76% of flights leaving Christiansted (STX) arrived on time over the past 12 months, right at the national average of 76%. About 4 flights leave STX on a typical day; 1.6% were cancelled. 74% pushed back from the gate on time, so most of the lateness is already there when the flight leaves the gate.
At a glance
- Best hour to fly: 3 p.m. (72% on time). Worst: 4 p.m. (70%).
- Best month: September (82%). Worst: August (70%).
- Biggest delay cause: late-arriving aircraft (47% of delay minutes).
- Year on year: improving (72% → 75%).
How late?
The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for flights leaving STX: when a flight was late, it was under 45 minutes late 54% of the time. About 1 in 13 flights landed an hour or more late, and 1 in 52 three hours or more; 1.6% were cancelled outright.
- On time or early76%
- 15–30 min late6.5%
- 30–60 min late7.9%
- 1–2 hours late4.6%
- 2–3 hours late1.0%
- 3+ hours late1.9%
- Diverted0.4%
- Cancelled1.6%
Share of all 1,354 scheduled flights, past 12 months, by arrival time against schedule.
Best time of day to fly out of STX
STX is unusually consistent through the day. Flights scheduled to leave at 3 p.m. arrived on time 72% of the time; at 4 p.m. it was 70%, a 2-point gap. Early planes usually start the day at the airport, so they haven't had a chance to pick up delays elsewhere. By evening a late inbound aircraft, a crew running out of duty hours or an afternoon thunderstorm can push one late flight into the next.
Hour × month
Combine the two and the spread is wider still. The most reliable combination at STX was a 2 p.m. departure in April (83% on time); the least, 3 p.m. in January (63%). If you can only move one thing, move the hour. Departure hour usually shifts the odds more than the month does.
Each cell: on-time rate for that departure hour in that calendar month, 2023–2026. Find your travel month, then look along the row for the greenest hour.
Best and worst months
August is the hardest month at STX, with 70% of flights on time across 2023–2026; September is the best at 82%. Summer (June–August) runs 7 points worse than autumn: heavy schedules, peak loads and afternoon thunderstorms. Winter costs 5 points against autumn. Cancellations peak in January (2.2% of flights).
Airlines at STX
American Airlines runs 61% of departures from STX, so STX is effectively its hub. When American Airlines has a bad day, so does the airport.
| Airline | Departures | On time | Left on time | Cancelled | Typical arrival |
|---|---|---|---|---|---|
| American Airlines | 824 | 80% | 79% | 1.2% | −15 min |
| JetBlue | 308 | 74% | 72% | 1.0% | −4 min |
| Delta Air Lines | 126 | 70% | 67% | 2.4% | −3 min |
Why flights are late at STX
Airlines report a cause for every flight that arrives 15 or more minutes late. At STX, 47% of delay minutes came from late-arriving aircraft: the plane showed up late from its previous flight, so the delay started somewhere else. Next is the airlines themselves at 35%. That's why the first flight of the morning is the safest bet: it has no earlier flight to inherit a delay from.
The average taxi from gate to takeoff is 14 minutes, shorter than at most large U.S. airports.
STX vs nearby airports
| Airport | Distance | Departures | On time | Cancelled |
|---|---|---|---|---|
| STX Henry E. Rohlsen | — | 1,354 | 76% | 1.6% |
| STT Cyril E. King | 45 mi | 5,479 | 76% | 1.7% |
Month by month
Over the latest 12 months 75% of STX departures were on time, against 72% in the 12 months before, an improvement of 4 points. The best recent month was May 2026 (84%); the worst, January 2026 (68%).
Last flights of the day
The last flight of the day is a different bet. Across routes from STX, each airline's final departure was cancelled 0.3% of the time, against 1.6% for its earlier flights, so at STX the last flight is actually the steadier one. 2.2% of last flights landed 3+ hours late. The riskiest last flight out was American Airlines to Miami (0.3% cancelled).
| Last flight to | Airline | Leaves | Cancelled | 3h+ late | On time |
|---|---|---|---|---|---|
| MIA Miami | American Airlines | 3:50 p.m. | 0.3% | 2.2% | 79% |
Each airline's last scheduled departure of the day on a route, on days it flies the route at least twice; past 12 months. Riskiest first.
Tips for flying out of STX
- Book the earliest departure you can live with. At STX the 3 p.m. flights do best.
- Traveling in August? Leave extra slack for anything that can't move: cruises, weddings, the last connection of the day.
- Delayed already? Most delays at STX come from late-arriving aircraft. If your inbound plane is late, your flight will be too, whatever the board says.
Routes from STX
Least reliable first. Routes with at least 365 flights a year.
| To | Flights | On time | Cancelled | Typical arrival |
|---|---|---|---|---|
| MIA Miami | 687 | 82% | 0.9% | −15 min |
Flights into STX
Arriving rather than leaving? These are the routes into Henry E. Rohlsen, least reliable first. The weakest is from Miami (77% on time).
| From | Flights | On time | Cancelled |
|---|---|---|---|
| MIA Miami | 688 | 77% | 0.4% |
Questions about STX delays
What is the best time to fly out of STX?
Flights scheduled at 3 p.m.: over the past year 72% of STX departures at that hour arrived on time, against 70% at 4 p.m., the worst hour.
What month has the most flight delays at STX?
August (70% on time). September is the best month (82%).
Why are flights delayed at STX?
The biggest cause was late-arriving aircraft (47% of delay minutes): the plane showed up late from its previous flight, so the delay started somewhere else. Then the airlines themselves (35%).
How often are flights cancelled at STX?
1.6% of scheduled departures over the past 12 months, peaking in January at 2.2%.
Hours are scheduled local departure times. "On time" means arriving less than 15 minutes late at the destination; cancelled and diverted flights count as not on time. Method.