STT to SJU flight delays
Charlotte Amalie, VI (STT) San Juan, PR (SJU) · 68 miles
547 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
71.08%
Arrived on time
Within 15 minutes of schedule
2.01%
Cancelled
Share of scheduled flights
81 min
When late, late by
Average across delayed arrivals
24 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The season swings this route hard. In May it ran 36.3 points more punctual than in January — a difference bigger than the one between the best and worst airlines on most routes. If the date is flexible, it is worth more than the carrier.
This route does worse than its own airport. STT as a whole runs 7 points more punctual than these flights, which points at something specific to the route — the time of day it is scheduled, or the aircraft that feed it — rather than the airport.
Only JetBlue Airways flies this route in the published record, so there is no choice to weigh — the route's figures and the airline's are the same figures.
This is a thin route — 547 flights across the whole period. On a route this infrequent a cancellation is far more costly than the rate suggests, because the next departure may not be the same day.
Which airline should you fly on this route?
Over January 2025 – August 2026, JetBlue Airways arrived on time most often on STT to SJU. Flights ran closest to schedule in May and worst in January.
Every airline on STT to SJU
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| JetBlue Airways | 533 | 72.03% | 2.06% | 74 min | D |
| Frontier Airlines | 14 | 35.71% | 0% | 201 min | — |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
Other routes from Charlotte Amalie
Common questions
Are flights from Charlotte Amalie to San Juan usually delayed?
71.08% of flights on the STT to SJU route arrived within 15 minutes of schedule, so roughly 3 in every ten arrived late. That is worse than the average route in this record.
Which airlines fly from Charlotte Amalie to San Juan?
Only JetBlue Airways appears in the published record on this route, with 533 flights and 72.03% arriving on time.
How often are STT to SJU flights cancelled?
2.01% of scheduled flights did not operate — about 20 in every thousand. That is in the normal range.
What is the best month to fly Charlotte Amalie to San Juan?
May, when 94.4% of flights arrived on time. The worst was January at 58.1%.
When STT to SJU flights are late, how late are they?
About 81 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on STT to SJU during January 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →