Cyril E King Airport to San Antonio International STT → SAT
1,949 nautical miles (2,242 statute miles) northwest on a straight line, true course 297°, about 310° magnetic at the departure end (variation 13W). At 120 knots that is 15 h 59 min at the quickest height in today's winds (4,500 ft, a 2-knot tailwind), arriving about 9:00 pm CDT (02:00 UTC), after sunset at the destination. 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: 1 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 08:00–15:00 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 9 forecast points nearest it (MIA, EYW, PIE, MOB, MSY, LCH, HOU, PSX, SAT). 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 | 160° at 4 kt | −2 kt | 122 kt | 15 h 59 min | 9:00 pm CDT (02:00 UTC) | |
| 6,500 ft | 160° at 3 kt | −1 kt | 16 °C | 121 kt | 16 h 06 min | 9:07 pm CDT (02:07 UTC) |
| 8,500 ft | 170° at 1 kt | −1 kt | 14 °C | 121 kt | 16 h 06 min | 9:07 pm CDT (02:07 UTC) |
| 10,500 ft | light and variable | 0 | 10 °C | 120 kt | 16 h 14 min | 9:15 pm CDT (02:15 UTC) |
| 12,500 ft | 270° at 1 kt | +1 kt | 7 °C | 119 kt | 16 h 23 min | 9:24 pm CDT (02:24 UTC) |
| 14,500 ft | 280° at 3 kt | +3 kt | 2 °C | 117 kt | 16 h 39 min | 9:40 pm CDT (02:40 UTC) |
| 16,500 ft | 280° at 6 kt | +6 kt | -2 °C | 114 kt | 17 h 06 min | 10:07 pm CDT (03:07 UTC) |
| 18,000 ft FL180 | 280° at 7 kt | +7 kt | -6 °C | 113 kt | 17 h 15 min | 10:16 pm CDT (03:16 UTC) |
| 24,000 ft FL240 | 270° at 10 kt | +10 kt | -16 °C | 110 kt | 17 h 43 min | 10:44 pm CDT (03:44 UTC) |
| 30,000 ft FL300 | 300° at 18 kt | +18 kt | -32 °C | 102 kt | 19 h 06 min | 12:07 am CDT (05:07 UTC) |
| 34,000 ft FL340 | 290° at 21 kt | +21 kt | -41 °C | 99 kt | 19 h 41 min | 12:42 am CDT (05:42 UTC) |
| 39,000 ft FL390 | 310° at 19 kt | +17 kt | -52 °C | 103 kt | 18 h 55 min | 11:56 pm CDT (04:56 UTC) |
Based on data from the 12th at 06:00 UTC; valid on the 12th at 12:00 UTC for use 08:00 to 15:00 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; 937 nm from the line | L/V | L/V 17° | L/V 13° | L/V 8° | 270/6 -6° | 250/9 -17° | 290/17 -32° | 280/25 -41° | 280/21 -52° |
| EYW | used from 949 nm out; 47 nm from the line | 080/9 | 050/5 18° | 070/5 13° | 060/6 9° | L/V -6° | 280/11 -17° | 260/18 -32° | 250/21 -41° | 260/21 -52° |
| PIE | used from 1149 nm out; 148 nm from the line | 360/10 | 340/12 18° | 330/9 13° | 290/12 8° | 260/21 -7° | 280/18 -18° | 250/20 -33° | 250/26 -41° | 250/20 -51° |
| MOB | used from 1299 nm out; 242 nm from the line | L/V | L/V 18° | 020/8 11° | L/V 6° | 330/12 -5° | 330/23 -17° | 330/30 -32° | 350/39 -41° | 340/40 -53° |
| MSY | used from 1349 nm out; 214 nm from the line | 150/9 | 140/8 18° | L/V 13° | L/V 6° | 320/15 -5° | 310/16 -16° | 320/32 -31° | 340/35 -40° | 350/34 -52° |
| LCH | used from 1599 nm out; 121 nm from the line | 170/21 | 160/23 18° | 170/13 13° | 170/6 8° | 300/12 -7° | 280/16 -14° | 320/27 -30° | 330/23 -41° | 340/38 -51° |
| HOU | used from 1699 nm out; 78 nm from the line | 180/22 | 180/20 16° | 170/7 15° | L/V 8° | 220/11 -6° | 260/15 -13° | 310/20 -30° | 320/20 -40° | 350/32 -51° |
| PSX | used from 1799 nm out; 21 nm from the line | 160/24 | 190/17 17° | 200/10 15° | L/V 8° | 260/7 -5° | 220/10 -12° | 310/11 -30° | 320/13 -40° | 010/29 -51° |
| SAT | used from 1899 nm out; 25 nm from the line | 160/18 | 180/22 17° | 190/16 14° | 210/16 9° | 220/16 -5° | 200/11 -14° | 250/8 -29° | 330/8 -40° | 020/26 -51° |
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 | no report just now | 23 ft | ||||
| SJU San Juan, PR | 60 nm out, 21 nm south of the line, tower | no report just now | 9 ft | ||||
| MBPV Providenciales, | 460 nm out, 11 nm northeast of the line, tower | no report just now | 13 ft | ||||
| MTH Marathon, FL | 979 nm out, 10 nm south of the line | no report just now | 7 ft | ||||
| BAZ New Braunfels, TX | 1929 nm out, 15 nm north of the line, tower | no report just now | 658 ft | ||||
| SAT San Antonio, TX | destination | no report just now | 809 ft |
The highest airport on this list sits at 809 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At SAT when you get there the forecast at the estimated arrival, 9:00 pm CDT (02:00 UTC)
SAT has no terminal forecast; use the nearest airport that does.
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 16 nm from the route, at the departure end · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 18 December · ZSU
Daylight
Sunset at STT 5:59 pm AST (21:59 UTC), at SAT 7:05 pm CDT (00:05 UTC) (civil twilight ends 7:29 pm CDT (00:29 UTC)). At 120 knots the arrival at SAT is after sunset there (7:06 pm CDT (00:06 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, San Antonio International.