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Route · PHL → SJU · 2020–2025 BTS data

Philadelphia to San Juan

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), PHL to SJU (Philadelphia to San Juan) ranks #1249 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

72.4%
On-time
-6.6 pts
vs US avg
78 min
Delay when late
9,434
Flights
#1249 of 4927
Corpus placement

Cancelled

1.6%

Best Month

Sep 2024 93%

Worst Month

Jun 2024 45%

Distance

1,576 mi

Carriers

12

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 163 72 4 1 F9,NK,AA
Nov 2025 126 35 2 0 F9,NK,AA
Oct 2025 95 36 0 0 AA,F9,NK
Sep 2025 64 25 0 1 NK,F9,AA
Aug 2025 126 58 3 1 AA,F9,NK
Jul 2025 132 71 6 0 AA,NK,F9
Jun 2025 132 49 2 0 AA,NK,F9
May 2025 165 61 0 0 AA,NK,F9
Apr 2025 166 54 0 2 F9,NK,AA
Mar 2025 157 44 2 0 AA,F9,NK
Feb 2025 148 43 2 0 AA,F9,NK
Jan 2025 164 44 5 0 AA,F9,NK
Dec 2024 164 54 1 1 AA,F9,NK
Nov 2024 103 18 2 0 NK,F9,AA
Oct 2024 65 12 0 0 NK,F9
Sep 2024 57 4 0 0 AA,F9,NK
Aug 2024 128 48 7 1 AA,F9,NK
Jul 2024 137 74 2 0 AA,F9,NK
Jun 2024 135 74 2 1 AA,F9,NK
May 2024 129 52 4 2 AA,F9,NK
Apr 2024 114 35 0 0 AA,F9,NK
Mar 2024 124 47 2 0 AA,F9,NK
Feb 2024 126 43 0 1 AA,F9,NK
Jan 2024 161 62 4 0 AA,F9,NK

PHL–SJU seasonal on-time pattern

Best: November (81.5%) · weakest: July (60.5%)

55%60%65%70%75%80%85% JanFebMarAprMayJunJulAugSepOctNovDec 70.7%

Strongest calendar month

November

81.5% on-time · ~121 flights/mo

Busiest calendar month

May

~160 flights/mo avg

Weakest calendar month

July

60.5% on-time · ~141 flights/mo

Cancellation Rate

1.6%

50 of 3,081 flights

Diversion Rate

0.4%

11 of 3,081 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

PHL - Philadelphia

Full on-time, delay-cause, and seasonal performance for Philadelphia, PA.

PHL on-time profile

SJU - San Juan

Full on-time, delay-cause, and seasonal performance for San Juan, PR.

SJU on-time profile

Compare the two airports

See PHL and SJU side by side on delays, cancellations, and reliability.

Compare PHL vs SJU

Origin-hub reliability standing

Softer reliability from PHL

Among 65 routes leaving PHL, only 1 (including this one) clear below 75% on-time, while 4 stay ≥85% and 60 sit mid-band. Travelers comparing PHL options should weigh this 72.4% print against those peers · fleet on-time rank #4736 of 4927.

What the Data Says About PHL to SJU

On-time performance on the PHL to SJU pairing (Philadelphia to San Juan) trails a chunk of the network: 72.4% of 9,434 tracked flights arrived on schedule, with a 77.7-minute average delay on the ones that ran late. The route spans about 1,576 miles across 12 carriers. Cancellations over the trailing 24 months hit 1.6% (50 of 3,081 flights), with 0.4% diverted.

The monthly split is wide on this route: Sep 2024 posted the strongest performance at 93% on-time, while Jun 2024 came in at just 45% - a 48-point swing worth factoring into travel timing.

On the multi-year calendar, PHL–SJU peaks in November at 81.5% on-time while May carries the heaviest traffic (~160 flights per month) ; the softest month is July at 60.5%, a 21.0-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does PHL to SJU rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, PHL to SJU ranks #1249 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from PHL to SJU? ▼
Flights from Philadelphia to San Juan have a 72.4% on-time rate based on 9,434 flights. The average delay is 77.7 minutes. The best recent month was Sep 2024 with 93% on-time.
What is the cancellation rate for PHL to SJU? ▼
Over the last 24 months, 1.6% of flights on this route were cancelled (50 of 3,081 flights) and 0.4% were diverted.
How far is the flight from PHL to SJU? ▼
The flight distance from Philadelphia (PHL) to San Juan (SJU) is approximately 1,576 miles. This route is served by 12 carriers.
When is the best time to fly from PHL to SJU? ▼
The best recent month for on-time performance was Sep 2024 (93% on-time). The worst was Jun 2024 (45% on-time). Consider booking during months with historically better performance.

Airports on this route

PHL Airport

Philadelphia
SJU Airport

San Juan
Data source

Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.

Read our methodology - how this data is sourced, computed, and verified.

Using PHL–SJU data

PHL–SJU sits 6.6 pts below the national 79% average; check the seasonal chart and airport profiles before treating the headline as typical.

  • Compare PHL and SJU airport profiles: delay causes and top routes differ even on the same corridor. PHL airport
  • If your dates flex, November (81.5% on-time) beats July (60.5%) on this corridor. Seasonal chart
  • 4 other routes post a similar 72.4% on-time rate; compare before you commit to this pairing. Similar routes

On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.