Portsmouth International AT Pease to San Antonio International PSM → SAT
1,554 nautical miles (1,789 statute miles) west on a straight line, true course 248°, about 264° magnetic at the departure end (variation 16W). At 120 knots that is 13 h 38 min at the quickest height in today's winds (4,500 ft, a 6-knot headwind), arriving about 12:10 pm CDT (17:10 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
- SIGMET E11E: thunderstorms (a convective SIGMET) up to 34,000 ft, moving from the southwest at 20 knots, until 12:55 am EDT (04:55 UTC). Near the route, 399 nm along the route.
as issued
WSUS31 KKCI 120255 MKCE WST 120255 CONVECTIVE SIGMET 11E VALID UNTIL 0455Z NY NJ PA DE MD VA DC WV AND DE NJ NY MD CT VA CSTL WTRS FROM 20NE JFK-90SE SIE-20NNW ORF-30ENE EKN-10S JST-20NE JFK AREA EMBD TS MOV FROM 24020KT. TOPS TO FL340.
- 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 827 nm of the route.
- AIRMET ZULU 1C: moderate icing up to 25,000 ft. Over the first 140 nm of the route.
- AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the first 488 nm of the route.
- AIRMET TANGO 2W: moderate turbulence below 18,000 ft up to 13,000 ft. Over the first 259 nm of the route.
- AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 120 to 548 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 PSM.
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 15 forecast points nearest it (BOS, BDL, ALB, AVP, PSB, AGC, CRW, CVG, LOU, 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 6 kt | +6 kt | 13 °C | 114 kt | 13 h 38 min | 12:10 pm CDT (17:10 UTC) |
| 6,500 ft | 290° at 10 kt | +7 kt | 14 °C | 113 kt | 13 h 45 min | 12:17 pm CDT (17:17 UTC) |
| 8,500 ft | 290° at 12 kt | +8 kt | 11 °C | 112 kt | 13 h 52 min | 12:24 pm CDT (17:24 UTC) |
| 10,500 ft | 300° at 13 kt | +7 kt | 7 °C | 113 kt | 13 h 45 min | 12:17 pm CDT (17:17 UTC) |
| 12,500 ft | 300° at 13 kt | +7 kt | 4 °C | 113 kt | 13 h 45 min | 12:17 pm CDT (17:17 UTC) |
| 14,500 ft | 290° at 15 kt | +8 kt | 0 °C | 112 kt | 13 h 52 min | 12:24 pm CDT (17:24 UTC) |
| 16,500 ft | 290° at 16 kt | +10 kt | -4 °C | 110 kt | 14 h 08 min | 12:40 pm CDT (17:40 UTC) |
| 18,000 ft FL180 | 290° at 18 kt | +11 kt | -7 °C | 109 kt | 14 h 15 min | 12:47 pm CDT (17:47 UTC) |
| 24,000 ft FL240 | 290° at 20 kt | +12 kt | -18 °C | 108 kt | 14 h 23 min | 12:55 pm CDT (17:55 UTC) |
| 30,000 ft FL300 | 290° at 32 kt | +18 kt | -33 °C | 102 kt | 15 h 14 min | 1:46 pm CDT (18:46 UTC) |
| 34,000 ft FL340 | 290° at 38 kt | +24 kt | -40 °C | 96 kt | 16 h 11 min | 2:43 pm CDT (19:43 UTC) |
| 39,000 ft FL390 | 290° at 35 kt | +21 kt | -50 °C | 99 kt | 15 h 42 min | 2:14 pm CDT (19:14 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| BOS | used from 0 nm out; 37 nm from the line | 110/20 | 200/26 12° | 280/24 8° | 260/29 3° | 250/47 -10° | 230/59 -19° | 230/74 -33° | 240/95 -41° | 240/96 -53° |
| BDL | used from 50 nm out; 41 nm from the line | 120/24 | 290/23 12° | 280/21 8° | 250/36 3° | 250/41 -11° | 230/48 -21° | 230/78 -32° | 230/96 -41° | 230/86 -52° |
| ALB | used from 100 nm out; 34 nm from the line | 120/9 | 270/8 10° | L/V 5° | 260/9 1° | 260/34 -10° | 250/42 -22° | 240/57 -35° | 240/70 -42° | 240/65 -50° |
| AVP | used from 199 nm out; 19 nm from the line | 150/5 | 350/13 12° | 270/20 8° | 260/17 4° | 260/25 -11° | 240/31 -22° | 240/54 -35° | 230/61 -41° | 240/55 -49° |
| PSB | used from 299 nm out; 31 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° | |
| AGC | used from 399 nm out; 32 nm from the line | 350/14 | 330/20 11° | 340/18 8° | 330/17 3° | 340/22 -11° | 340/31 -22° | 330/33 -36° | 300/34 -41° | 300/35 -47° |
| CRW | used from 498 nm out; 56 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° |
| CVG | used from 648 nm out; 69 nm from the line | 320/18 | 350/32 16° | 350/35 10° | 350/30 3° | 330/30 -7° | 340/44 -20° | 340/58 -35° | 330/72 -41° | 320/36 -49° |
| LOU | used from 698 nm out; 53 nm from the line | 310/18 | 340/28 16° | 340/29 10° | 350/27 3° | 330/27 -7° | 340/39 -19° | 330/58 -33° | 330/67 -41° | 330/40 -49° |
| BNA | used from 797 nm out; 35 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 947 nm out; 40 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 1096 nm out; 55 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 1196 nm out; 39 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 1345 nm out; 62 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 1495 nm out; 35 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 |
|---|---|---|---|---|---|---|---|
| PSM Portsmouth, NH | departure | no report just now | 100 ft | ||||
| MHT Manchester, NH | 30 nm out, 3 nm north of the line, tower | no report just now | 266 ft | ||||
| AVP Wilkes-Barre/Scranton, PA | 239 nm out, 7 nm south of the line, tower | no report just now | 961 ft | ||||
| JST Johnstown, PA | 399 nm out, 4 nm northeast of the line, tower | no report just now | 2,284 ft | ||||
| PKB Parkersburg, WV | 528 nm out, 8 nm northwest of the line, tower | no report just now | 858 ft | ||||
| LEX Lexington, KY | 698 nm out, 16 nm northwest of the line, tower | no report just now | 979 ft | ||||
| JWN Nashville, TN | 847 nm out, 21 nm southeast of the line, tower | no report just now | 501 ft | ||||
| OLV Olive Branch, MS | 1006 nm out, 3 nm southeast of the line, tower | no report just now | 401 ft | ||||
| ELD El Dorado, AR | 1186 nm out, 4 nm southwest of the line | no report just now | 277 ft | ||||
| DTN Shreveport, LA | 1256 nm out, 8 nm southeast of the line, tower | no report just now | 179 ft | ||||
| HYI Austin, TX | 1515 nm out, 4 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 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 SAT when you get there the forecast at the estimated arrival, 12:10 pm CDT (17:10 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 16 nm from the route, 837 nm along the route · security · until 1 August · ZME
- 6/5849 Austin, TX, Friday, October 2, 2026 through Monday, October 12, 2026 UTC 11 nm from the route, at the destination end · drones kept away from a public gathering · until 12 October · ZHU
Daylight
Sunset at PSM 6:05 pm EDT (22:05 UTC), at SAT 7:06 pm CDT (00:06 UTC) (civil twilight ends 7:30 pm CDT (00:30 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: Portsmouth International AT Pease, San Antonio International.