PlainFlights

Route · SJU → STT · 2020–2025 BTS data

San Juan to Charlotte Amalie

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SJU to STT (San Juan to Charlotte Amalie) ranks #3405 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

77.9%
On-time
-1.1 pts
vs US avg
81 min
Delay when late
2,766
Flights
#3405 of 4927
Corpus placement

Cancelled

1.1%

Best Month

Apr 2024 81%

Worst Month

Dec 2023 64%

Distance

68 mi

Carriers

5

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 31 10 0 0 B6
Nov 2025 31 6 0 0 B6
Aug 2025 37 14 1 0 F9,B6
Jul 2025 39 12 0 0 B6,F9
Jun 2025 30 8 0 0 B6
May 2025 31 2 0 0 B6
Apr 2025 30 4 0 0 B6
Mar 2025 31 2 0 0 B6
Jan 2025 31 11 0 0 B6
Dec 2024 31 7 0 0 B6
Oct 2024 57 14 0 0 B6
Sep 2024 49 9 1 0 B6
Aug 2024 62 12 1 1 B6
Jul 2024 62 12 0 0 B6
Jun 2024 65 23 0 0 B6,F9
May 2024 49 4 2 1 B6,F9
Apr 2024 73 14 2 1 B6,F9
Mar 2024 67 16 3 0 B6,F9
Feb 2024 48 11 2 0 B6,F9
Jan 2024 47 8 0 0 B6,F9
Dec 2023 61 22 0 0 F9,B6
Nov 2023 41 9 0 0 B6,F9
Oct 2023 40 13 0 0 B6,F9
Sep 2023 39 17 0 0 B6,F9

SJU–STT seasonal on-time pattern

Best: May (85.3%) · weakest: December (70.5%)

65%70%75%80%85%90% JanFebMarAprMayJunJulAugSepOctNovDec 70.5%

Strongest calendar month

May

85.3% on-time · ~43 flights/mo

Busiest calendar month

August

~53 flights/mo avg

Weakest calendar month

December

70.5% on-time · ~42 flights/mo

Cancellation Rate

1.1%

12 of 1,082 flights

Diversion Rate

0.3%

3 of 1,082 flights

Explore origin & destination

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

SJU - San Juan

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

SJU on-time profile

STT - Charlotte Amalie

Full on-time, delay-cause, and seasonal performance for Charlotte Amalie, VI.

STT on-time profile

Compare the two airports

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

Compare SJU vs STT

Origin-hub reliability standing

Mid-pack among SJU departures

From SJU, this corridor sits with 14 other 75–85% on-time routes out of 21 tracked departures, not the hub's reliability leaders (1 at ≥85%) and not the softest ( 6 below 75%). Destination: Charlotte Amalie · fleet on-time rank #3878 of 4927.

What the Data Says About SJU to STT

The San Juan to Charlotte Amalie corridor (SJU to STT) posts a 77.9% on-time rate on the lower edge of the average band, based on 2,766 tracked flights. Late flights run 81.3 minutes behind on average. 5 carriers cover the 68-mile route; over the last 24 months, 12 of 1,082 flights were cancelled (1.1%) and 0.3% diverted.

The monthly split is wide on this route: Apr 2024 posted the strongest performance at 81% on-time, while Dec 2023 came in at just 64% - a 17-point swing worth factoring into travel timing.

On the multi-year calendar, SJU–STT peaks in May at 85.3% on-time while August carries the heaviest traffic (~53 flights per month) ; the softest month is December at 70.5%, a 14.8-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does SJU to STT rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, SJU to STT ranks #3405 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 SJU to STT? ▼
Flights from San Juan to Charlotte Amalie have a 77.9% on-time rate based on 2,766 flights. The average delay is 81.3 minutes. The best recent month was Apr 2024 with 81% on-time.
What is the cancellation rate for SJU to STT? ▼
Over the last 24 months, 1.1% of flights on this route were cancelled (12 of 1,082 flights) and 0.3% were diverted.
How far is the flight from SJU to STT? ▼
The flight distance from San Juan (SJU) to Charlotte Amalie (STT) is approximately 68 miles. This route is served by 5 carriers.
When is the best time to fly from SJU to STT? ▼
The best recent month for on-time performance was Apr 2024 (81% on-time). The worst was Dec 2023 (64% on-time). Consider booking during months with historically better performance.

Airports on this route

SJU Airport

San Juan
STT Airport

Charlotte Amalie
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 SJU–STT data

SJU–STT is mid-pack at 77.9% on-time; month and carrier mix move more than the corridor headline.

  • Compare SJU and STT airport profiles: delay causes and top routes differ even on the same corridor. SJU airport
  • If your dates flex, May (85.3% on-time) beats December (70.5%) on this corridor. Seasonal chart
  • 4 other routes post a similar 77.9% 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.