San Antonio International to Baltimore/Washington International Thurgood Marshall SAT → BWI
1,221 nautical miles (1,405 statute miles) northeast on a straight line, true course 056°, about 052° magnetic at the departure end (variation 4E). At 120 knots that is 8 h 51 min at the quickest height in today's winds (34,000 ft, a 18-knot tailwind), arriving about 11:06 am EDT (15:06 UTC). Right now SAT is marginal VFR, wind from the southeast (130°) at 9 knots; BWI is IFR, wind from the north (010°) at 8 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: 1,440 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 546 nm of the route.
- AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 804 to 1132 nm out.
- AIRMET TANGO 5W: moderate turbulence above 18,000 ft (due to mountain wave) from 29,000 ft to 40,000 ft. Near the route, 943 nm along the route.
- AIRMET TANGO 5W: moderate turbulence below 18,000 ft (due to mountain wave) up to 10,000 ft. Over the route from 1013 to 1102 nm out.
- AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the last 119 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, 15 nm northwest, 10:11 pm CDT (03:11 UTC): moderate clear-air turbulence from 20,000 ft to 25,000 ft. 1172 nm along the route, 15 nm northwest 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
- B738 descending, 43 nm south, 10:15 pm CDT (03:15 UTC): remarks: multiple layers from from 5,200 ft to 4,700 ft overcast at at 2,300 ft. 824 nm along the route, 43 nm south of the line.
as filed, and in English
TYS UA /OV KTYS/TM 0315/FLDURD/TP B738/RM MULTIPLE LAYERS FROM 052-047 OVC AT 023
- Report
- a routine report filed through TYS
- Where
- over KTYS
- Time
- 03:15 UTC
- Height
- during the descent
- Aircraft
- B738
- Remarks
- multiple layers from from 5,200 ft to 4,700 ft overcast at at 2,300 ft
- B712 descending, 0 nm south, 10:10 pm CDT (03:10 UTC): remarks: light rain light chop bases 50,000 ft ft. At the destination end, 0 nm south 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
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, JAN, MEM, HSV, BNA, TYS, TRI, CRW, ROA, EKN, RIC). 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 | 250° at 10 kt | −11 kt | 131 kt | 9 h 19 min | 11:34 am EDT (15:34 UTC) | |
| 5,500 ft | 280° at 11 kt | −9 kt | 12 °C | 129 kt | 9 h 28 min | 11:43 am EDT (15:43 UTC) |
| 7,500 ft | 290° at 12 kt | −9 kt | 13 °C | 129 kt | 9 h 28 min | 11:43 am EDT (15:43 UTC) |
| 9,500 ft | 300° at 14 kt | −9 kt | 10 °C | 129 kt | 9 h 28 min | 11:43 am EDT (15:43 UTC) |
| 11,500 ft | 310° at 14 kt | −6 kt | 6 °C | 126 kt | 9 h 41 min | 11:56 am EDT (15:56 UTC) |
| 13,500 ft | 310° at 14 kt | −7 kt | 2 °C | 127 kt | 9 h 37 min | 11:52 am EDT (15:52 UTC) |
| 15,500 ft | 300° at 16 kt | −8 kt | -1 °C | 128 kt | 9 h 32 min | 11:47 am EDT (15:47 UTC) |
| 17,500 ft | 300° at 17 kt | −9 kt | -5 °C | 129 kt | 9 h 28 min | 11:43 am EDT (15:43 UTC) |
| 18,000 ft FL180 | 300° at 17 kt | −9 kt | -6 °C | 129 kt | 9 h 28 min | 11:43 am EDT (15:43 UTC) |
| 24,000 ft FL240 | 300° at 20 kt | −11 kt | -17 °C | 131 kt | 9 h 19 min | 11:34 am EDT (15:34 UTC) |
| 30,000 ft FL300 | 300° at 32 kt | −15 kt | -32 °C | 135 kt | 9 h 03 min | 11:18 am EDT (15:18 UTC) |
| 34,000 ft FL340 | 300° at 36 kt | −18 kt | -40 °C | 138 kt | 8 h 51 min | 11:06 am EDT (15:06 UTC) |
| 39,000 ft FL390 | 310° at 35 kt | −13 kt | -50 °C | 133 kt | 9 h 11 min | 11:26 am EDT (15:26 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 199 nm out; 74 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° |
| JAN | used from 397 nm out; 93 nm from the line | 230/10 | 270/13 18° | 270/11 12° | 310/11 6° | 300/15 -4° | 300/22 -16° | 310/33 -31° | 320/37 -41° | 330/41 -52° |
| MEM | used from 447 nm out; 87 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 596 nm out; 64 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 695 nm out; 34 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 794 nm out; 43 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 844 nm out; 56 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 943 nm out; 52 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° |
| ROA | used from 993 nm out; 46 nm from the line | 310/29 | 330/31 13° | 340/28 7° | 330/25 3° | 310/32 -8° | 300/32 -22° | 290/32 -31° | 270/35 -38° | 270/32 -47° |
| EKN | used from 1043 nm out; 43 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 1142 nm out; 82 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° |
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, 1 nm southwest of the line, tower | VFR | from the south-southeast (160°) at 4 knots | 10+ mi | none | 594 ft | 04:56 UTC |
| CLL College Station, TX | 129 nm out, 8 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 | 298 nm out, 17 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 | 447 nm out, 5 nm east of the line, tower | VFR | from the south (180°) at 8 knots | 10+ mi | none | 130 ft | 04:53 UTC |
| TUP Tupelo, MS | 566 nm out, 17 nm southeast of the line, tower | VFR | calm | 8 mi | none | 346 ft | 05:53 UTC |
| MQY Smyrna, TN | 715 nm out, 23 nm northwest of the line, tower | reported, no category | calm | 200 ft | 543 ft | 05:53 UTC | |
| SRB Sparta, TN | 765 nm out, 5 nm west of the line | low IFR Sky: overcast at 200 feet Weather: fog | calm | 0.25 mi | 200 ft | 1,025 ft | 05:35 UTC |
| LNP Wise, VA | 913 nm out, 10 nm southeast of the line | low IFR Sky: overcast at 400 feet Weather: mist | from the west-northwest (290°) at 9 knots | 4 mi | 400 ft | 2,684 ft | 05:35 UTC |
| LWB Lewisburg, WV | 1033 nm out, 6 nm south of the line, tower | marginal VFR Sky: a few clouds at 900 feet, a broken layer at 2,100 feet, overcast at 2,500 feet Weather: light rain, mist | from the west-southwest (240°) at 7 knots | 4 mi | 2,100 ft | 2,301 ft | 02:15 UTC |
| IAD Washington, DC | 1182 nm out, 1 nm north of the line, tower | IFR Sky: a broken layer at 800 feet, overcast at 1,800 feet Weather: light rain, mist | from the north (350°) at 15 knots, gusting to 27 | 4 mi | 800 ft | 312 ft | 05:52 UTC |
| BWI Baltimore, MD | destination | IFR Sky: overcast at 600 feet Weather: mist | from the north (010°) at 8 knots | 5 mi | 600 ft | 143 ft | 1:43 am EDT (05:43 UTC) |
The highest airport on this list sits at 2,684 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At BWI when you get there the forecast at the estimated arrival, 11:06 am EDT (15:06 UTC)
Wind from the north-northwest at 12 knots, gusting to 20, visibility more than 6 miles, overcast at 1,400 feet marginal VFR
The whole forecast for BWI
- From Mon 2:00 am EDT (06:00 UTC): wind from the north at 9 knots, gusting to 16, visibility 5 miles, light rain, mist, a broken layer at 800 feet, overcast at 1,300 feet
- From Mon 10:00 am EDT (14:00 UTC): wind from the north-northwest at 12 knots, gusting to 20, visibility more than 6 miles, overcast at 1,400 feet
- From Mon 1:00 pm EDT (17:00 UTC): wind from the northwest at 10 knots, gusting to 18, visibility more than 6 miles, scattered clouds at 1,500 feet, overcast at 2,500 feet
- From Mon 4:00 pm EDT (20:00 UTC): wind from the west-northwest at 9 knots, visibility more than 6 miles, scattered clouds at 2,500 feet, a broken layer at 3,500 feet
- From Mon 8:00 pm EDT (00:00 UTC): wind from the west at 5 knots, visibility more than 6 miles, scattered clouds at 4,000 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
- 4/9383 WASHINGTON, DC., USA on the route, at the destination end · security · ZDC
- 6/8600 Sterling, VA, Monday, October 12, 2026 through Monday, October 12, 2026 Local 0 nm from the route, at the destination end · a VIP movement · today · ZDC
- 6/8800 Baltimore, MD, Saturday, October 17, 2026 through Sunday, October 18, 2026 UTC 6 nm from the route, at the destination end · drones kept away from a public gathering · starts Saturday 17 October · ZDC
Daylight
Sunset at SAT 7:05 pm CDT (00:05 UTC), at BWI 6:32 pm EDT (22:32 UTC) (civil twilight ends 6:59 pm EDT (22:59 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
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, Baltimore/Washington International Thurgood Marshall.