Route · STT → SJU · 2020–2025 BTS data
Charlotte Amalie to San Juan
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), STT to SJU (Charlotte Amalie to San Juan) ranks #3146 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 74.3%
- On-time
- -4.7 pts
- vs US avg
- 88 min
- Delay when late
- 3,424
- Flights
- #3146 of 4927
- Corpus placement
Cancelled
1.4%
Best Month
Apr 2025 84%
Worst Month
Feb 2024 64%
Distance
68 mi
Carriers
6
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 51 | 17 | 0 | 0 | B6 |
| Nov 2025 | 41 | 14 | 0 | 0 | B6 |
| Aug 2025 | 42 | 12 | 2 | 0 | F9,B6 |
| Jul 2025 | 43 | 16 | 0 | 0 | B6,F9 |
| Jun 2025 | 34 | 6 | 0 | 0 | B6 |
| May 2025 | 36 | 7 | 0 | 0 | B6 |
| Apr 2025 | 51 | 8 | 0 | 0 | B6 |
| Mar 2025 | 49 | 8 | 0 | 0 | B6 |
| Feb 2025 | 42 | 12 | 1 | 0 | B6 |
| Jan 2025 | 49 | 16 | 0 | 0 | B6 |
| Dec 2024 | 54 | 17 | 0 | 1 | B6 |
| Nov 2024 | 42 | 10 | 0 | 0 | B6 |
| Oct 2024 | 63 | 14 | 0 | 1 | B6 |
| Sep 2024 | 49 | 11 | 1 | 0 | B6 |
| Aug 2024 | 71 | 21 | 1 | 0 | B6 |
| Jul 2024 | 72 | 19 | 0 | 0 | B6,UA |
| Jun 2024 | 75 | 24 | 0 | 0 | B6,F9,UA |
| May 2024 | 58 | 16 | 2 | 0 | B6,F9 |
| Apr 2024 | 81 | 21 | 2 | 0 | B6,F9 |
| Mar 2024 | 76 | 17 | 5 | 0 | B6,F9 |
| Feb 2024 | 56 | 20 | 3 | 0 | B6,F9 |
| Jan 2024 | 58 | 11 | 1 | 0 | B6,F9 |
| Dec 2023 | 78 | 25 | 0 | 1 | F9,B6 |
| Nov 2023 | 45 | 13 | 0 | 0 | B6,F9 |
STT–SJU seasonal on-time pattern
Best: March (79.7%) · weakest: July (70.4%)
Strongest calendar month
March
79.7% on-time · ~65 flights/mo
Busiest calendar month
March
~65 flights/mo avg
Weakest calendar month
July
70.4% on-time · ~59 flights/mo
Cancellation Rate
1.4%
18 of 1,316 flights
Diversion Rate
0.2%
3 of 1,316 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
STT - Charlotte Amalie
Full on-time, delay-cause, and seasonal performance for Charlotte Amalie, VI.
STT on-time profileSJU - San Juan
Full on-time, delay-cause, and seasonal performance for San Juan, PR.
SJU on-time profileCompare the two airports
See STT and SJU side by side on delays, cancellations, and reliability.
Compare STT vs SJUOrigin-hub reliability standing
Softer reliability from STT
Among 9 routes leaving STT, only 2 (including this one) clear below 75% on-time, while 1 stay ≥85% and 6 sit mid-band. Travelers comparing STT options should weigh this 74.3% print against those peers · fleet on-time rank #4573 of 4927.
Similar routes
Other BTS-tracked routes with comparable performance or trip length to STT–SJU.
Routes with a similar on-time rate
What the Data Says About STT to SJU
On-time performance on the STT to SJU pairing (Charlotte Amalie to San Juan) trails a chunk of the network: 74.3% of 3,424 tracked flights arrived on schedule, with a 88.1-minute average delay on the ones that ran late. The route spans about 68 miles across 6 carriers. Cancellations over the trailing 24 months hit 1.4% (18 of 1,316 flights), with 0.2% diverted.
The monthly split is wide on this route: Apr 2025 posted the strongest performance at 84% on-time, while Feb 2024 came in at just 64% - a 20-point swing worth factoring into travel timing.
On the multi-year calendar, STT–SJU peaks in March at 79.7% on-time ; the softest month is July at 70.4%, a 9.3-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does STT to SJU rank among US routes by traffic? ▼
How often are flights delayed from STT to SJU? ▼
What is the cancellation rate for STT to SJU? ▼
How far is the flight from STT to SJU? ▼
When is the best time to fly from STT to SJU? ▼
Airports on this route
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 STT–SJU data
STT–SJU sits 4.7 pts below the national 79% average; check the seasonal chart and airport profiles before treating the headline as typical.
- Compare STT and SJU airport profiles: delay causes and top routes differ even on the same corridor. STT airport
- If your dates flex, March (79.7% on-time) beats July (70.4%) on this corridor. Seasonal chart
- 4 other routes post a similar 74.3% 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.
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.