Historical on-time performance
San Juan to Baltimore
1,565 miData through Dec 2025Source: US DOT · BTS
Flights on SJU–BWI arrive on time 82% of the time over the last 12 months.
On-time rate82%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled0.4%of scheduled flights
based on 1,032 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Too close to call — no single carrier is clearly more on-time here.
- Southwest AirlinesOn-time83%Medianon timep9025 minCancel0.4%Flights825
- Spirit AirlinesOn-time78%Medianon timep9035 minCancel0.5%Flights207
Why flights run late
Delay causes
- Airline27%
- Weather1%
- Air traffic (NAS)30%
- Late aircraft41%
- Security2%
Most delay minutes here are attributed to Late aircraft.
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 (2023-01 .. 2025-12).
Best time of day
Mornings are the most reliable time of day to fly this route — 88% on time.
- Mornings88% on time · p90 15 min · 1,586 flights
- Middays79% on time · p90 30 min · 516 flights
- Early mornings78% on time · p90 35 min · 159 flights · limited
- Afternoons70% on time · p90 55 min · 961 flights
- Overnights69% on time · p90 75 min · 71 flights · limited
- Evenings66% on time · p90 55 min · 762 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 75% to 80% on time.
- Wednesdays80% on time · p90 35 min · 546 flights
- Tuesdays79% on time · p90 30 min · 512 flights
- Fridays78% on time · p90 30 min · 586 flights
- Sundays77% on time · p90 35 min · 617 flights
- Saturdays77% on time · p90 35 min · 667 flights
- Thursdays77% on time · p90 40 min · 536 flights
- Mondays75% on time · p90 35 min · 591 flights
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