Harrisburg International to San Antonio International MDT → SAT
1,241 nautical miles (1,428 statute miles) southwest on a straight line, true course 246°, about 257° magnetic at the departure end (variation 11W). At 120 knots that is 10 h 47 min at the quickest height in today's winds (12,500 ft, a 5-knot headwind), arriving about 11:46 am CDT (16:46 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
- 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 556 nm of the route.
- AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the first 109 nm of the route.
- AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 30 to 348 nm out.
- AIRMET TANGO 5W: moderate turbulence below 18,000 ft (due to mountain wave) up to 10,000 ft. Near the route, 179 nm along 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 MDT.
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 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 11 forecast points nearest it (PSB, EKN, CRW, TRI, TYS, 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 | 270° at 8 kt | +8 kt | 12 °C | 112 kt | 11 h 05 min | 12:04 pm CDT (17:04 UTC) |
| 6,500 ft | 280° at 10 kt | +8 kt | 14 °C | 112 kt | 11 h 05 min | 12:04 pm CDT (17:04 UTC) |
| 8,500 ft | 290° at 13 kt | +9 kt | 11 °C | 111 kt | 11 h 11 min | 12:10 pm CDT (17:10 UTC) |
| 10,500 ft | 300° at 13 kt | +7 kt | 8 °C | 113 kt | 10 h 59 min | 11:58 am CDT (16:58 UTC) |
| 12,500 ft | 310° at 13 kt | +5 kt | 4 °C | 115 kt | 10 h 47 min | 11:46 am CDT (16:46 UTC) |
| 14,500 ft | 310° at 14 kt | +5 kt | 0 °C | 115 kt | 10 h 47 min | 11:46 am CDT (16:46 UTC) |
| 16,500 ft | 310° at 16 kt | +6 kt | -4 °C | 114 kt | 10 h 53 min | 11:52 am CDT (16:52 UTC) |
| 18,000 ft FL180 | 310° at 16 kt | +6 kt | -7 °C | 114 kt | 10 h 53 min | 11:52 am CDT (16:52 UTC) |
| 24,000 ft FL240 | 310° at 20 kt | +8 kt | -18 °C | 112 kt | 11 h 05 min | 12:04 pm CDT (17:04 UTC) |
| 30,000 ft FL300 | 310° at 33 kt | +11 kt | -32 °C | 109 kt | 11 h 23 min | 12:22 pm CDT (17:22 UTC) |
| 34,000 ft FL340 | 300° at 36 kt | +15 kt | -40 °C | 105 kt | 11 h 49 min | 12:48 pm CDT (17:48 UTC) |
| 39,000 ft FL390 | 310° at 36 kt | +12 kt | -50 °C | 108 kt | 11 h 29 min | 12:28 pm CDT (17:28 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| PSB | used from 0 nm out; 64 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° | |
| EKN | used from 99 nm out; 40 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° | |
| CRW | used from 199 nm out; 26 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° |
| TRI | used from 348 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° | |
| TYS | used from 397 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° |
| BNA | used from 447 nm out; 56 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° |
| MEM | used from 596 nm out; 83 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° |
| LIT | used from 794 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° |
| SHV | used from 844 nm out; 76 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° |
| CLL | used from 1043 nm out; 50 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° |
| SAT | used from 1192 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° |
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 |
|---|---|---|---|---|---|---|---|
| MDT Harrisburg, PA | departure | no report just now | 310 ft | ||||
| HGR Hagerstown, MD | 50 nm out, 8 nm south of the line, tower | no report just now | 703 ft | ||||
| CRW Charleston, WV | 248 nm out, 1 nm southwest of the line, tower | no report just now | 947 ft | ||||
| HTS Huntington, WV | 288 nm out, 20 nm northwest of the line, tower | no report just now | 828 ft | ||||
| SME Somerset, KY | 417 nm out, 4 nm east of the line | no report just now | 927 ft | ||||
| BNA Nashville, TN | 526 nm out, 2 nm south of the line, tower | no report just now | 599 ft | ||||
| OLV Olive Branch, MS | 695 nm out, 19 nm northwest of the line, tower | no report just now | 401 ft | ||||
| GLH Greenville, MS | 794 nm out, 25 nm southeast of the line, tower | no report just now | 130 ft | ||||
| SHV Shreveport, LA | 943 nm out, 3 nm west of the line, tower | no report just now | 257 ft | ||||
| CLL College Station, TX | 1112 nm out, 14 nm south of the line, tower | no report just now | 320 ft | ||||
| HYI Austin, TX | 1201 nm out, 2 nm south of the line, tower | no report just now | 594 ft | ||||
| SAT San Antonio, TX | destination | no report just now | 809 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 SAT when you get there the forecast at the estimated arrival, 11:46 am CDT (16:46 UTC)
SAT 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, 516 nm along the route · security · until 1 August · ZME
Daylight
Sunset at MDT 6:32 pm EDT (22:32 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
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: Harrisburg International, San Antonio International.