Historical on-time performance
Washington to San Juan
1,554 miData through Dec 2025Source: US DOT · BTS
Flights on DCA–SJU arrive on time 78% of the time over the last 12 months.
On-time rate78%arrived within 15 min
p90 delay45 min1 in 10 flights is worse (tail risk)
Cancelled0.9%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-time78%Medianon timep9045 minCancel0.9%Flights337
Why flights run late
Delay causes
- Airline40%
- Weather9%
- Air traffic (NAS)30%
- Late aircraft20%
- Security0%
Most delay minutes here are attributed to Airline.
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 (2023-01 .. 2025-12).
Best day of week
On-time rates are fairly even by day on this route — ranging from 71% to 83% on time.
- Tuesdays83% on time · p90 30 min · 157 flights · limited
- Wednesdays79% on time · p90 60 min · 157 flights · limited
- Saturdays78% on time · p90 50 min · 156 flights · limited
- Mondays75% on time · p90 50 min · 157 flights · limited
- Sundays75% on time · p90 55 min · 157 flights · limited
- Fridays74% on time · p90 45 min · 156 flights · limited
- Thursdays71% on time · p90 65 min · 156 flights · limited
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