Historical on-time performance
Baltimore to San Juan
Flights on BWI–SJU arrive on time 68% of the time over the last 12 months.
based on 917 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Not enough comparable data to name a most-on-time carrier — low-data carriers aren't ranked.
- Southwest AirlinesOn-time69%Medianon timep9050 minCancel0.8%Flights825
- Spirit AirlinesOn-time64%Medianon timep9050 minCancel5.4%Flights92
Why flights run late
Delay causes
- Airline31%
- Weather3%
- Air traffic (NAS)28%
- Late aircraft37%
- Security1%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline8%
- Weather67%
- Air traffic (NAS)25%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 12 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 BWI → SJU
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 — 75% on time.
- Mornings75% on time · p90 35 min · 1,300 flights
- Middays66% on time · p90 65 min · 477 flights
- Afternoons65% on time · p90 70 min · 230 flights
- Evenings62% on time · p90 65 min · 1,145 flights
- Overnights57% on time · p90 100 min · 863 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 61% to 73% on time.
- Wednesdays73% on time · p90 45 min · 535 flights
- Tuesdays72% on time · p90 45 min · 489 flights
- Fridays67% on time · p90 75 min · 593 flights
- Thursdays66% on time · p90 55 min · 540 flights
- Sundays63% on time · p90 60 min · 610 flights
- Saturdays62% on time · p90 60 min · 659 flights
- Mondays61% on time · p90 80 min · 589 flights
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