Cyril E King Airport to Luis Munoz Marin International STT → SJU
59 nautical miles (68 statute miles) west on a straight line, true course 276°, about 289° magnetic at the departure end (variation 13W). At 120 knots that is 26 min at the quickest height in today's winds (39,000 ft, a 14-knot tailwind), arriving about 10:23 pm AST (02:23 UTC), after sunset at the destination. Right now STT is VFR, wind from the east (090°) at 7 knots; SJU is VFR, wind from the east-southeast (110°) at 4 knots. For planning, not a briefing: the legal preflight briefing comes from Flight Service (1-800-WX-BRIEF) or the FAA's own tools. Airlines fly this pair: 9,246 flights in the DOT's last twelve reported months, the route's page.
The route the straight line, the warnings crossed, restrictions, pilot reports and the airports along the way · click a mark for its words
Green, blue, red and purple airport dots are the flying conditions reported there now (VFR, marginal VFR, IFR, low IFR); grey means no report. Red areas are SIGMETs, orange areas AIRMETs, hatched red areas temporary flight restrictions. Map tiles: OpenFreeMap, data © OpenStreetMap contributors.
Warnings the route crosses SIGMETs and AIRMETs whose area the line passes through or comes within 25 nm of
No SIGMET or AIRMET covers any part of this route right now.
A SIGMET warns of weather hazardous to all aircraft; an AIRMET of weather that matters to small aircraft and to flying without instruments. "From 60 to 180 nm out" is measured along the route from STT.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
Not fetched just now.
Winds aloft along the route, and the time en route the forecast for use 20:00–03:00 UTC · at 120 knots true airspeed
The westbound cruising heights for this course (VFR: even thousands plus 500 ft; above 18,000 ft the forecast levels), with the wind averaged along the line from the 1 forecast point nearest it (MIA). A plus sign is a headwind, a minus sign a tailwind.
| Height | Average wind | Head- or tailwind | Temperature | Ground speed | Time en route | Arrival |
|---|---|---|---|---|---|---|
| 4,500 ft | 190° at 4 kt | 0 | 120 kt | 30 min | 10:27 pm AST (02:27 UTC) | |
| 6,500 ft | light and variable | 0 | 17 °C | 120 kt | 30 min | 10:27 pm AST (02:27 UTC) |
| 8,500 ft | 180° at 4 kt | 0 | 15 °C | 120 kt | 30 min | 10:27 pm AST (02:27 UTC) |
| 10,500 ft | 180° at 2 kt | 0 | 12 °C | 120 kt | 30 min | 10:27 pm AST (02:27 UTC) |
| 12,500 ft | light and variable | 0 | 8 °C | 120 kt | 30 min | 10:27 pm AST (02:27 UTC) |
| 14,500 ft | 190° at 4 kt | 0 | 3 °C | 120 kt | 30 min | 10:27 pm AST (02:27 UTC) |
| 16,500 ft | 190° at 7 kt | +1 kt | -2 °C | 119 kt | 30 min | 10:27 pm AST (02:27 UTC) |
| 18,000 ft FL180 | 190° at 10 kt | +1 kt | -5 °C | 119 kt | 30 min | 10:27 pm AST (02:27 UTC) |
| 24,000 ft FL240 | 160° at 10 kt | −4 kt | -16 °C | 124 kt | 29 min | 10:26 pm AST (02:26 UTC) |
| 30,000 ft FL300 | 150° at 13 kt | −8 kt | -30 °C | 128 kt | 28 min | 10:25 pm AST (02:25 UTC) |
| 34,000 ft FL340 | 160° at 26 kt | −11 kt | -40 °C | 131 kt | 27 min | 10:24 pm AST (02:24 UTC) |
| 39,000 ft FL390 | 150° at 23 kt | −14 kt | -52 °C | 134 kt | 26 min | 10:23 pm AST (02:23 UTC) |
Based on data from the 11th at 18:00 UTC; valid on the 12th at 00:00 UTC for use 20:00 to 03:00 UTC; temperatures above 24,000 ft are below zero. Heights are above sea level; a height is left out when the forecast has no wind for it over most of the line (the ground is higher). Ground speed is the airspeed less the headwind; the time en route is for the straight line and ignores climb, descent and routing around weather.
The forecast points as issued
| Point | From | 3,000 | 6,000 | 9,000 | 12,000 | 18,000 | 24,000 | 30,000 | 34,000 | 39,000 |
|---|---|---|---|---|---|---|---|---|---|---|
| MIA | used from 0 nm out; 939 nm from the line | 190/8 | L/V 18° | 180/5 14° | L/V 9° | 190/10 -5° | 160/10 -16° | 150/13 -30° | 160/26 -40° | 150/23 -52° |
The weather now: both ends and the airports along the way public airports with a weather report within 25 nm of the line, one for each stretch
| Airport | Where | Conditions | Wind | Visibility | Ceiling | Elevation | Reported |
|---|---|---|---|---|---|---|---|
| STT Charlotte Amalie, VI | departure | VFR | from the east (090°) at 7 knots | 10+ mi | none | 23 ft | 9:53 pm AST (01:53 UTC) |
| RVR Ceiba, PR | 39 nm out, 10 nm south of the line, tower | no report just now | 38 ft | ||||
| SJU San Juan, PR | destination | VFR Sky: a few clouds at 2,900 feet, scattered clouds at 3,700 feet | from the east-southeast (110°) at 4 knots | 10+ mi | none | 9 ft | 8:56 pm AST (00:56 UTC) |
The highest airport on this list sits at 38 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At SJU when you get there the forecast at the estimated arrival, 10:23 pm AST (02:23 UTC)
Wind from the east-southeast at 6 knots, visibility more than 6 miles, showers nearby, scattered clouds at 3,000 feet, scattered clouds at 6,000 feet VFR
The whole forecast for SJU
- From Sun 8:00 pm AST (00:00 UTC): wind from the east-southeast at 6 knots, visibility more than 6 miles, showers nearby, scattered clouds at 3,000 feet, scattered clouds at 6,000 feet
- From Mon 10:00 am AST (14:00 UTC): wind from the east at 11 knots, visibility more than 6 miles, showers nearby, a few clouds at 2,500 feet, scattered clouds at 4,000 feet
- From Mon 1:00 pm AST (17:00 UTC): wind from the east at 13 knots, gusting to 20, visibility more than 6 miles, light rain showers, thunderstorms nearby, scattered clouds at 2,500 feet (thunderheads), a broken layer at 5,000 feet
- From Mon 7:00 pm AST (23:00 UTC): wind from the east at 5 knots, visibility more than 6 miles, showers nearby, scattered clouds at 3,000 feet, scattered clouds at 6,000 feet
The forecast for STT, the departure
- From Sun 8:00 pm AST (00:00 UTC): wind from the east-northeast at 6 knots, visibility more than 6 miles, showers nearby, scattered clouds at 2,500 feet, a broken layer at 5,000 feet
- From Mon 9:00 am AST (13:00 UTC): wind from the east-southeast at 10 knots, visibility more than 6 miles, showers nearby, scattered clouds at 3,500 feet
- From Mon 7:00 pm AST (23:00 UTC): wind from the east at 7 knots, visibility more than 6 miles, showers nearby, scattered clouds at 2,500 feet, scattered clouds at 5,000 feet
Temporary flight restrictions on the line or within 25 nm of it
- 6/2698 VIEQUES, PR, Monday, January 19, 2026 through Friday, December 18, 2026 UTC 10 nm from the route, 20 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 18 December · ZSU
- 6/4508 CEIBA, PR 13 nm from the route, 39 nm along the route · security · ZSU
Daylight
Sunset at STT 5:59 pm AST (21:59 UTC), at SJU 6:03 pm AST (22:03 UTC) (civil twilight ends 6:25 pm AST (22:25 UTC)). At 120 knots the arrival at SJU is before sunrise there (6:16 am AST (10:16 UTC)).
Each restriction opens the FAA's own page with the exact area, heights and times. Ordinary notices to air missions (closed runways, lights out) are not shown: the FAA's notice search is not open to sites like this one at this time.
Radar and forecast charts for the regions crossed government pictures, the latest each time the page loads
Sources: the Aviation Weather Center's data service (SIGMETs, AIRMETs, graphical AIRMETs, pilot reports, winds and temperatures aloft, observations and terminal forecasts), the National Weather Service radar, the Weather Prediction Center's charts, the FAA's temporary flight restriction list and shapes, and the FAA's airport file for the positions, elevations and magnetic variation. Fetched when the page is viewed and kept a few minutes. Each leg is the straight line between its two airports; airways, terrain and airspace are not considered. The airports in detail: Cyril E King Airport, Luis Munoz Marin International.