San Antonio International to Portsmouth International AT Pease SAT → PSM
1,554 nautical miles (1,789 statute miles) northeast on a straight line, true course 051°, about 047° magnetic at the departure end (variation 4E). At 120 knots that is 10 h 17 min at the quickest height in today's winds (34,000 ft, a 31-knot tailwind), arriving about 7:18 am EDT (11:18 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: 1 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 TANGO 6W: moderate turbulence above 18,000 ft from 28,000 ft to 40,000 ft. Over the route from 717 to 717 nm out.
- 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 route from 817 to 1056 nm out.
- AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1006 to 1425 nm out.
- AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the last 478 nm of the route.
- 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 route from 1116 to 1485 nm out.
- AIRMET TANGO 2W: low-level wind shear (due to air speed loss or gain of 20 knots or more below 2,000 ft above the ground). Over the route from 1166 to 1355 nm out.
- AIRMET TANGO 2W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the last 369 nm of the route.
- AIRMET ZULU 1C: moderate icing up to 24,000 ft. Over the last 179 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 20:00–03:00 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 16 forecast points nearest it (SAT, CLL, SHV, LIT, MEM, BNA, LOU, CVG, CRW, EKN, AGC, PSB, AVP, ALB, 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 | 180° at 6 kt | −3 kt | 123 kt | 12 h 38 min | 9:39 am EDT (13:39 UTC) | |
| 5,500 ft | 240° at 8 kt | −8 kt | 13 °C | 128 kt | 12 h 08 min | 9:09 am EDT (13:09 UTC) |
| 7,500 ft | 260° at 11 kt | −10 kt | 12 °C | 130 kt | 11 h 57 min | 8:58 am EDT (12:58 UTC) |
| 9,500 ft | 270° at 13 kt | −11 kt | 9 °C | 131 kt | 11 h 52 min | 8:53 am EDT (12:53 UTC) |
| 11,500 ft | 280° at 14 kt | −10 kt | 6 °C | 130 kt | 11 h 57 min | 8:58 am EDT (12:58 UTC) |
| 13,500 ft | 280° at 15 kt | −10 kt | 2 °C | 130 kt | 11 h 57 min | 8:58 am EDT (12:58 UTC) |
| 15,500 ft | 280° at 16 kt | −11 kt | -2 °C | 131 kt | 11 h 52 min | 8:53 am EDT (12:53 UTC) |
| 17,500 ft | 280° at 17 kt | −12 kt | -6 °C | 132 kt | 11 h 46 min | 8:47 am EDT (12:47 UTC) |
| 18,000 ft FL180 | 280° at 18 kt | −12 kt | -7 °C | 132 kt | 11 h 46 min | 8:47 am EDT (12:47 UTC) |
| 24,000 ft FL240 | 280° at 20 kt | −15 kt | -18 °C | 135 kt | 11 h 31 min | 8:32 am EDT (12:32 UTC) |
| 30,000 ft FL300 | 270° at 34 kt | −27 kt | -32 °C | 147 kt | 10 h 34 min | 7:35 am EDT (11:35 UTC) |
| 34,000 ft FL340 | 270° at 38 kt | −31 kt | -40 °C | 151 kt | 10 h 17 min | 7:18 am EDT (11:18 UTC) |
| 39,000 ft FL390 | 270° at 38 kt | −31 kt | -50 °C | 151 kt | 10 h 17 min | 7:18 am EDT (11:18 UTC) |
Based on data from the 11th at 18:00 UTC; valid on the 12th at 00:00 UTC for use 20:00 to 03:00 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 | 130/22 | 140/24 18° | 170/19 13° | 190/13 7° | 240/15 -4° | 220/14 -13° | 270/11 -28° | 280/10 -40° | 310/18 -51° |
| CLL | used from 50 nm out; 54 nm from the line | 160/18 | 190/18 16° | 200/19 12° | 220/14 7° | 260/18 -5° | 250/20 -13° | 290/29 -29° | 290/31 -40° | 300/22 -53° |
| SHV | used from 199 nm out; 72 nm from the line | 190/11 | 230/19 17° | 230/26 12° | 260/15 7° | 280/16 -4° | 300/17 -15° | 300/34 -30° | 300/31 -41° | 310/42 -52° |
| LIT | used from 399 nm out; 57 nm from the line | 220/12 | 250/12 17° | 250/18 12° | 260/22 6° | 310/14 -5° | 310/25 -17° | 310/40 -31° | 310/38 -41° | 310/46 -52° |
| MEM | used from 498 nm out; 21 nm from the line | 240/9 | 280/14 17° | 280/20 12° | 290/25 5° | 320/25 -6° | 330/31 -18° | 320/52 -32° | 330/58 -41° | 320/42 -50° |
| BNA | used from 648 nm out; 50 nm from the line | 280/13 | 340/34 16° | 330/38 10° | 330/44 5° | 330/39 -8° | 330/38 -19° | 320/49 -34° | 330/53 -40° | 330/35 -47° |
| LOU | used from 797 nm out; 52 nm from the line | 320/15 | 340/24 14° | 330/28 9° | 340/34 4° | 340/37 -9° | 340/42 -20° | 320/39 -35° | 320/45 -39° | 330/40 -47° |
| CVG | used from 847 nm out; 71 nm from the line | 350/13 | 340/20 13° | 340/22 8° | 350/30 3° | 340/30 -9° | 340/38 -21° | 330/37 -35° | 320/38 -40° | 310/35 -47° |
| CRW | used from 947 nm out; 43 nm from the line | 320/16 | 310/16 12° | 320/12 7° | 320/12 2° | 330/15 -11° | 280/11 -22° | 230/26 -30° | 240/33 -37° | 240/37 -47° |
| EKN | used from 1046 nm out; 51 nm from the line | 270/18 13° | 310/5 7° | 140/7 3° | 210/16 -9° | 220/41 -20° | 210/57 -32° | 220/57 -38° | 230/49 -47° | |
| AGC | used from 1096 nm out; 28 nm from the line | 140/12 | 350/10 12° | L/V 9° | L/V 3° | 200/11 -11° | 220/21 -22° | 220/47 -33° | 230/51 -39° | 230/45 -48° |
| PSB | used from 1146 nm out; 38 nm from the line | 260/13 13° | 220/12 8° | 220/11 4° | 230/27 -11° | 210/31 -21° | 220/73 -32° | 220/75 -40° | 230/66 -50° | |
| AVP | used from 1246 nm out; 43 nm from the line | 110/36 | 190/34 13° | 230/11 8° | 230/16 4° | 230/26 -8° | 220/40 -19° | 230/73 -33° | 230/98 -41° | 230/87 -51° |
| ALB | used from 1395 nm out; 35 nm from the line | 160/27 | 190/16 9° | 200/29 7° | 230/21 3° | 240/24 -9° | 240/43 -19° | 230/65 -33° | 240/91 -42° | 230/99 -53° |
| BDL | used from 1445 nm out; 35 nm from the line | 140/28 | 180/29 10° | 220/38 8° | 250/30 3° | 250/40 -8° | 240/46 -18° | 240/58 -32° | 240/80 -41° | 240/89 -55° |
| BOS | used from 1495 nm out; 38 nm from the line | 160/27 | 190/23 9° | 260/20 7° | 260/32 1° | 250/48 -7° | 240/56 -17° | 240/59 -33° | 250/75 -43° | 250/94 -55° |
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, 4 nm south of the line, tower | no report just now | 594 ft | ||||
| DTN Shreveport, LA | 299 nm out, 8 nm southeast of the line, tower | no report just now | 179 ft | ||||
| ELD El Dorado, AR | 369 nm out, 4 nm southwest of the line | no report just now | 277 ft | ||||
| OLV Olive Branch, MS | 548 nm out, 3 nm southeast of the line, tower | no report just now | 401 ft | ||||
| JWN Nashville, TN | 707 nm out, 21 nm southeast of the line, tower | no report just now | 501 ft | ||||
| LEX Lexington, KY | 857 nm out, 16 nm northwest of the line, tower | no report just now | 979 ft | ||||
| PKB Parkersburg, WV | 1026 nm out, 8 nm northwest of the line, tower | no report just now | 858 ft | ||||
| JST Johnstown, PA | 1156 nm out, 4 nm northeast of the line, tower | no report just now | 2,284 ft | ||||
| AVP Wilkes-Barre/Scranton, PA | 1315 nm out, 7 nm south of the line, tower | no report just now | 961 ft | ||||
| MHT Manchester, NH | 1525 nm out, 3 nm north of the line, tower | no report just now | 266 ft | ||||
| PSM Portsmouth, NH | destination | no report just now | 100 ft |
The highest airport on this list sits at 2,284 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At PSM when you get there the forecast at the estimated arrival, 7:18 am EDT (11:18 UTC)
PSM has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
- 6/5849 Austin, TX, Friday, October 2, 2026 through Monday, October 12, 2026 UTC 11 nm from the route, at the departure end · drones kept away from a public gathering · until 12 October · ZHU
- 6/0708 Goodlettsville, TN, Saturday, August 1, 2026 through Sunday, August 1, 2027 UTC 16 nm from the route, 717 nm along the route · security · until 1 August · ZME
Daylight
Sunset at SAT 7:06 pm CDT (00:06 UTC), at PSM 6:05 pm EDT (22:05 UTC) (civil twilight ends 6:34 pm EDT (22:34 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, Portsmouth International AT Pease.