Historical on-time performance
Raleigh-durham to San Juan
1,433 miData through May 2026Source: US DOT · BTS
Flights on RDU–SJU arrive on time 75% of the time over the last 12 months.
On-time rate75%arrived within 15 min
p90 delay80 min1 in 10 flights is worse (tail risk)
Cancelled2.2%of scheduled flights
based on 186 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- JetBlue AirwaysOn-time75%Medianon timep9080 minCancel2.2%Flights186
Why flights run late
Delay causes
- Airline18%
- Weather0%
- Air traffic (NAS)18%
- Late aircraft64%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline25%
- Weather50%
- Air traffic (NAS)25%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 4 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 RDU → 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 — 79% on time.
- Mornings79% on time · p90 45 min · 165 flights · limited
- Middays70% on time · p90 80 min · 486 flights
- Afternoons68% on time · p90 65 min · 566 flights
- Evenings63% on time · p90 90 min · 157 flights · limited
- Overnights62% on time · p90 90 min · 222 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 62% to 74% on time.
- Fridays74% on time · p90 65 min · 265 flights
- Tuesdays74% on time · p90 85 min · 185 flights · limited
- Wednesdays71% on time · p90 65 min · 182 flights · limited
- Sundays68% on time · p90 70 min · 233 flights
- Thursdays67% on time · p90 80 min · 227 flights
- Mondays64% on time · p90 80 min · 261 flights
- Saturdays62% on time · p90 85 min · 243 flights
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