Billings Logan International to San Antonio International BIL → SAT
1,086 nautical miles (1,250 statute miles) southeast on a straight line, true course 151°, about 141° magnetic at the departure end (variation 10E). At 120 knots that is 8 h 41 min at the quickest height in today's winds (39,000 ft, a 5-knot tailwind), arriving about 4:26 pm CDT (21:26 UTC). Right now BIL is marginal VFR, wind from the west-northwest (290°) at 4 knots; SAT is marginal VFR, wind from the east (100°) at 4 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 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 4E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the first 149 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 18,000 ft. Over the first 0 nm of the route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 219 nm of the route.
- AIRMET TANGO 1W: 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 179 to 329 nm out.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft (due to mountain wave) from 34,000 ft to 43,000 ft. Over the route from 189 to 478 nm out.
- AIRMET TANGO 2W: moderate turbulence below 18,000 ft (due to mountain wave) up to 22,000 ft. Over the route from 209 to 379 nm out.
- AIRMET TANGO 5W: strong surface winds (30 knots or more) (due to sustained surface winds greater than 30 knots). Near the route, 229 nm along the route.
- AIRMET TANGO 1W: 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 389 to 468 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 787 to 867 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 BIL.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- urgent TBM7 at 100 ft, 32 nm southwest, 6:30 am MDT (12:30 UTC): light chop turbulence, remarks: low-level wind shear a 10-knot loss of airspeed. 408 nm along the route, 32 nm southwest of the line.
as filed, and in English
APA UUA /OV APA140001/TM 1230/FL001/TP TBM7/TB LGT CHOP/RM LLWS +-10KTS
- Report
- an urgent report filed through APA
- Where
- 1 nm southeast (140°) of APA
- Time
- 12:30 UTC
- Height
- at 100 ft
- Aircraft
- TBM7
- Turbulence
- light chop
- Remarks
- low-level wind shear a 10-knot loss of airspeed
- B737 at 16,000 ft, 22 nm southwest, 6:23 am MDT (12:23 UTC): moderate turbulence, remarks: during the descent. 359 nm along the route, 22 nm southwest of the line.
as filed, and in English
DEN UA /OV DEN320040/TM 1223/FL160/TP B737/TB MOD/RM DURD
- Report
- a routine report filed through DEN
- Where
- 40 nm northwest (320°) of DEN
- Time
- 12:23 UTC
- Height
- at 16,000 ft
- Aircraft
- B737
- Turbulence
- moderate
- Remarks
- during the descent
- C172 at 200 ft, 32 nm west, 6:35 am MDT (12:35 UTC): moderate turbulence, remarks: low-level wind shear a 15-knot loss of airspeed. 408 nm along the route, 32 nm west of the line.
as filed, and in English
APA UA /OV APA350001/TM 1235/FL002/TP C172/TB MOD TURB/RM LLWS +-15KTS
- Report
- a routine report filed through APA
- Where
- 1 nm north (350°) of APA
- Time
- 12:35 UTC
- Height
- at 200 ft
- Aircraft
- C172
- Turbulence
- moderate turbulence
- Remarks
- low-level wind shear a 15-knot loss of airspeed
- CRJ2 at 19,000 ft, 45 nm southwest, 5:49 am MDT (11:49 UTC): no turbulence, remarks: ZDVWC-13. 329 nm along the route, 45 nm southwest of the line.
as filed, and in English
DEN UA /OV DEN304074/TM 1149/FL190/TP CRJ2/TB NEG/RM ZDVWC-13
- Report
- a routine report filed through DEN
- Where
- 74 nm northwest (304°) of DEN
- Time
- 11:49 UTC
- Height
- at 19,000 ft
- Aircraft
- CRJ2
- Turbulence
- none
- Remarks
- ZDVWC-13
- CRJ2 at 24,000 ft, 29 nm southwest, 5:45 am MDT (11:45 UTC): no turbulence, remarks: ZDVWC-13. 339 nm along the route, 29 nm southwest of the line.
as filed, and in English
DEN UA /OV DEN314057/TM 1145/FL240/TP CRJ2/TB NEG/RM ZDVWC-13
- Report
- a routine report filed through DEN
- Where
- 57 nm northwest (314°) of DEN
- Time
- 11:45 UTC
- Height
- at 24,000 ft
- Aircraft
- CRJ2
- Turbulence
- none
- Remarks
- ZDVWC-13
- B38M at 21,000 ft, 47 nm southwest, 5:24 am MDT (11:24 UTC): light to moderate chop turbulence, remarks: during the climb zdvwc. 369 nm along the route, 47 nm southwest of the line.
as filed, and in English
DEN UA /OV DEN277039/TM 1124/FL210/TP B38M/TB LGT-MOD CHOP BLO 180 NEG ABV 180/RM DURC. ZDVWC
- Report
- a routine report filed through DEN
- Where
- 39 nm west (277°) of DEN
- Time
- 11:24 UTC
- Height
- at 21,000 ft
- Aircraft
- B38M
- Turbulence
- light to moderate chop below 18,000 ft no above 18,000 ft
- Remarks
- during the climb zdvwc
- B763 at 23,000 ft, 45 nm southwest, 4:26 am MDT (10:26 UTC): light chop turbulence, remarks: zdvwc. 369 nm along the route, 45 nm southwest of the line.
as filed, and in English
DEN UA /OV DEN278037/TM 1026/FL230/TP B763/TB OCNL LGT CHOP/RM ZDVWC
- Report
- a routine report filed through DEN
- Where
- 37 nm west (278°) of DEN
- Time
- 10:26 UTC
- Height
- at 23,000 ft
- Aircraft
- B763
- Turbulence
- occasional light chop
- Remarks
- zdvwc
- B738 at 5,500 ft, 18 nm west, 6:28 am MDT (12:28 UTC): no turbulence. 399 nm along the route, 18 nm west of the line.
as filed, and in English
DEN UA /OV KDEN/TM 1228/FLSFC/TP B738/TB NEG
- Report
- a routine report filed through DEN
- Where
- over KDEN
- Time
- 12:28 UTC
- Height
- at the surface
- Aircraft
- B738
- Turbulence
- none
- B737 at 17,000 ft, 33 nm southwest, 6:24 am MDT (12:24 UTC): no turbulence, no icing, vfr; clear up to 60,000 ft, remarks: not bad for denver. 428 nm along the route, 33 nm southwest of the line.
as filed, and in English
DEN UA /OV DEN170035/TM 1224/FL170/TP B737/SK VFR/WX SKC/TA UNK/TB NEG/IC NEG/RM NOT BAD FOR DENVER
- Report
- a routine report filed through DEN
- Where
- 35 nm south (170°) of DEN
- Time
- 12:24 UTC
- Height
- at 17,000 ft
- Aircraft
- B737
- Sky
- vfr
- Weather
- clear sky
- Temperature
- UNK
- Turbulence
- none
- Icing
- none
- Remarks
- not bad for denver
- B738 at 11,000 ft, 47 nm southwest, 5:42 am MDT (11:42 UTC): light chop turbulence, remarks: during the climb. 458 nm along the route, 47 nm southwest of the line.
as filed, and in English
COS UA /OV BRK172014/TM 1142/FL110/TP B738/TB LGT CHOP/RM DURC
- Report
- a routine report filed through COS
- Where
- 14 nm south (172°) of BRK
- Time
- 11:42 UTC
- Height
- at 11,000 ft
- Aircraft
- B738
- Turbulence
- light chop
- Remarks
- during the climb
- B737 at 38,000 ft, 3 nm north, 5:05 am MDT (11:05 UTC): light chop turbulence, wind 306° at 27 knots. 986 nm along the route, 3 nm north of the line.
as filed, and in English
BWD UA /OV SJT094066/TM 1105/FL380/TP B737/WV 306027KT/TB LGT CHOP CONS/RM AWC-WEB
- Report
- a routine report filed through BWD
- Where
- 66 nm east (094°) of SJT
- Time
- 11:05 UTC
- Height
- at 38,000 ft
- Aircraft
- B737
- Wind
- from 306° at 27 knots
- Turbulence
- light chop continuous
- Remarks
- B737 at 2,000 ft, 5 nm southeast, 6:15 am MDT (12:15 UTC): overcast from 2,000 ft to 3,800 ft. At the destination end, 5 nm southeast of the line.
as filed, and in English
SAT UA /OV SAT/TM 1215/FL020/TP B737/SK OVC020 TOP038
- Report
- a routine report filed through SAT
- Where
- over SAT
- Time
- 12:15 UTC
- Height
- at 2,000 ft
- Aircraft
- B737
- Sky
- overcast from 2,000 ft, tops 3,800 ft
- B737 at 1,800 ft, 5 nm southeast, 5:18 am MDT (11:18 UTC): remarks: KSAT base 1,800 ft, on top 3,500 ft. At the destination end, 5 nm southeast of the line.
as filed, and in English
SAT UA /OV SAT/TM 1118/FL018/TP B737/RM KSAT BASE 018, ON TOP 035
- Report
- a routine report filed through SAT
- Where
- over SAT
- Time
- 11:18 UTC
- Height
- at 1,800 ft
- Aircraft
- B737
- Remarks
- KSAT base 1,800 ft, on top 3,500 ft
- A320 at 2,300 ft, 5 nm southeast, 4:37 am MDT (10:37 UTC): remarks: KSAT base 2,300 ft, on top 4,000 ft. At the destination end, 5 nm southeast of the line.
as filed, and in English
SAT UA /OV SAT/TM 1037/FL023/TP A320/RM KSAT BASE 023, ON TOP 040
- Report
- a routine report filed through SAT
- Where
- over SAT
- Time
- 10:37 UTC
- Height
- at 2,300 ft
- Aircraft
- A320
- Remarks
- KSAT base 2,300 ft, on top 4,000 ft
Winds aloft along the route, and the time en route the forecast for use 08:00–15:00 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 10 forecast points nearest it (BIL, LND, BFF, DEN, PUB, GCK, AMA, LBB, ABI, 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 |
|---|---|---|---|---|---|---|
| 5,500 ft | 230° at 22 kt | +6 kt | 20 °C | 114 kt | 9 h 32 min | 5:17 pm CDT (22:17 UTC) |
| 7,500 ft | 240° at 23 kt | 0 | 13 °C | 120 kt | 9 h 03 min | 4:48 pm CDT (21:48 UTC) |
| 9,500 ft | 240° at 23 kt | 0 | 10 °C | 120 kt | 9 h 03 min | 4:48 pm CDT (21:48 UTC) |
| 11,500 ft | 240° at 23 kt | +3 kt | 6 °C | 117 kt | 9 h 17 min | 5:02 pm CDT (22:02 UTC) |
| 13,500 ft | 230° at 26 kt | +5 kt | 2 °C | 115 kt | 9 h 27 min | 5:12 pm CDT (22:12 UTC) |
| 15,500 ft | 230° at 30 kt | +8 kt | -2 °C | 112 kt | 9 h 42 min | 5:27 pm CDT (22:27 UTC) |
| 17,500 ft | 230° at 33 kt | +10 kt | -7 °C | 110 kt | 9 h 52 min | 5:37 pm CDT (22:37 UTC) |
| 18,000 ft FL180 | 230° at 34 kt | +11 kt | -8 °C | 109 kt | 9 h 58 min | 5:43 pm CDT (22:43 UTC) |
| 24,000 ft FL240 | 230° at 42 kt | +12 kt | -19 °C | 108 kt | 10 h 03 min | 5:48 pm CDT (22:48 UTC) |
| 30,000 ft FL300 | 240° at 54 kt | +6 kt | -30 °C | 114 kt | 9 h 32 min | 5:17 pm CDT (22:17 UTC) |
| 34,000 ft FL340 | 240° at 54 kt | −1 kt | -37 °C | 121 kt | 8 h 59 min | 4:44 pm CDT (21:44 UTC) |
| 39,000 ft FL390 | 250° at 50 kt | −5 kt | -48 °C | 125 kt | 8 h 41 min | 4:26 pm CDT (21:26 UTC) |
Based on data from the 12th at 06:00 UTC; valid on the 12th at 12:00 UTC for use 08:00 to 15:00 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| BIL | used from 0 nm out; 25 nm from the line | 300/14 | 270/19 -2° | 260/26 -2° | 220/28 -13° | 210/51 -25° | 220/56 -33° | 220/61 -39° | 220/72 -45° | |
| LND | used from 100 nm out; 99 nm from the line | 240/10 3° | 240/30 0° | 220/42 -13° | 230/52 -23° | 220/54 -33° | 220/52 -36° | 220/53 -44° | ||
| BFF | used from 199 nm out; 116 nm from the line | 280/28 | 260/39 11° | 240/34 5° | 210/38 -11° | 210/52 -22° | 230/61 -31° | 230/61 -36° | 240/56 -45° | |
| DEN | used from 299 nm out; 73 nm from the line | 270/24 11° | 230/13 5° | 230/48 -8° | 230/46 -20° | 230/63 -30° | 240/78 -36° | 240/78 -48° | ||
| PUB | used from 448 nm out; 53 nm from the line | 260/45 11° | 240/38 6° | 230/47 -8° | 230/51 -19° | 240/74 -29° | 240/82 -35° | 250/72 -48° | ||
| GCK | used from 548 nm out; 100 nm from the line | 240/40 22° | 240/40 14° | 240/38 7° | 230/39 -7° | 230/45 -20° | 250/73 -28° | 260/74 -36° | 260/64 -49° | |
| AMA | used from 598 nm out; 86 nm from the line | 230/32 | 230/28 14° | 230/27 7° | 230/38 -6° | 230/50 -17° | 250/69 -28° | 260/62 -37° | 270/65 -49° | |
| LBB | used from 747 nm out; 58 nm from the line | 220/25 21° | 230/20 15° | 220/20 7° | 230/36 -6° | 240/50 -15° | 240/59 -28° | 260/52 -37° | 260/45 -50° | |
| ABI | used from 847 nm out; 33 nm from the line | 200/30 19° | 220/12 16° | 220/11 9° | 230/15 -5° | 250/26 -15° | 250/39 -28° | 270/36 -38° | 280/30 -51° | |
| SAT | used from 996 nm out; 65 nm from the line | 160/18 | 180/22 17° | 190/16 14° | 210/16 9° | 220/16 -5° | 200/11 -14° | 250/8 -29° | 330/8 -40° | 020/26 -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 |
|---|---|---|---|---|---|---|---|
| BIL Billings, MT | departure | marginal VFR Sky: a few clouds at 1,200 feet, overcast at 2,500 feet | from the west-northwest (290°) at 4 knots | 10+ mi | 2,500 ft | 3,662 ft | 5:53 am MDT (11:53 UTC) |
| GEY Greybull, WY | 80 nm out, 21 nm west of the line | marginal VFR Sky: overcast at 1,300 feet | from the west-northwest (300°) at 10 knots | 10+ mi | 1,300 ft | 3,941 ft | 11:53 UTC |
| CPR Casper, WY | 199 nm out, 6 nm west of the line, tower | VFR Sky: overcast at 5,500 feet | from the west-southwest (240°) at 9 knots | 10+ mi | 5,500 ft | 5,344 ft | 11:53 UTC |
| CYS Cheyenne, WY | 319 nm out, 13 nm east of the line, tower | VFR | from the north (350°) at 3 knots | 10+ mi | none | 6,159 ft | 11:53 UTC |
| CFO Denver, CO | 399 nm out, 14 nm southwest of the line, tower | VFR | from the south-southwest (210°) at 15 knots | 10+ mi | none | 5,515 ft | 12:35 UTC |
| LIC Limon, CO | 448 nm out, 9 nm northeast of the line | VFR | from the west-northwest (290°) at 5 knots | 10+ mi | none | 5,374 ft | 11:55 UTC |
| AMA Amarillo, TX | 707 nm out, 11 nm southwest of the line, tower | VFR Sky: a broken layer at 12,000 feet | from the south-southwest (200°) at 13 knots | 10+ mi | 12,000 ft | 3,606 ft | 11:53 UTC |
| ABI Abilene, TX | 907 nm out, 12 nm northeast of the line, tower | VFR | from the south (170°) at 9 knots | 10+ mi | none | 1,790 ft | 11:52 UTC |
| ERV Kerrville, TX | 1046 nm out, 19 nm southwest of the line | marginal VFR Sky: overcast at 1,300 feet | from the south-southeast (160°) at 6 knots | 10+ mi | 1,300 ft | 1,616 ft | 12:35 UTC |
| SAT San Antonio, TX | destination | marginal VFR Sky: a broken layer at 1,600 feet, a broken layer at 2,500 feet | from the east (100°) at 4 knots | 10+ mi | 1,600 ft | 809 ft | 6:51 am CDT (11:51 UTC) |
The highest airport on this list sits at 6,159 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, 4:26 pm CDT (21:26 UTC)
Wind from the south-southeast at 12 knots, visibility more than 6 miles, a broken layer at 3,500 feet VFR
The whole forecast for SAT
- From Mon 7:00 am CDT (12:00 UTC): wind from the east-southeast at 5 knots, visibility more than 6 miles, a broken layer at 1,500 feet
- At times between Mon 8:00 am CDT (13:00 UTC) and 11:00 am CDT (16:00 UTC): a broken layer at 2,500 feet
- From Mon 12:00 pm CDT (17:00 UTC): wind from the south-southeast at 12 knots, visibility more than 6 miles, a broken layer at 3,500 feet
- From Tue 1:00 am CDT (06:00 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
The forecast for BIL, the departure
- From Mon 6:00 am MDT (12:00 UTC): wind from the north-northwest at 8 knots, visibility more than 6 miles, light rain snow, a broken layer at 1,200 feet, overcast at 2,200 feet
- From Mon 1:00 pm MDT (19:00 UTC): wind light and variable, visibility more than 6 miles, scattered clouds at 1,500 feet, overcast at 2,500 feet
- From Mon 6:00 pm MDT (00:00 UTC): wind from the east at 9 knots, visibility 6 miles, light drizzle, mist, a few clouds at 300 feet, overcast at 1,800 feet
- From Mon 10:00 pm MDT (04:00 UTC): wind from the east at 9 knots, visibility 4 miles, light drizzle, mist, scattered clouds at 300 feet, overcast at 1,200 feet
- From Tue 3:00 am MDT (09:00 UTC): wind light and variable, visibility 3 miles, light rain, mist, scattered clouds at 300 feet, a broken layer at 1,200 feet and more above
Temporary flight restrictions on the line or within 25 nm of it
No temporary flight restriction on or near this route right now.
Daylight
Sunset at BIL 6:32 pm MDT (00:32 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: Billings Logan International, San Antonio International.