Plan a flight · Mon 1:03 am CDT (06:03 UTC)

San Antonio International to Philadelphia International SAT → PHL

1,298 nautical miles (1,494 statute miles) northeast on a straight line, true course 055°, about 051° magnetic at the departure end (variation 4E). At 120 knots that is 9 h 05 min at the quickest height in today's winds (34,000 ft, a 23-knot tailwind), arriving about 11:08 am EDT (15:08 UTC). Right now SAT is marginal VFR, wind from the southeast (130°) at 9 knots; PHL is marginal VFR, wind from the northeast (050°) at 10 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: 534 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 last 619 nm of the route.
AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 809 to 1148 nm out.
AIRMET TANGO 5W: moderate turbulence below 18,000 ft (due to mountain wave) up to 10,000 ft. Over the route from 1029 to 1088 nm out.
AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the last 190 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 SAT.

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

B38M at 20,000 ft, 1 nm west, 10:11 pm CDT (03:11 UTC): moderate clear-air turbulence from 20,000 ft to 25,000 ft. 1168 nm along the route, 1 nm west of the line.
as filed, and in English
```
IAD UA /OV AML300020/TM 0311/FL200/TP B38M/TB MOD CAT 200-250
```
Report
a routine report filed through IAD
Where
20 nm northwest (300°) of AML
Time
03:11 UTC
Height
at 20,000 ft
Aircraft
B38M
Turbulence
moderate clear-air turbulence from 20,000 ft to 25,000 ft
A319 at 23,000 ft, 34 nm east, 10:21 pm CDT (03:21 UTC): moderate turbulence. At the destination end, 34 nm east of the line.
as filed, and in English
```
MJX UA /OV CYN345010/TM 0321/FL230/TP A319/TB MOD
```
Report
a routine report filed through MJX
Where
10 nm north (345°) of CYN
Time
03:21 UTC
Height
at 23,000 ft
Aircraft
A319
Turbulence
moderate
B712 descending, 15 nm southeast, 10:10 pm CDT (03:10 UTC): remarks: light rain light chop bases 50,000 ft ft. 1218 nm along the route, 15 nm southeast of the line.
as filed, and in English
```
BWI UA /OV RWY 15R/TM 0310/FLDURD/TP B712/RM LIGHT RAIN. LIGHT CHOP. BASES 500 FT
```
Report
a routine report filed through BWI
Where
runway 15R
Time
03:10 UTC
Height
during the descent
Aircraft
B712
Remarks
light rain light chop bases 50,000 ft ft
E145 at 600 ft, 44 nm north, 10:20 pm CDT (03:20 UTC): overcast above 600 ft. 1238 nm along the route, 44 nm north of the line.
as filed, and in English
```
MDT UA /OV MDT/TM 0320/FL006/TP E145/SK OVC 006
```
Report
a routine report filed through MDT
Where
over MDT
Time
03:20 UTC
Height
at 600 ft
Aircraft
E145
Sky
overcast from 600 ft

Winds aloft along the route, and the time en route the forecast for use 02:00–09:00 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 13 forecast points nearest it (SAT, CLL, SHV, LIT, MEM, HSV, BNA, TYS, TRI, CRW, EKN, RIC, ACY). 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	240° at 11 kt	−11 kt		131 kt	9 h 55 min	11:58 am EDT (15:58 UTC)
5,500 ft	270° at 10 kt	−10 kt	12 °C	130 kt	9 h 59 min	12:02 pm EDT (16:02 UTC)
7,500 ft	280° at 12 kt	−10 kt	13 °C	130 kt	9 h 59 min	12:02 pm EDT (16:02 UTC)
9,500 ft	280° at 13 kt	−10 kt	9 °C	130 kt	9 h 59 min	12:02 pm EDT (16:02 UTC)
11,500 ft	290° at 12 kt	−8 kt	6 °C	128 kt	10 h 08 min	12:11 pm EDT (16:11 UTC)
13,500 ft	300° at 13 kt	−8 kt	2 °C	128 kt	10 h 08 min	12:11 pm EDT (16:11 UTC)
15,500 ft	300° at 15 kt	−9 kt	-1 °C	129 kt	10 h 04 min	12:07 pm EDT (16:07 UTC)
17,500 ft	300° at 16 kt	−9 kt	-5 °C	129 kt	10 h 04 min	12:07 pm EDT (16:07 UTC)
18,000 ft FL180	300° at 16 kt	−10 kt	-6 °C	130 kt	9 h 59 min	12:02 pm EDT (16:02 UTC)
24,000 ft FL240	290° at 20 kt	−12 kt	-17 °C	132 kt	9 h 50 min	11:53 am EDT (15:53 UTC)
30,000 ft FL300	300° at 32 kt	−18 kt	-32 °C	138 kt	9 h 24 min	11:27 am EDT (15:27 UTC)
34,000 ft FL340	290° at 37 kt	−23 kt	-40 °C	143 kt	9 h 05 min	11:08 am EDT (15:08 UTC)
39,000 ft FL390	300° at 35 kt	−16 kt	-50 °C	136 kt	9 h 33 min	11:36 am EDT (15:36 UTC)

Based on data from the 12th at 00:00 UTC; valid on the 12th at 06:00 UTC for use 02:00 to 09:00 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
SAT	used from 0 nm out; 25 nm from the line	150/26	180/18 19°	180/18 14°	200/14 9°	230/16 -6°	210/9 -13°	270/8 -29°	280/6 -39°	340/19 -51°
CLL	used from 50 nm out; 52 nm from the line	170/22	170/26 18°	200/15 14°	240/13 8°	240/15 -5°	260/17 -13°	290/27 -29°	290/22 -40°	320/30 -51°
SHV	used from 200 nm out; 72 nm from the line	200/18	230/24 18°	230/24 12°	240/14 8°	260/12 -4°	240/11 -15°	300/31 -29°	300/32 -40°	300/36 -52°
LIT	used from 399 nm out; 88 nm from the line	220/21	230/17 16°	250/24 12°	260/15 7°	260/13 -5°	280/25 -16°	290/35 -30°	300/42 -40°	300/40 -52°
MEM	used from 449 nm out; 81 nm from the line	230/19	260/16 15°	270/17 12°	300/13 6°	300/15 -5°	300/26 -18°	300/34 -32°	300/41 -40°	310/46 -52°
HSV	used from 599 nm out; 67 nm from the line	310/20	330/20 16°	320/27 11°	340/23 5°	320/23 -7°	340/30 -17°	320/50 -33°	330/61 -41°	340/41 -50°
BNA	used from 649 nm out; 46 nm from the line	310/20	340/20 17°	330/24 10°	340/22 5°	330/26 -6°	340/29 -18°	330/52 -33°	320/62 -41°	340/45 -50°
TYS	used from 799 nm out; 53 nm from the line	320/20	340/18 11°	340/32 9°	340/36 4°	330/37 -7°	330/38 -19°	330/50 -34°	330/53 -38°	330/44 -48°
TRI	used from 849 nm out; 61 nm from the line		330/22 11°	330/29 7°	330/32 3°	330/36 -8°	320/34 -19°	320/36 -34°	320/43 -39°	320/46 -47°
CRW	used from 949 nm out; 39 nm from the line	330/20	330/23 11°	340/25 8°	340/21 2°	340/33 -9°	340/41 -20°	330/42 -35°	320/44 -39°	320/43 -47°
EKN	used from 1049 nm out; 29 nm from the line		330/21 12°	330/25 7°	350/22 2°	330/24 -10°	310/27 -21°	320/33 -35°	290/31 -39°	290/34 -47°
RIC	used from 1148 nm out; 97 nm from the line	270/23	280/19 11°	270/18 8°	240/22 4°	230/39 -7°	220/55 -18°	220/75 -30°	230/83 -39°	230/64 -50°
ACY	used from 1198 nm out; 100 nm from the line	220/19	220/18 14°	210/36 9°	210/35 5°	220/36 -8°	240/49 -21°	220/90 -31°	230/103 -40°	230/81 -50°

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
SAT San Antonio, TX	departure	marginal VFR Sky: a broken layer at 2,300 feet	from the southeast (130°) at 9 knots	10+ mi	2,300 ft	809 ft	12:51 am CDT (05:51 UTC)
HYI Austin, TX	40 nm out, 2 nm southwest of the line, tower	VFR	from the south-southeast (150°) at 4 knots	10+ mi	none	594 ft	05:56 UTC
CLL College Station, TX	130 nm out, 10 nm south of the line, tower	VFR	from the south-southeast (150°) at 7 knots	10+ mi	none	320 ft	05:53 UTC
SHV Shreveport, LA	300 nm out, 14 nm northwest of the line, tower	VFR	from the south-southwest (210°) at 7 knots	10+ mi	none	257 ft	05:56 UTC
GLH Greenville, MS	449 nm out, 9 nm southeast of the line, tower	VFR	from the south-southwest (200°) at 9 knots	10+ mi	none	130 ft	05:53 UTC
TUP Tupelo, MS	569 nm out, 23 nm southeast of the line, tower	VFR	calm	8 mi	none	346 ft	05:53 UTC
MQY Smyrna, TN	719 nm out, 15 nm northwest of the line, tower	reported, no category	calm		200 ft	543 ft	05:56 UTC
BYL Williamsburg, KY	839 nm out, 4 nm northwest of the line	IFR Sky: a broken layer at 700 feet, overcast at 1,000 feet	calm	9 mi	700 ft	1,177 ft	05:55 UTC
LWB Lewisburg, WV	1029 nm out, 17 nm southeast of the line, tower	marginal VFR Sky: overcast at 1,900 feet	from the west (280°) at 6 knots	10+ mi	1,900 ft	2,301 ft	05:55 UTC
MRB Martinsburg, WV	1168 nm out, 22 nm north of the line, tower	marginal VFR Sky: a broken layer at 1,300 feet, overcast at 4,100 feet Weather: light rain	from the north-northwest (330°) at 8 knots	10+ mi	1,300 ft	564 ft	05:53 UTC
JYO Leesburg, VA	1178 nm out, 4 nm southeast of the line, tower	IFR Sky: a broken layer at 600 feet, a broken layer at 1,900 feet, overcast at 4,600 feet Weather: rain	from the north-northwest (340°) at 4 knots	5 mi	600 ft	389 ft	05:55 UTC
PHL Philadelphia, PA	destination	marginal VFR Sky: a broken layer at 1,000 feet, overcast at 1,500 feet Weather: light rain, mist	from the northeast (050°) at 10 knots	5 mi	1,000 ft	35 ft	1:54 am EDT (05:54 UTC)

The highest airport on this list sits at 2,301 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At PHL when you get there the forecast at the estimated arrival, 11:08 am EDT (15:08 UTC)

Wind from the north at 10 knots, gusting to 15, visibility 6 miles, mist, a broken layer at 2,500 feet marginal VFR

The whole forecast for PHL

From Mon 2:00 am EDT (06:00 UTC): wind from the north-northeast at 8 knots, visibility 5 miles, light rain showers, mist, thunderstorms nearby, overcast at 700 feet (thunderheads)
From Mon 7:00 am EDT (11:00 UTC): wind from the north at 10 knots, visibility 5 miles, mist, overcast at 800 feet
From Mon 10:00 am EDT (14:00 UTC): wind from the north at 10 knots, gusting to 15, visibility 6 miles, mist, a broken layer at 2,500 feet
From Mon 12:00 pm EDT (16:00 UTC): wind from the north-northwest at 10 knots, gusting to 15, visibility more than 6 miles, scattered clouds at 5,000 feet
From Mon 6:00 pm EDT (22:00 UTC): wind from the northwest at 8 knots, visibility more than 6 miles, scattered clouds at 25,000 feet
From Mon 9:00 pm EDT (01:00 UTC): wind light and variable, visibility more than 6 miles, a few clouds at 25,000 feet

The forecast for SAT, the departure

From Mon 1:00 am CDT (06:00 UTC): wind from the southeast at 8 knots, visibility more than 6 miles, a few clouds at 1,500 feet, a few clouds at 25,000 feet
From Mon 5:00 am CDT (10:00 UTC): wind from the southeast at 6 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

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

6/8600 Sterling, VA, Monday, October 12, 2026 through Monday, October 12, 2026 Local 4 nm from the route, 1188 nm along the route · a VIP movement · today · ZDC
4/9383 WASHINGTON, DC., USA 10 nm from the route, 1198 nm along the route · security · ZDC
6/8800 Baltimore, MD, Saturday, October 17, 2026 through Sunday, October 18, 2026 UTC 9 nm from the route, 1228 nm along the route · drones kept away from a public gathering · starts Saturday 17 October · ZDC

Daylight

Sunset at SAT 7:05 pm CDT (00:05 UTC), at PHL 6:26 pm EDT (22:26 UTC) (civil twilight ends 6:53 pm EDT (22:53 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 lower Mississippi valley · loop National Weather Service

Radar now, the central Great Lakes · 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: San Antonio International, Philadelphia International.