San Antonio International to Harrisburg International SAT → MDT
1,241 nautical miles (1,428 statute miles) northeast on a straight line, true course 053°, about 049° magnetic at the departure end (variation 4E). At 120 knots that is 9 h 12 min at the quickest height in today's winds (34,000 ft, a 15-knot tailwind), arriving about 11:55 am EDT (15:55 UTC). 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: 2 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
- SIGMET E22E: thunderstorms (a convective SIGMET) up to 40,000 ft, moving from the southwest at 20 knots, until 2:55 am CDT (07:55 UTC). Over the route from 1162 to 1182 nm out.
as issued
WSUS31 KKCI 120555 MKCE WST 120555 CONVECTIVE SIGMET 22E VALID UNTIL 0755Z NY NJ PA DE MD VA DC WV AND MA RI DE NJ NY CSTL WTRS FROM 40E HTO-80SSW ACK-100ESE SIE-30SW CSN-40SSE JST-40E HTO AREA EMBD TS MOV FROM 24020KT. TOPS TO FL400.
- 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 556 nm of the route.
- AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 894 to 1211 nm out.
- AIRMET TANGO 5W: moderate turbulence below 18,000 ft (due to mountain wave) up to 10,000 ft. Near the route, 1062 nm along the route.
- AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the last 109 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
Not fetched just now.
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 11 forecast points nearest it (SAT, CLL, SHV, LIT, MEM, BNA, TYS, TRI, CRW, EKN, PSB). 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 10 kt | −11 kt | 131 kt | 9 h 28 min | 12:11 pm EDT (16:11 UTC) | |
| 5,500 ft | 280° at 9 kt | −8 kt | 12 °C | 128 kt | 9 h 42 min | 12:25 pm EDT (16:25 UTC) |
| 7,500 ft | 290° at 11 kt | −8 kt | 13 °C | 128 kt | 9 h 42 min | 12:25 pm EDT (16:25 UTC) |
| 9,500 ft | 290° at 13 kt | −8 kt | 9 °C | 128 kt | 9 h 42 min | 12:25 pm EDT (16:25 UTC) |
| 11,500 ft | 310° at 13 kt | −5 kt | 6 °C | 125 kt | 9 h 56 min | 12:39 pm EDT (16:39 UTC) |
| 13,500 ft | 310° at 14 kt | −5 kt | 2 °C | 125 kt | 9 h 56 min | 12:39 pm EDT (16:39 UTC) |
| 15,500 ft | 310° at 15 kt | −5 kt | -1 °C | 125 kt | 9 h 56 min | 12:39 pm EDT (16:39 UTC) |
| 17,500 ft | 310° at 16 kt | −6 kt | -6 °C | 126 kt | 9 h 51 min | 12:34 pm EDT (16:34 UTC) |
| 18,000 ft FL180 | 310° at 16 kt | −6 kt | -7 °C | 126 kt | 9 h 51 min | 12:34 pm EDT (16:34 UTC) |
| 24,000 ft FL240 | 310° at 20 kt | −8 kt | -18 °C | 128 kt | 9 h 42 min | 12:25 pm EDT (16:25 UTC) |
| 30,000 ft FL300 | 310° at 33 kt | −10 kt | -32 °C | 130 kt | 9 h 33 min | 12:16 pm EDT (16:16 UTC) |
| 34,000 ft FL340 | 300° at 36 kt | −15 kt | -40 °C | 135 kt | 9 h 12 min | 11:55 am EDT (15:55 UTC) |
| 39,000 ft FL390 | 310° at 36 kt | −11 kt | -50 °C | 131 kt | 9 h 28 min | 12:11 pm EDT (16:11 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; 53 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; 73 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 397 nm out; 74 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 447 nm out; 76 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° |
| BNA | used from 645 nm out; 43 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; 82 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; 91 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 894 nm out; 73 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 1043 nm out; 14 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° | |
| PSB | used from 1142 nm out; 73 nm from the line | 360/13 13° | 330/14 7° | 300/11 3° | 290/12 -11° | 240/23 -23° | 270/25 -36° | 250/34 -40° | 250/45 -48° |
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 | no report just now | 809 ft | ||||
| HYI Austin, TX | 40 nm out, 2 nm south of the line, tower | no report just now | 594 ft | ||||
| CLL College Station, TX | 129 nm out, 14 nm south of the line, tower | no report just now | 320 ft | ||||
| SHV Shreveport, LA | 298 nm out, 3 nm west of the line, tower | no report just now | 257 ft | ||||
| GLH Greenville, MS | 447 nm out, 25 nm southeast of the line, tower | no report just now | 130 ft | ||||
| OLV Olive Branch, MS | 546 nm out, 19 nm northwest of the line, tower | no report just now | 401 ft | ||||
| BNA Nashville, TN | 715 nm out, 2 nm south of the line, tower | no report just now | 599 ft | ||||
| SME Somerset, KY | 824 nm out, 4 nm east of the line | no report just now | 927 ft | ||||
| HTS Huntington, WV | 953 nm out, 20 nm northwest of the line, tower | no report just now | 828 ft | ||||
| CRW Charleston, WV | 993 nm out, 1 nm southwest of the line, tower | no report just now | 947 ft | ||||
| HGR Hagerstown, MD | 1192 nm out, 8 nm south of the line, tower | no report just now | 703 ft | ||||
| MDT Harrisburg, PA | destination | no report just now | 310 ft |
The highest airport on this list sits at 947 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At MDT when you get there the forecast at the estimated arrival, 11:55 am EDT (15:55 UTC)
MDT has no terminal forecast; use the nearest airport that does.
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 11 nm from the route, 725 nm along the route · security · until 1 August · ZME
Daylight
Sunset at SAT 7:05 pm CDT (00:05 UTC), at MDT 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, Harrisburg International.