STX to SJU flight delays & on-time performance
Nonstop flights from Henry E. Rohlsen Airport to Luis Munoz Marin International Airport · 94 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at STX or SJU right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Christiansted (STX) to San Juan (SJU) arrived on time 75% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 0.9% were cancelled, and 5% arrived an hour or more late.
- Departures scheduled around 2pm did best (84% on time); around 5pm did worst (44%).
- Monday was the most reliable day to fly (86% on time) and Sunday the least (69%).
- The largest source of delay minutes was late-arriving aircraft (66%).
Which airline is most on time from STX 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 | 76% | 1.0% | 12 min | 4.5% | 312 |
| Frontier Airlines | 20% | 0.0% | 56 min | 60.0% | 5 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 2pm84%77 flights
- 3pm75%112 flights
- 4pm75%112 flights
- 5pm44%16 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday86%2.2% cancelled
- Tuesday71%0.0% cancelled
- Wednesday80%0.0% cancelled
- Thursday78%0.0% cancelled
- Friday76%0.0% cancelled
- Saturday69%4.5% cancelled
- Sunday69%0.0% 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 aircraft66%
- Airline (crew, maintenance, cleaning, fueling)24%
- Air traffic control & airport congestion9%
- Security1%
- Extreme weather0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather67%
- Air traffic control & airport congestion33%
- Airline (crew, maintenance, cleaning, fueling)0%
- Security0%
STX to SJU: common questions
- How often are STX to SJU flights on time?
- 75% 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 Christiansted to San Juan cancelled?
- 0.9% of scheduled flights were cancelled (3 of 317).
- How long are typical delays?
- Across all flights the average arrival delay was 13 min (early arrivals count as zero). Flights that were late arrived 48 min behind schedule on average, and 5.4% of flights were an hour or more late.
- How long is taxi time at STX?
- Flights on this route spent 12 min taxiing from the gate to takeoff on average.
Related routes
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: STX → SJU, nonstop flights by US airlines that report to the DOT. How we calculate this.