According to PlainFlights' airport traffic ranking (BTS On-Time Performance total flights), San Juan, PR (SJU) ranks #50 of 382 tracked US airports by total flights (most flights = #1). San Juan, PR posts bottom-quartile on-time performance among the 382 tracked U.S. airports, as a high-volume U.S. airport.
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SJU on-time rate vs. the national average
Behind the U.S. average across all 382 tracked airports.
Volume vs. on-time rate
Where San Juan, PR sits on volume vs. on-time rate
Among the 382 U.S. airports in the BTS corpus, San Juan, PR handles more flight
volume than 87% of them, and has a higher on-time rate than
4% of them, placing it in the quadrant for busy and delay-prone.
Flight volume and on-time rate are independent figures: a busy airport can still run
reliably, and a quiet one can still run late.
San Juan, PR vs. a 29-airport national peer sample, volume percentile vs. on-time-rate percentile.
Total flights (2020-2025): 366,579 ·
On-time rate: 76.1%
Delay Cause Breakdown
Top delay cause: Late Aircraft.
Total delay minutes3,241,967 min
Late Aircraft1,465,560 min · 45%
Carrier1,245,124 min · 38%
NAS (National Aviation System)495,408 min · 15%
Weather29,492 min · 1%
Security6,383 min · 0%
Source: U.S. DOT Bureau of Transportation Statistics, On-Time Performance
SJU - seasonal on-time pattern
Best: October (91%) · worst: July (85.8%)
SJU - on-time rate by year
2020–2025, year-over-year trend.
SJU - taxi-out and taxi-in (monthly)
Average taxi-out 15.7 min · taxi-in 6.1 min over the last 24 reported months (U.S. airport mean taxi-out ≈ 16.4 min).
SJU's average taxi-out (15.7 min) sits near the recent U.S. airport mean (~16.4 min). Month-to-month, it swings from 14.2 min (June 2025) to 18.1 min (January 2025).
Two PlainFlights-derived comparison paths for San Juan, PR, both outside Puerto Rico so the neighborhoods are not same-state geography. Axes stay disjoint: volume peers exclude the on-time peer set. Same-state compare stays below.
The standout signal at San Juan, PR is on-time standing: 76.1% (2.9 pts below the 79% national flight-weighted average; roughly the bottom-quartile on-time performance) across 366,579 BTS flights (2020–2025). When a departure runs late, the average delay is 78.5 minutes; cancellations run 0.85%.
Delay minutes concentrate in Late Aircraft (45.2% late-aircraft, 38.4% carrier, 15.3% NAS, 0.9% weather, 0.2% security). As a busy airport, that mix matters more for connection planning than for a thin schedule.
On the multi-year calendar, SJU is strongest in October (91% on-time) and weakest in July (85.8%), a 5.2-point swing. Volume peaks in July (~5,936 flights/month). The busiest connecting route is to MCO (Orlando) at 74.1% on-time. Field definitions: on-time performance explained.
San Juan, PR vs. the national on-time distribution
On-time rate among all 382 tracked U.S. airports
76.1%Top 96%higher than 4% of 382 airports
San Juan, PR
60%95%
U.S. airports by on-time rate, bucketed by value
Each bar is a band; taller bars hold more airports. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data (2020–2025).
Statistics reflect cumulative performance across all available reporting periods. On-time rates exclude cancelled and diverted flights.
SJU's on-time book sits in the slower half of the BTS set; check the delay mix and the worst month before treating the headline as typical.
Check the busiest route from SJU before you book a connection. See top routes →
Travel in October rather than July if your dates are flexible. Seasonal patterns →
Gate-to-wheels taxi-out averages 15.7 min here; check the monthly series before a tight connection. Taxi times →
On-time rate reflects the BTS historical average across all reporting carriers at this airport, not any single flight or airline.
Frequently Asked Questions
What is San Juan, PR's on-time rate?
San Juan, PR (SJU) has a 76.1% on-time rate across 366,579 BTS-tracked flights (2020-2025), 2.9 pts below the 79% national flight-weighted average; that places it in roughly the bottom-quartile on-time performance.
How does SJU rank among U.S. airports by traffic volume?
San Juan, PR ranks #50 of 382 tracked US airports by total BTS flights (most flights = #1), making it a high-volume U.S. airport.
What's the most common cause of delays at San Juan, PR?
Late Aircraft is the leading delay cause at SJU, accounting for 45.2% of delay minutes. The full breakdown: 45.2% late-aircraft, 38.4% carrier, 15.3% NAS/air-traffic-control, 0.9% weather, and 0.2% security.
When is the best time to fly through San Juan, PR?
October is historically SJU's strongest month at 91% on-time, while July is the weakest at 85.8%, a 5.2-point swing across the BTS historical record.