Historical on-time performance
San Juan to St. Croix Island
94 miData through May 2026Source: US DOT · BTS
Flights on SJU–STX arrive on time 77% of the time over the last 12 months.
On-time rate77%arrived within 15 min
p90 delay45 min1 in 10 flights is worse (tail risk)
Cancelled0.7%of scheduled flights
based on 276 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- JetBlue AirwaysOn-time77%Medianon timep9045 minCancel0.7%Flights276
Why flights run late
Delay causes
- Airline33%
- Weather1%
- Air traffic (NAS)6%
- Late aircraft60%
- Security1%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather50%
- Air traffic (NAS)50%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 2 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 → STX
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 78% to 79% on time.
- Middays79% on time · p90 30 min · 178 flights · limited
- Afternoons78% on time · p90 55 min · 331 flights
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