Historical on-time performance
San Juan to Houston
2,007 miData through Dec 2025Source: US DOT · BTS
Flights on SJU–IAH arrive on time 86% of the time over the last 12 months.
On-time rate86%arrived within 15 min
p90 delay20 min1 in 10 flights is worse (tail risk)
Cancelled0.7%of scheduled flights
based on 873 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesOn-time86%Medianon timep9020 minCancel0.7%Flights873
Why flights run late
Delay causes
- Airline20%
- Weather0%
- Air traffic (NAS)25%
- Late aircraft55%
- Security0%
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 → IAH
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Early mornings are the most reliable time of day to fly this route — 98% on time.
- Early mornings98% on time · p90 on time · 89 flights · limited
- Mornings91% on time · p90 10 min · 996 flights
- Middays87% on time · p90 20 min · 179 flights · limited
- Afternoons71% on time · p90 50 min · 1,381 flights
- Overnights66% on time · p90 85 min · 107 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 77% to 82% on time.
- Sundays82% on time · p90 30 min · 450 flights
- Mondays81% on time · p90 25 min · 429 flights
- Tuesdays80% on time · p90 30 min · 345 flights
- Fridays80% on time · p90 25 min · 362 flights
- Thursdays79% on time · p90 35 min · 356 flights
- Wednesdays79% on time · p90 35 min · 356 flights
- Saturdays77% on time · p90 45 min · 461 flights
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