Historical on-time performance
San Juan to Baltimore
Flights on SJU–BWI arrive on time 77% of the time over the last 12 months.
based on 919 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-time79%Medianon timep9030 minCancel1.0%Flights826
- Spirit AirlinesOn-time62%Medianon timep9070 minCancel5.4%Flights93
Why flights run late
Delay causes
- Airline31%
- Weather0%
- Air traffic (NAS)22%
- Late aircraft44%
- Security2%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline23%
- Weather46%
- Air traffic (NAS)31%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 13 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 SJU → BWI
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 · 1,592 flights
- Middays79% on time · p90 30 min · 472 flights
- Early mornings78% on time · p90 35 min · 160 flights · limited
- Afternoons68% on time · p90 55 min · 986 flights
- Evenings63% on time · p90 55 min · 688 flights
- Overnights55% on time · p90 120 min · 118 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 73% to 80% on time.
- Wednesdays80% on time · p90 35 min · 533 flights
- Tuesdays77% on time · p90 30 min · 496 flights
- Sundays76% on time · p90 35 min · 606 flights
- Thursdays75% on time · p90 40 min · 539 flights
- Saturdays75% on time · p90 40 min · 666 flights
- Fridays75% on time · p90 35 min · 588 flights
- Mondays73% on time · p90 35 min · 588 flights
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