Plan a flight · Sun 9:09 pm CDT (02:09 UTC)

Austin-Bergstrom International to Luis Munoz Marin International AUS → SJU

1,863 nautical miles (2,144 statute miles) east on a straight line, true course 105°, about 101° magnetic at the departure end (variation 4E). At 120 knots that is 14 h 54 min at the quickest height in today's winds (30,000 ft, a 5-knot tailwind), arriving about 1:03 pm AST (17:03 UTC). Right now AUS is VFR, wind from the south-southeast (150°) at 9 knots; SJU is VFR, wind calm. 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: 69 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

AIRMET TANGO 6W: moderate turbulence above 18,000 ft from 28,000 ft to 40,000 ft. Over the route from 588 to 588 nm out.

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 AUS.

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

B789 at 27,000 ft, 40 nm north, 7:30 pm CDT (00:30 UTC): moderate clear-air turbulence, remarks: zhu. 249 nm along the route, 40 nm north of the line.
as filed, and in English
```
LFT UA /OV LLA270030/TM 0030/FL270/TP B789/TB MOD CAT/RM ZHU
```
Report
a routine report filed through LFT
Where
30 nm west (270°) of LLA
Time
00:30 UTC
Height
at 27,000 ft
Aircraft
B789
Turbulence
moderate clear-air turbulence
Remarks
zhu
B39M at 27,000 ft, 19 nm north, 7:42 pm CDT (00:42 UTC): light chop turbulence, remarks: zhu. 120 nm along the route, 19 nm north of the line.
as filed, and in English
```
IAH UA /OV IH340035/TM 0042/FL270/TP B39M/TB LT CHOP DURC/RM ZHU
```
Report
a routine report filed through IAH
Where
IH340035
Time
00:42 UTC
Height
at 27,000 ft
Aircraft
B39M
Turbulence
lt chop during the climb
Remarks
zhu
A21N at 32,000 ft, 33 nm north, 6:15 pm CDT (23:15 UTC): light chop turbulence, remarks: zhu. 418 nm along the route, 33 nm north of the line.
as filed, and in English
```
MSY UA /OV LEV154030/TM 2315/FL320/TP A21N/TB LGT CHOP/RM ZHU
```
Report
a routine report filed through MSY
Where
30 nm southeast (154°) of LEV
Time
23:15 UTC
Height
at 32,000 ft
Aircraft
A21N
Turbulence
light chop
Remarks
zhu
A20N at 38,000 ft, 15 nm north, 7:14 pm CDT (00:14 UTC): no turbulence. 1036 nm along the route, 15 nm north of the line.
as filed, and in English
```
MIA UA /OV ZBV180060/TM 0014/FL380/TP A20N/TB NEG
```
Report
a routine report filed through MIA
Where
60 nm south (180°) of ZBV
Time
00:14 UTC
Height
at 38,000 ft
Aircraft
A20N
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 8 forecast points nearest it (CLL, HOU, LCH, MSY, MOB, PIE, EYW, 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	180° at 5 kt	+2 kt		118 kt	15 h 47 min	1:56 pm AST (17:56 UTC)
5,500 ft	190° at 2 kt	0		120 kt	15 h 32 min	1:41 pm AST (17:41 UTC)
7,500 ft	200° at 3 kt	0	15 °C	120 kt	15 h 32 min	1:41 pm AST (17:41 UTC)
9,500 ft	210° at 5 kt	−1 kt	12 °C	121 kt	15 h 24 min	1:33 pm AST (17:33 UTC)
11,500 ft	250° at 4 kt	−3 kt	9 °C	123 kt	15 h 09 min	1:18 pm AST (17:18 UTC)
13,500 ft	250° at 5 kt	−4 kt	5 °C	124 kt	15 h 01 min	1:10 pm AST (17:10 UTC)
15,500 ft	240° at 6 kt	−4 kt	1 °C	124 kt	15 h 01 min	1:10 pm AST (17:10 UTC)
17,500 ft	230° at 7 kt	−4 kt	-4 °C	124 kt	15 h 01 min	1:10 pm AST (17:10 UTC)
18,000 ft FL180	230° at 8 kt	−4 kt	-5 °C	124 kt	15 h 01 min	1:10 pm AST (17:10 UTC)
24,000 ft FL240	230° at 7 kt	−3 kt	-16 °C	123 kt	15 h 09 min	1:18 pm AST (17:18 UTC)
30,000 ft FL300	280° at 5 kt	−5 kt	-31 °C	125 kt	14 h 54 min	1:03 pm AST (17:03 UTC)
34,000 ft FL340	200° at 4 kt	+1 kt	-41 °C	119 kt	15 h 39 min	1:48 pm AST (17:48 UTC)
39,000 ft FL390	160° at 3 kt	+3 kt	-52 °C	117 kt	15 h 55 min	2:04 pm AST (18:04 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
CLL	used from 0 nm out; 53 nm from the line	160/18	190/18 16°	200/19 12°	220/14 7°	260/18 -5°	250/20 -13°	290/29 -29°	290/31 -40°	300/22 -53°
HOU	used from 100 nm out; 5 nm from the line	160/18	160/14 17°	180/19 12°	190/11 8°	260/12 -4°	260/14 -13°	310/26 -30°	310/30 -40°	320/21 -52°
LCH	used from 199 nm out; 60 nm from the line	190/6	180/8 18°	170/13 12°	220/12 7°	290/10 -4°	280/15 -14°	320/30 -31°	320/32 -40°	320/39 -53°
MSY	used from 299 nm out; 111 nm from the line	L/V	020/6 18°	L/V 12°	300/11 7°	330/15 -4°	320/22 -16°	330/38 -32°	350/47 -42°	340/56 -52°
MOB	used from 548 nm out; 208 nm from the line	310/7	350/18 18°	330/16 12°	300/18 7°	320/17 -6°	330/27 -17°	340/52 -33°	350/53 -43°	330/38 -50°
PIE	used from 598 nm out; 205 nm from the line	310/7	270/12 17°	270/14 13°	260/14 8°	240/22 -5°	230/24 -16°	220/26 -31°	200/31 -41°	180/33 -53°
EYW	used from 797 nm out; 101 nm from the line	090/8	100/8 19°	L/V 14°	L/V 8°	160/8 -5°	170/8 -15°	360/6 -32°	050/8 -42°	100/17 -52°
MIA	used from 946 nm out; 54 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
AUS Austin, TX	departure	VFR Sky: a few clouds at 12,000 feet, a few clouds at 25,000 feet	from the south-southeast (150°) at 9 knots	10+ mi	none	541 ft	8:53 pm CDT (01:53 UTC)
HOU Houston, TX	129 nm out, 2 nm north of the line, tower	VFR Sky: a few clouds at 25,000 feet	from the southeast (140°) at 6 knots	10+ mi	none	46 ft	01:53 UTC
MTH Marathon, FL	946 nm out, 24 nm southwest of the line	VFR	from the east (090°) at 6 knots	10+ mi	none	7 ft	01:53 UTC
MYAK Congo Town,	1126 nm out, 21 nm northeast of the line	no report just now				20 ft
MBPV Providenciales,	1454 nm out, 16 nm northeast of the line, tower	VFR Sky: scattered clouds at 1,400 feet	from the northeast (050°) at 7 knots	6+ mi	none	13 ft	02:00 UTC
MBSC Cockburn Harbour,	1504 nm out, 21 nm north of the line	VFR Sky: scattered clouds at 1,200 feet	from the east (090°) at 11 knots	6+ mi	none	9 ft	21:00 UTC
ABO Arecibo, PR	1833 nm out, 18 nm southwest of the line	no report just now				20 ft
SJU San Juan, PR	destination	VFR Sky: scattered clouds at 2,400 feet	calm	10+ mi	none	9 ft	9:56 pm AST (01:56 UTC)

The highest airport on this list sits at 541 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, 1:03 pm AST (17:03 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 VFR

The whole forecast for SJU

From Sun 10:00 pm AST (02:00 UTC): wind from the east-southeast at 6 knots, visibility more than 6 miles, light rain showers, scattered clouds at 2,500 feet, scattered clouds at 5,000 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 AUS, the departure

From Sun 7:00 pm CDT (00:00 UTC): wind from the south at 14 knots, visibility more than 6 miles, a few clouds at 6,000 feet, scattered clouds at 25,000 feet
From Sun 10:00 pm CDT (03:00 UTC): wind from the south-southeast at 6 knots, visibility more than 6 miles, scattered clouds at 1,500 feet
From Mon 7:00 am CDT (12:00 UTC): wind from the south-southeast at 3 knots, visibility more than 6 miles, a broken layer at 1,500 feet
From Mon 12:00 pm CDT (17:00 UTC): wind from the south at 11 knots, visibility more than 6 miles, a broken layer at 2,500 feet
From Mon 2:00 pm CDT (19:00 UTC): wind from the south at 13 knots, visibility more than 6 miles, a broken layer at 4,000 feet

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

6/5849 Austin, TX, Friday, October 2, 2026 through Monday, October 12, 2026 UTC 6 nm from the route, at the departure end · drones kept away from a public gathering · until 12 October · ZHU
6/4508 CEIBA, PR 24 nm from the route, at the destination end · security · ZSU

Daylight

Sunset at AUS 7:03 pm CDT (00:03 UTC), at SJU 6:03 pm AST (22:03 UTC) (civil twilight ends 6:25 pm AST (22:25 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 southern Plains · loop National Weather Service

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: Austin-Bergstrom International, Luis Munoz Marin International.