Plan a flight · Mon 6:33 am CDT (11:33 UTC)

San Antonio International to General Edward Lawrence Logan International SAT → BOS

1,531 nautical miles (1,762 statute miles) northeast on a straight line, true course 052°, about 048° magnetic at the departure end (variation 4E). At 120 knots that is 11 h 31 min at the quickest height in today's winds (34,000 ft, a 13-knot tailwind), arriving about 7:04 pm EDT (23:04 UTC), after sunset at the destination. Right now SAT is marginal VFR, wind from the east-southeast (120°) at 5 knots; BOS is IFR, wind from the north (360°) at 7 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: 696 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 825 nm of the route.
AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, mist). Over the route from 915 to 1282 nm out.
AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 24,000 ft to 33,000 ft. Over the last 467 nm of the route.
AIRMET TANGO 3W: moderate turbulence below 18,000 ft (due to mountain wave) up to 6,000 ft. Over the route from 1103 to 1203 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 SAT.

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

urgent SF50 descending, 29 nm southeast, 5:50 am CDT (10:50 UTC): light turbulence, overcast above 1,200 ft, remarks: during the descent runway 5. 1352 nm along the route, 29 nm southeast of the line.
as filed, and in English
```
MMU UUA /OV MMU/TM 1050/FLDURD/TP SF50/SK OVC012/TB LGT/RM DURD RWY 5
```
Report
an urgent report filed through MMU
Where
over MMU
Time
10:50 UTC
Height
during the descent
Aircraft
SF50
Sky
overcast from 1,200 ft
Turbulence
light
Remarks
during the descent runway 5
A320 at 21,000 ft, 38 nm southeast, 5:45 am CDT (10:45 UTC): moderate chop turbulence, remarks: zhu. At the departure end, 38 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
A321 at 32,000 ft, 3 nm west, 4:48 am CDT (09:48 UTC): moderate chop turbulence. 1024 nm along the route, 3 nm west of the line.
as filed, and in English
```
CRW UA /OV HVQ045040/TM 0948/FL320/TP A321/TB OCNL MOD CHOP
```
Report
a routine report filed through CRW
Where
40 nm northeast (045°) of HVQ
Time
09:48 UTC
Height
at 32,000 ft
Aircraft
A321
Turbulence
occasional moderate chop
BCS3 at 10,000 ft, 1 nm southeast, 5:15 am CDT (10:15 UTC): moderate turbulence from 7,000 ft to 9,000 ft, remarks: during the climb ssoxs aid. At the destination end, 1 nm southeast of the line.
as filed, and in English
```
BOS UA /OV BOS/TM 1015/FL100/TP BCS3/TB MOD 070-090/RM DURC SSOXS AID
```
Report
a routine report filed through BOS
Where
over BOS
Time
10:15 UTC
Height
at 10,000 ft
Aircraft
BCS3
Turbulence
moderate from 7,000 ft to 9,000 ft
Remarks
during the climb ssoxs aid
A321 at 9,500 ft, 9 nm northwest, 4:05 am CDT (09:05 UTC): moderate turbulence, remarks: moderate turbulence during the descent jfund arrival from from 9,500 ft to 7,000 ft, smooth below. At the destination end, 9 nm northwest of the line.
as filed, and in English
```
BOS UA /OV BOS350010/TM 0905/FL095/TP A321/TB MOD/RM MOD TB DURD JFUND ARR FROM 095-070, SMOOTH BELOW
```
Report
a routine report filed through BOS
Where
10 nm north (350°) of BOS
Time
09:05 UTC
Height
at 9,500 ft
Aircraft
A321
Turbulence
moderate
Remarks
moderate turbulence during the descent jfund arrival from from 9,500 ft to 7,000 ft, smooth below
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 departure 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 departure 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
B738 at 38,000 ft, 7 nm northwest, 6:22 am CDT (11:22 UTC): no turbulence, remarks: zhu. At the departure end, 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. At the departure end, 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
E75L at 33,000 ft, 3 nm southwest, 6:09 am CDT (11:09 UTC): no turbulence, remarks: ZME62. 756 nm along the route, 3 nm southwest 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
E170 at 100 ft, 37 nm northwest, 5:11 am CDT (10:11 UTC): remarks: in the clouds on rotation. 855 nm along the route, 37 nm northwest of the line.
as filed, and in English
```
LEX UA /OV LEX/TM 1011/FL001/TP E170/SK VV001-TOP013/RM IN THE CLOUDS ON ROTATION
```
Report
a routine report filed through LEX
Where
over LEX
Time
10:11 UTC
Height
at 100 ft
Aircraft
E170
Sky
sky obscured from 100 ft, tops 1,300 ft
Remarks
in the clouds on rotation
E170 at 1,100 ft, 37 nm northwest, 5:11 am CDT (10:11 UTC): overcast from 1,100 ft to 1,300 ft, remarks: cig VV001/IN clouds on rotation cor. 855 nm along the route, 37 nm northwest of the line.
as filed, and in English
```
LEX UA /OV LEX /TM 1011 /FL011 /TP E170 /SK OVC011-TOP013 /RM CIG VV001/IN CLOUDS ON ROTATION -COR
```
Report
a routine report filed through LEX
Where
over LEX
Time
10:11 UTC
Height
at 1,100 ft
Aircraft
E170
Sky
overcast from 1,100 ft, tops 1,300 ft
Remarks
cig VV001/IN clouds on rotation cor
CRJ7 at 5,000 ft, 40 nm northwest, 4:37 am CDT (09:37 UTC): scattered clouds above 10,000 ft, remarks: during the climb. 865 nm along the route, 40 nm northwest of the line.
as filed, and in English
```
LEX UA /OV HYK330010/TM 0937/FL050/TP CRJ7/SK SCT001/RM DURC
```
Report
a routine report filed through LEX
Where
10 nm northwest (330°) of HYK
Time
09:37 UTC
Height
at 5,000 ft
Aircraft
CRJ7
Sky
scattered clouds from 100 ft
Remarks
during the climb
B350 climbing, 15 nm south, 6:12 am CDT (11:12 UTC): a routine report with nothing remarked on. 994 nm along the route, 15 nm south of the line.
as filed, and in English
```
CRW UA /OV CRW/TM 1112/FLDURC/TP B350/SK TOP050
```
Report
a routine report filed through CRW
Where
over CRW
Time
11:12 UTC
Height
during the climb
Aircraft
B350
Sky
TOP050

16 more routine reports are on the map.

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 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 14 forecast points nearest it (SAT, CLL, SHV, LIT, MEM, BNA, LOU, CRW, EKN, PSB, AVP, JFK, BDL, BOS). 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	270° at 8 kt	−8 kt		128 kt	11 h 58 min	7:31 pm EDT (23:31 UTC)
5,500 ft	290° at 8 kt	−5 kt	11 °C	125 kt	12 h 15 min	7:48 pm EDT (23:48 UTC)
7,500 ft	300° at 10 kt	−5 kt	12 °C	125 kt	12 h 15 min	7:48 pm EDT (23:48 UTC)
9,500 ft	310° at 12 kt	−6 kt	9 °C	126 kt	12 h 09 min	7:42 pm EDT (23:42 UTC)
11,500 ft	310° at 13 kt	−6 kt	6 °C	126 kt	12 h 09 min	7:42 pm EDT (23:42 UTC)
13,500 ft	300° at 15 kt	−7 kt	2 °C	127 kt	12 h 03 min	7:36 pm EDT (23:36 UTC)
15,500 ft	300° at 17 kt	−9 kt	-2 °C	129 kt	11 h 52 min	7:25 pm EDT (23:25 UTC)
17,500 ft	300° at 19 kt	−10 kt	-6 °C	130 kt	11 h 47 min	7:20 pm EDT (23:20 UTC)
18,000 ft FL180	300° at 20 kt	−10 kt	-7 °C	130 kt	11 h 47 min	7:20 pm EDT (23:20 UTC)
24,000 ft FL240	300° at 22 kt	−12 kt	-18 °C	132 kt	11 h 36 min	7:09 pm EDT (23:09 UTC)
30,000 ft FL300	310° at 33 kt	−12 kt	-33 °C	132 kt	11 h 36 min	7:09 pm EDT (23:09 UTC)
34,000 ft FL340	310° at 40 kt	−13 kt	-41 °C	133 kt	11 h 31 min	7:04 pm EDT (23:04 UTC)
39,000 ft FL390	310° at 36 kt	−11 kt	-51 °C	131 kt	11 h 41 min	7:14 pm EDT (23:14 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
SAT	used from 0 nm out; 25 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°
CLL	used from 50 nm out; 53 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°
SHV	used from 199 nm out; 72 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°
LIT	used from 398 nm out; 68 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°
MEM	used from 497 nm out; 28 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°
BNA	used from 646 nm out; 44 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°
LOU	used from 795 nm out; 72 nm from the line	300/16	310/19 15°	310/17 9°	300/15 4°	300/26 -6°	280/34 -19°	290/30 -34°	310/49 -42°	310/58 -51°
CRW	used from 895 nm out; 73 nm from the line	320/17	340/23 12°	340/32 8°	340/35 4°	330/40 -7°	340/45 -20°	340/57 -34°	340/64 -42°	320/38 -50°
EKN	used from 1044 nm out; 27 nm from the line		330/20 10°	350/29 7°	340/32 2°	340/44 -8°	350/50 -21°	350/63 -35°	340/69 -40°	330/42 -50°
PSB	used from 1143 nm out; 58 nm from the line		020/21 12°	360/28 7°	360/29 1°	350/33 -10°	350/42 -22°	350/49 -37°	340/63 -43°	350/39 -52°
AVP	used from 1243 nm out; 52 nm from the line	010/20	020/24 11°	360/19 8°	350/23 2°	320/24 -11°	330/25 -22°	330/27 -37°	310/28 -42°	290/30 -50°
JFK	used from 1342 nm out; 50 nm from the line	020/25	290/9 12°	300/12 7°	320/14 3°	290/17 -10°	240/27 -21°	240/44 -36°	240/53 -41°	240/51 -50°
BDL	used from 1392 nm out; 36 nm from the line	020/15	010/19 10°	340/10 7°	300/17 3°	280/23 -10°	250/35 -22°	250/44 -38°	250/55 -42°	250/57 -51°
BOS	used from 1491 nm out; 20 nm from the line	020/10	360/20 10°	340/19 7°	290/21 2°	270/35 -9°	260/42 -22°	250/55 -38°	240/75 -43°	250/72 -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
SAT San Antonio, TX	departure	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)
HYI Austin, TX	40 nm out, 3 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
SHV Shreveport, LA	298 nm out, 3 nm south of the line, tower	VFR	from the south-southeast (160°) at 5 knots	10+ mi	none	257 ft	10:56 UTC
LLQ Monticello, AR	427 nm out, 5 nm southwest of the line	VFR	from the west-southwest (250°) at 5 knots	10+ mi	none	267 ft	10:53 UTC
OLV Olive Branch, MS	547 nm out, 11 nm northwest of the line, tower	reported, no category	from the south (180°) at 5 knots	10+ mi	none	401 ft	11:15 UTC
JWN Nashville, TN	706 nm out, 3 nm southeast of the line, tower	low IFR Sky: overcast at 200 feet Weather: fog	calm	0.25 mi	200 ft	501 ft	11:15 UTC
TZV Tompkinsville, KY	775 nm out, 6 nm southeast of the line	no report just now				1,036 ft
HTS Huntington, WV	954 nm out, 7 nm northwest of the line, tower	marginal VFR Sky: a broken layer at 1,400 feet, overcast at 1,900 feet	from the west-northwest (300°) at 7 knots	10+ mi	1,400 ft	828 ft	11:18 UTC
CKB Clarksburg, WV	1074 nm out, 5 nm northwest of the line, tower	IFR Sky: a broken layer at 900 feet, overcast at 1,200 feet	from the west-northwest (290°) at 3 knots	8 mi	900 ft	1,223 ft	10:53 UTC
CXY Harrisburg, PA	1243 nm out, 15 nm south of the line, tower	marginal VFR Sky: a broken layer at 1,500 feet, overcast at 2,000 feet	from the northwest (310°) at 8 knots	10+ mi	1,500 ft	346 ft	11:17 UTC
BDL Windsor Locks, CT	1451 nm out, 4 nm north of the line, tower	marginal VFR Sky: a few clouds at 700 feet, a broken layer at 1,500 feet, overcast at 3,000 feet	from the north (010°) at 9 knots	10+ mi	1,500 ft	173 ft	11:17 UTC
BOS Boston, MA	destination	IFR Sky: overcast at 700 feet	from the north (360°) at 7 knots	10+ mi	700 ft	19 ft	6:54 am EDT (10:54 UTC)

The highest airport on this list sits at 1,223 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At BOS when you get there the forecast at the estimated arrival, 7:04 pm EDT (23:04 UTC)

Wind from the north at 5 knots, visibility more than 6 miles, scattered clouds at 4,000 feet VFR

The whole forecast for BOS

From Mon 8:00 am EDT (12:00 UTC): wind from the north at 9 knots, visibility 6 miles, mist, overcast at 600 feet
From Mon 10:00 am EDT (14:00 UTC): wind from the north at 9 knots, visibility more than 6 miles, overcast at 1,500 feet
From Mon 1:00 pm EDT (17:00 UTC): wind from the north at 5 knots, visibility more than 6 miles, scattered clouds at 4,000 feet
At times between Mon 1:00 pm EDT (17:00 UTC) and 3:00 pm EDT (19:00 UTC): a broken layer at 3,000 feet
From Tue 12:00 am EDT (04:00 UTC): wind from the northeast at 10 knots, visibility more than 6 miles, overcast at 3,000 feet
From Tue 6:00 am EDT (10:00 UTC): wind from the east-northeast at 10 knots, visibility more than 6 miles, light rain, overcast at 800 feet

The forecast for SAT, the departure

From Mon 7:00 am CDT (12:00 UTC): wind from the east-southeast at 5 knots, visibility more than 6 miles, a broken layer at 1,500 feet
At times between Mon 8:00 am CDT (13:00 UTC) and 11:00 am CDT (16:00 UTC): a broken layer at 2,500 feet
From Mon 12:00 pm CDT (17:00 UTC): wind from the south-southeast at 12 knots, visibility more than 6 miles, a broken layer at 3,500 feet
From Tue 1:00 am CDT (06:00 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

6/0708 Goodlettsville, TN, Saturday, August 1, 2026 through Sunday, August 1, 2027 UTC 3 nm from the route, 716 nm along the route · security · until 1 August · ZME
6/7153 North Sicuate, RI, Saturday, October 10, 2026 through Monday, October 12, 2026 UTC 17 nm from the route, at the destination end · drones kept away from a public gathering · until 12 October · ZBW
6/8802 Foxborough, MA, Saturday, October 17, 2026 through Sunday, October 18, 2026 UTC 11 nm from the route, at the destination end · drones kept away from a public gathering · starts Saturday 17 October · ZBW

Daylight

Sunset at SAT 7:05 pm CDT (00:05 UTC), at BOS 6:07 pm EDT (22:07 UTC) (civil twilight ends 6:35 pm EDT (22:35 UTC)). At 120 knots the arrival at BOS is after sunset there (6:07 pm EDT (22:07 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, General Edward Lawrence Logan International.