
Cancelled1.2%of scheduled flights
based on 337 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- JetBlue AirwaysOn-time76%Medianon timep9045 minCancel1.2%Flights337
Why flights run late
Delay causes
- Airline38%
- Weather13%
- Air traffic (NAS)42%
- Late aircraft7%
- Security0%
Most delay minutes here are attributed to Air traffic (NAS).
When flights don't go
Why flights were cancelled
- Airline25%
- Weather50%
- Air traffic (NAS)25%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 4 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 → SJU
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best day of week
On-time rates are fairly even by day on this route — ranging from 71% to 80% on time.
- Tuesdays80% on time · p90 50 min · 156 flights · limited
- Wednesdays78% on time · p90 60 min · 156 flights · limited
- Saturdays76% on time · p90 50 min · 157 flights · limited
- Sundays76% on time · p90 45 min · 157 flights · limited
- Mondays74% on time · p90 50 min · 156 flights · limited
- Fridays73% on time · p90 60 min · 157 flights · limited
- Thursdays71% on time · p90 55 min · 157 flights · limited
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