Plan a flight · Mon 6:37 am CDT (11:37 UTC)

Nashville International to San Antonio International BNA → SAT

714 nautical miles (821 statute miles) southwest on a straight line, true course 240°, about 243° magnetic at the departure end (variation 3W). At 120 knots that is 6 h 03 min at the quickest height in today's winds (39,000 ft, a 2-knot headwind), arriving about 12:40 pm CDT (17:40 UTC). Right now BNA is VFR, wind calm; SAT is marginal VFR, wind from the east-southeast (120°) at 5 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: 1,887 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 SIERRA 3E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the first 20 nm of the route.

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 BNA.

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

A320 at 21,000 ft, 37 nm southeast, 5:45 am CDT (10:45 UTC): moderate chop turbulence, remarks: zhu. 664 nm along the route, 37 nm southeast of the line.
as filed, and in English
```
SAT UA /OV SAT090060/TM 1045/FL210/TP A320/TB OCNL MOD CHOP/RM ZHU
```
Report
a routine report filed through SAT
Where
60 nm east (090°) of SAT
Time
10:45 UTC
Height
at 21,000 ft
Aircraft
A320
Turbulence
occasional moderate chop
Remarks
zhu
E75L at 33,000 ft, 40 nm northeast, 6:09 am CDT (11:09 UTC): no turbulence, remarks: ZME62. At the departure end, 40 nm northeast of the line.
as filed, and in English
```
BNA UA /OV BNA045040/TM 1109/FL330/TP E75L/TB NEG/RM ZME62
```
Report
a routine report filed through BNA
Where
40 nm northeast (045°) of BNA
Time
11:09 UTC
Height
at 33,000 ft
Aircraft
E75L
Turbulence
none
Remarks
ZME62
B738 at 38,000 ft, 7 nm northwest, 6:22 am CDT (11:22 UTC): no turbulence, remarks: zhu. 654 nm along the route, 7 nm northwest of the line.
as filed, and in English
```
AUS UA /OV KCWK360015/TM 1122/FL380/TP B738/TB NEG/RM ZHU
```
Report
a routine report filed through AUS
Where
15 nm north (360°) of KCWK
Time
11:22 UTC
Height
at 38,000 ft
Aircraft
B738
Turbulence
none
Remarks
zhu
B748 at 40,000 ft, 7 nm northwest, 6:17 am CDT (11:17 UTC): no turbulence, remarks: smooth zhu. 654 nm along the route, 7 nm northwest of the line.
as filed, and in English
```
AUS UA /OV KCWK270015/TM 1117/FL400/TP B748/TB NEG/RM SMOOTH ZHU
```
Report
a routine report filed through AUS
Where
15 nm west (270°) of KCWK
Time
11:17 UTC
Height
at 40,000 ft
Aircraft
B748
Turbulence
none
Remarks
smooth zhu
B737 at 1,800 ft, 7 nm north, 6:18 am CDT (11:18 UTC): remarks: KSAT base 1,800 ft, on top 3,500 ft. At the destination end, 7 nm north of the line.
as filed, and in English
```
SAT UA /OV SAT/TM 1118/FL018/TP B737/RM KSAT BASE 018, ON TOP 035
```
Report
a routine report filed through SAT
Where
over SAT
Time
11:18 UTC
Height
at 1,800 ft
Aircraft
B737
Remarks
KSAT base 1,800 ft, on top 3,500 ft
A320 at 2,300 ft, 7 nm north, 5:37 am CDT (10:37 UTC): remarks: KSAT base 2,300 ft, on top 4,000 ft. At the destination end, 7 nm north of the line.
as filed, and in English
```
SAT UA /OV SAT/TM 1037/FL023/TP A320/RM KSAT BASE 023, ON TOP 040
```
Report
a routine report filed through SAT
Where
over SAT
Time
10:37 UTC
Height
at 2,300 ft
Aircraft
A320
Remarks
KSAT base 2,300 ft, on top 4,000 ft

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 6 forecast points nearest it (BNA, MEM, LIT, SHV, CLL, 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	220° at 15 kt	+15 kt		105 kt	6 h 48 min	1:25 pm CDT (18:25 UTC)
6,500 ft	230° at 15 kt	+15 kt	16 °C	105 kt	6 h 48 min	1:25 pm CDT (18:25 UTC)
8,500 ft	240° at 14 kt	+14 kt	13 °C	106 kt	6 h 44 min	1:21 pm CDT (18:21 UTC)
10,500 ft	240° at 13 kt	+13 kt	10 °C	107 kt	6 h 40 min	1:17 pm CDT (18:17 UTC)
12,500 ft	250° at 13 kt	+13 kt	6 °C	107 kt	6 h 40 min	1:17 pm CDT (18:17 UTC)
14,500 ft	260° at 14 kt	+14 kt	1 °C	106 kt	6 h 44 min	1:21 pm CDT (18:21 UTC)
16,500 ft	260° at 15 kt	+14 kt	-3 °C	106 kt	6 h 44 min	1:21 pm CDT (18:21 UTC)
18,000 ft FL180	260° at 16 kt	+15 kt	-6 °C	105 kt	6 h 48 min	1:25 pm CDT (18:25 UTC)
24,000 ft FL240	270° at 19 kt	+16 kt	-16 °C	104 kt	6 h 52 min	1:29 pm CDT (18:29 UTC)
30,000 ft FL300	300° at 31 kt	+15 kt	-30 °C	105 kt	6 h 48 min	1:25 pm CDT (18:25 UTC)
34,000 ft FL340	310° at 36 kt	+12 kt	-40 °C	108 kt	6 h 37 min	1:14 pm CDT (18:14 UTC)
39,000 ft FL390	320° at 37 kt	+2 kt	-51 °C	118 kt	6 h 03 min	12:40 pm CDT (17:40 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
BNA	used from 0 nm out; 25 nm from the line	300/20	300/14 15°	300/14 10°	300/13 4°	310/22 -5°	280/24 -18°	310/37 -33°	310/50 -41°	320/49 -51°
MEM	used from 99 nm out; 55 nm from the line	250/19	260/19 17°	270/20 12°	270/16 6°	270/21 -6°	290/27 -17°	300/37 -30°	300/49 -40°	310/40 -51°
LIT	used from 248 nm out; 72 nm from the line	250/22	250/25 18°	240/23 12°	240/20 7°	250/17 -6°	260/25 -17°	300/45 -29°	300/49 -40°	310/43 -51°
SHV	used from 347 nm out; 46 nm from the line	210/20	210/20 18°	230/20 11°	240/16 7°	270/17 -7°	250/11 -15°	300/34 -30°	310/34 -40°	320/36 -51°
CLL	used from 496 nm out; 69 nm from the line	180/24	170/21 19°	180/10 14°	230/7 8°	230/16 -6°	260/20 -13°	290/23 -29°	320/21 -39°	340/35 -51°
SAT	used from 644 nm out; 45 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
BNA Nashville, TN	departure	VFR	calm	9 mi	none	599 ft	5:53 am CDT (10:53 UTC)
GHM Centerville, TN	40 nm out, 4 nm northwest of the line	no report just now				765 ft
SZY Selmer, TN	109 nm out, 5 nm east of the line	VFR	calm	10+ mi	none	610 ft	10:55 UTC
OLV Olive Branch, MS	168 nm out, 20 nm northwest of the line, tower	reported, no category	from the south (180°) at 6 knots	10+ mi	none	401 ft	10:55 UTC
GLH Greenville, MS	268 nm out, 24 nm southeast of the line, tower	VFR	from the southwest (230°) at 5 knots	10+ mi	none	130 ft	10:53 UTC
LLQ Monticello, AR	287 nm out, 6 nm west of the line	VFR	from the west-southwest (250°) at 5 knots	10+ mi	none	267 ft	10:53 UTC
SHV Shreveport, LA	416 nm out, 4 nm northwest of the line, tower	VFR	from the south-southeast (160°) at 5 knots	10+ mi	none	257 ft	10:56 UTC
OCH Nacogdoches, TX	486 nm out, 14 nm southeast of the line	reported, no category	calm		none	343 ft	10:56 UTC
DKR Crockett, TX	525 nm out, 8 nm southeast of the line	no report just now				348 ft
CLL College Station, TX	585 nm out, 14 nm southeast of the line, tower	VFR Sky: scattered clouds at 2,700 feet	from the east (100°) at 3 knots	10+ mi	none	320 ft	10:53 UTC
HYI Austin, TX	674 nm out, 2 nm south of the line, tower	marginal VFR Sky: a broken layer at 1,900 feet, overcast at 2,400 feet	from the east (090°) at 3 knots	10+ mi	1,900 ft	594 ft	10:56 UTC
SAT San Antonio, TX	destination	marginal VFR Sky: a broken layer at 1,800 feet, overcast at 2,800 feet	from the east-southeast (120°) at 5 knots	10+ mi	1,800 ft	809 ft	5:51 am CDT (10:51 UTC)

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, 12:40 pm CDT (17:40 UTC)

Wind from the south-southeast at 12 knots, visibility more than 6 miles, showers nearby, a broken layer at 3,500 feet VFR

The whole forecast for SAT

From Mon 4:00 am CDT (09:00 UTC): wind from the southeast at 6 knots, visibility more than 6 miles, a broken layer at 2,700 feet
From Mon 5:00 am CDT (10:00 UTC): wind from the southeast at 5 knots, visibility more than 6 miles, overcast at 1,500 feet
From Mon 12:00 pm CDT (17:00 UTC): wind from the south-southeast at 12 knots, visibility more than 6 miles, showers nearby, a broken layer at 3,500 feet
From Tue 2:00 am CDT (07:00 UTC): wind from the south-southeast at 9 knots, visibility more than 6 miles, overcast at 1,500 feet
At times between Tue 4:00 am CDT (09:00 UTC) and 7:00 am CDT (12:00 UTC): a broken layer at 800 feet

The forecast for BNA, the departure

From Mon 1:00 am CDT (06:00 UTC): wind from the south at 4 knots, visibility 6 miles, mist, clear skies
From Mon 7:00 am CDT (12:00 UTC): wind from the south at 2 knots, visibility 5 miles, mist, scattered clouds at 300 feet
From Mon 9:00 am CDT (14:00 UTC): wind from the west-southwest at 7 knots, visibility more than 6 miles, a few clouds at 20,000 feet
From Mon 8:00 pm CDT (01:00 UTC): wind from the south-southwest at 6 knots, visibility more than 6 miles, clear skies

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

6/0708 Goodlettsville, TN, Saturday, August 1, 2026 through Sunday, August 1, 2027 UTC 13 nm from the route, at the departure end · security · until 1 August · ZME

Daylight

Sunset at BNA 6:15 pm CDT (23:15 UTC), at SAT 7:05 pm CDT (00:05 UTC) (civil twilight ends 7:29 pm CDT (00:29 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 lower Mississippi valley · loop National Weather Service

Radar now, the southern Plains · 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: Nashville International, San Antonio International.