Luis Munoz Marin International to Jacksonville International SJU → JAX
1,120 nautical miles (1,288 statute miles) northwest on a straight line, true course 313°, about 324° magnetic at the departure end (variation 11W). At 120 knots that is 8 h at the quickest height in today's winds (34,000 ft, a 20-knot tailwind), arriving about 4:37 am EDT (08:37 UTC), after sunset at the destination. Right now SJU is VFR, wind from the southeast (130°) at 3 knots; JAX is VFR, wind from the west (260°) 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: 774 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
- SIGMET E18E: thunderstorms (a convective SIGMET) up to 45,000 ft, moving from the southwest at 15 knots, until 9:55 pm AST (01:55 UTC). Over the route from 900 to 970 nm out.
as issued
WSUS31 KKCI 112355 MKCE WST 112355 CONVECTIVE SIGMET 18E VALID UNTIL 0155Z FL AND FL GA CSTL WTRS FROM 180SSE ILM-150ENE TRV-60NE PBI-20S TRV-140SE CHS-180SSE ILM AREA TS MOV FROM 23015KT. TOPS ABV FL450.
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 SJU.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- B763 at 32,000 ft, 13 nm southwest, 7:47 pm AST (23:47 UTC): no turbulence. 950 nm along the route, 13 nm southwest of the line.
as filed, and in English
MLB UA /OV MLB075080/TM 2347/FL320/TP B763/TB NEG
- Report
- a routine report filed through MLB
- Where
- 80 nm east (075°) of MLB
- Time
- 23:47 UTC
- Height
- at 32,000 ft
- Aircraft
- B763
- Turbulence
- none
- A21N at 34,000 ft, 27 nm northeast, 7:48 pm AST (23:48 UTC): no turbulence. 970 nm along the route, 27 nm northeast of the line.
as filed, and in English
OMN UA /OV OMN090110/TM 2348/FL340/TP A21N/TB NEG
- Report
- a routine report filed through OMN
- Where
- 110 nm east (090°) of OMN
- Time
- 23:48 UTC
- Height
- at 34,000 ft
- Aircraft
- A21N
- Turbulence
- none
- A321 at 34,000 ft, 39 nm southwest, 7:47 pm AST (23:47 UTC): no turbulence. 1050 nm along the route, 39 nm southwest of the line.
as filed, and in English
OMN UA /OV OMN/TM 2347/FL340/TP A321/TB NEG
- Report
- a routine report filed through OMN
- Where
- over OMN
- Time
- 23:47 UTC
- Height
- at 34,000 ft
- Aircraft
- A321
- Turbulence
- none
- C172 at 2,000 ft, 39 nm southwest, 5:43 pm AST (21:43 UTC): a routine report with nothing remarked on. 1050 nm along the route, 39 nm southwest of the line.
as filed, and in English
DAB UA /OV OMN/TM 2143/FL020/TP C172/SK CLOUDS ABOVE 100/WX 10SM
- Report
- a routine report filed through DAB
- Where
- over OMN
- Time
- 21:43 UTC
- Height
- at 2,000 ft
- Aircraft
- C172
- Sky
- clouds above 10,000 ft
- Weather
- 10SM
- CL30 at 42,000 ft, 30 nm northeast, 6:32 pm AST (22:32 UTC): light clear-air turbulence. 1070 nm along the route, 30 nm northeast of the line.
as filed, and in English
JAX UA /OV CRG090050/TM 2232/FL420/TP CL30/TB OCNL LGT CAT
- Report
- a routine report filed through JAX
- Where
- 50 nm east (090°) of CRG
- Time
- 22:32 UTC
- Height
- at 42,000 ft
- Aircraft
- CL30
- Turbulence
- occasional light clear-air turbulence
- B752 at 39,000 ft, 4 nm south, 6:01 pm AST (22:01 UTC): no turbulence. At the destination end, 4 nm south of the line.
as filed, and in English
JAX UA /OV CRG/TM 2201/FL390/TP B752/TB NEG
- Report
- a routine report filed through JAX
- Where
- over CRG
- Time
- 22:01 UTC
- Height
- at 39,000 ft
- Aircraft
- B752
- Turbulence
- none
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 3 forecast points nearest it (MIA, MLB, JAX). 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 | 220° at 5 kt | 0 | 120 kt | 9 h 20 min | 5:57 am EDT (09:57 UTC) | |
| 6,500 ft | 250° at 4 kt | +2 kt | 17 °C | 118 kt | 9 h 29 min | 6:06 am EDT (10:06 UTC) |
| 8,500 ft | 220° at 6 kt | 0 | 15 °C | 120 kt | 9 h 20 min | 5:57 am EDT (09:57 UTC) |
| 10,500 ft | 230° at 6 kt | +1 kt | 12 °C | 119 kt | 9 h 25 min | 6:02 am EDT (10:02 UTC) |
| 12,500 ft | 250° at 5 kt | +2 kt | 8 °C | 118 kt | 9 h 29 min | 6:06 am EDT (10:06 UTC) |
| 14,500 ft | 230° at 8 kt | +1 kt | 3 °C | 119 kt | 9 h 25 min | 6:02 am EDT (10:02 UTC) |
| 16,500 ft | 220° at 12 kt | 0 | -2 °C | 120 kt | 9 h 20 min | 5:57 am EDT (09:57 UTC) |
| 18,000 ft FL180 | 210° at 14 kt | −2 kt | -5 °C | 122 kt | 9 h 11 min | 5:48 am EDT (09:48 UTC) |
| 24,000 ft FL240 | 190° at 13 kt | −7 kt | -16 °C | 127 kt | 8 h 49 min | 5:26 am EDT (09:26 UTC) |
| 30,000 ft FL300 | 180° at 15 kt | −9 kt | -30 °C | 129 kt | 8 h 41 min | 5:18 am EDT (09:18 UTC) |
| 34,000 ft FL340 | 170° at 27 kt | −20 kt | -40 °C | 140 kt | 8 h | 4:37 am EDT (08:37 UTC) |
| 39,000 ft FL390 | 170° at 24 kt | −19 kt | -52 °C | 139 kt | 8 h 03 min | 4:40 am EDT (08:40 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; 884 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° |
| MLB | used from 800 nm out; 184 nm from the line | 240/7 | 240/11 17° | 240/13 13° | 250/15 8° | 230/25 -5° | 210/25 -16° | 210/24 -31° | 190/29 -41° | 190/27 -53° |
| JAX | used from 1050 nm out; 45 nm from the line | 280/14 | 300/22 16° | 260/27 15° | 260/26 9° | 240/41 -6° | 230/38 -16° | 220/44 -32° | 200/49 -41° | 200/52 -53° |
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 |
|---|---|---|---|---|---|---|---|
| SJU San Juan, PR | departure | VFR Sky: a few clouds at 2,800 feet, a few clouds at 4,500 feet | from the southeast (130°) at 3 knots | 10+ mi | none | 9 ft | 7:56 pm AST (23:56 UTC) |
| SGJ St Augustine, FL | 1090 nm out, 15 nm southwest of the line, tower | VFR | from the south-southwest (210°) at 4 knots | 10+ mi | none | 9 ft | 23:56 UTC |
| JAX Jacksonville, FL | destination | VFR Sky: a few clouds at 13,000 feet, a broken layer at 20,000 feet | from the west (260°) at 4 knots | 10+ mi | 20,000 ft | 29 ft | 7:56 pm EDT (23:56 UTC) |
The highest airport on this list sits at 29 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At JAX when you get there the forecast at the estimated arrival, 4:37 am EDT (08:37 UTC)
Wind from the west at 5 knots, visibility more than 6 miles, a few clouds at 15,000 feet, scattered clouds at 25,000 feet VFR
The whole forecast for JAX
- From Sun 8:00 pm EDT (00:00 UTC): wind from the west at 5 knots, visibility more than 6 miles, a few clouds at 15,000 feet, scattered clouds at 25,000 feet
- From Mon 10:00 am EDT (14:00 UTC): wind from the northwest at 11 knots, gusting to 17, visibility more than 6 miles, a few clouds at 3,500 feet
- From Mon 6:00 pm EDT (22:00 UTC): wind from the north-northwest at 6 knots, visibility more than 6 miles, clear skies
The forecast for SJU, the departure
- 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
Temporary flight restrictions on the line or within 25 nm of it
- 6/4508 CEIBA, PR 24 nm from the route, at the departure end · security · ZSU
- 6/8389 Jacksonville, FL, Thursday, October 15, 2026 through Sunday, October 18, 2026 UTC 7 nm from the route, at the destination end · air shows/sports · starts Thursday 15 October · ZJX
Daylight
Sunset at SJU 6:03 pm AST (22:03 UTC), at JAX 6:59 pm EDT (22:59 UTC) (civil twilight ends 7:23 pm EDT (23:23 UTC)). At 120 knots the arrival at JAX is before sunrise there (7:26 am EDT (11:26 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: Luis Munoz Marin International, Jacksonville International.