STT to SJU flight delays & on-time performance
Nonstop flights from Cyril E. King Airport to Luis Munoz Marin International Airport · 68 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at STT or SJU right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Charlotte Amalie (STT) to San Juan (SJU) arrived on time 71% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 2.2% were cancelled, and 13% arrived an hour or more late.
- Departures scheduled around 1pm did best (81% on time); around 4pm did worst (66%).
- Friday was the most reliable day to fly (82% on time) and Monday the least (61%).
- The largest source of delay minutes was late-arriving aircraft (64%).
Which airline is most on time from STT to SJU?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| JetBlue | 72% | 2.2% | 22 min | 12.3% | 542 |
| Frontier Airlines | 50% | 0.0% | 177 min | 33.3% | 6 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 12pm76%18 flights
- 1pm81%73 flights
- 2pm68%173 flights
- 3pm75%169 flights
- 4pm66%103 flights
- 5pm50%12 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday61%2.7% cancelled
- Tuesday80%1.4% cancelled
- Wednesday76%0.0% cancelled
- Thursday68%0.0% cancelled
- Friday82%0.0% cancelled
- Saturday68%5.2% cancelled
- Sunday65%4.2% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft64%
- Airline (crew, maintenance, cleaning, fueling)22%
- Air traffic control & airport congestion13%
- Security0%
- Extreme weather0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather58%
- Air traffic control & airport congestion25%
- Airline (crew, maintenance, cleaning, fueling)17%
- Security0%
STT to SJU: common questions
- How often are STT to SJU flights on time?
- 71% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Charlotte Amalie to San Juan cancelled?
- 2.2% of scheduled flights were cancelled (12 of 548).
- How long are typical delays?
- Across all flights the average arrival delay was 24 min (early arrivals count as zero). Flights that were late arrived 81 min behind schedule on average, and 12.5% of flights were an hour or more late.
- How long is taxi time at STT?
- Flights on this route spent 14 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SJU to STT — 70% on time
More flights from Charlotte Amalie
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: STT → SJU, nonstop flights by US airlines that report to the DOT. How we calculate this.