Plan a flight · Sun 8:37 pm EDT (00:37 UTC)

Jacksonville International to Luis Munoz Marin International JAX → SJU

1,120 nautical miles (1,288 statute miles) southeast on a straight line, true course 127°, about 133° magnetic at the departure end (variation 6W). At 120 knots that is 9 h 06 min at the quickest height in today's winds (11,500 ft, a 3-knot tailwind), arriving about 5:43 am AST (09:43 UTC), after sunset at the destination. Right now JAX is VFR, wind from the west (260°) at 4 knots; SJU is VFR, wind from the southeast (130°) at 3 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 EDT (01:55 UTC). Over the route from 150 to 220 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 JAX.

Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first

B752 at 39,000 ft, 4 nm south, 6:01 pm EDT (22:01 UTC): no turbulence. At the departure 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
CL30 at 42,000 ft, 30 nm northeast, 6:32 pm EDT (22:32 UTC): light clear-air turbulence. 50 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
A321 at 34,000 ft, 39 nm southwest, 7:47 pm EDT (23:47 UTC): no turbulence. 70 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 EDT (21:43 UTC): a routine report with nothing remarked on. 70 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
A21N at 34,000 ft, 27 nm northeast, 7:48 pm EDT (23:48 UTC): no turbulence. 150 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
B763 at 32,000 ft, 13 nm southwest, 7:47 pm EDT (23:47 UTC): no turbulence. 170 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

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 eastbound cruising heights for this course (VFR: odd 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 (JAX, MLB, 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
3,500 ft	210° at 6 kt	+1 kt		119 kt	9 h 25 min	6:02 am AST (10:02 UTC)
5,500 ft	250° at 4 kt	−2 kt		122 kt	9 h 11 min	5:48 am AST (09:48 UTC)
7,500 ft	240° at 5 kt	−1 kt	16 °C	121 kt	9 h 15 min	5:52 am AST (09:52 UTC)
9,500 ft	220° at 6 kt	−1 kt	13 °C	121 kt	9 h 15 min	5:52 am AST (09:52 UTC)
11,500 ft	250° at 5 kt	−3 kt	10 °C	123 kt	9 h 06 min	5:43 am AST (09:43 UTC)
13,500 ft	230° at 7 kt	−2 kt	6 °C	122 kt	9 h 11 min	5:48 am AST (09:48 UTC)
15,500 ft	220° at 10 kt	0	1 °C	120 kt	9 h 20 min	5:57 am AST (09:57 UTC)
17,500 ft	210° at 13 kt	+1 kt	-4 °C	119 kt	9 h 25 min	6:02 am AST (10:02 UTC)
18,000 ft FL180	210° at 14 kt	+1 kt	-5 °C	119 kt	9 h 25 min	6:02 am AST (10:02 UTC)
24,000 ft FL240	190° at 13 kt	+6 kt	-16 °C	114 kt	9 h 49 min	6:26 am AST (10:26 UTC)
30,000 ft FL300	180° at 15 kt	+9 kt	-30 °C	111 kt	10 h 05 min	6:42 am AST (10:42 UTC)
34,000 ft FL340	170° at 27 kt	+20 kt	-40 °C	100 kt	11 h 12 min	7:49 am AST (11:49 UTC)
39,000 ft FL390	170° at 24 kt	+20 kt	-52 °C	100 kt	11 h 12 min	7:49 am AST (11:49 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
JAX	used from 0 nm out; 25 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°
MLB	used from 100 nm out; 82 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°
MIA	used from 300 nm out; 204 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
JAX Jacksonville, FL	departure	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)
SGJ St Augustine, FL	30 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
SJU San Juan, PR	destination	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)

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 SJU when you get there the forecast at the estimated arrival, 5:43 am AST (09:43 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 JAX, the departure

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

Temporary flight restrictions on the line or within 25 nm of it

6/8389 Jacksonville, FL, Thursday, October 15, 2026 through Sunday, October 18, 2026 UTC 7 nm from the route, at the departure end · air shows/sports · starts Thursday 15 October · ZJX
6/4508 CEIBA, PR 24 nm from the route, at the destination end · security · ZSU

Daylight

Sunset at JAX 6:59 pm EDT (22:59 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

Radar now, the Southeast · loop National Weather Service

Radar now, the Caribbean · loop National Weather Service

Radar, the whole country · loop National Weather Service

Surface analysis now Weather Prediction Center

Forecast chart, 12 hours ahead Weather Prediction Center

Forecast chart, 24 hours ahead Weather Prediction Center

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: Jacksonville International, Luis Munoz Marin International.