Plan a flight · Mon 8:09 am CDT (13:09 UTC)

San Antonio International to Seattle-Tacoma International SAT → SEA

1,541 nautical miles (1,774 statute miles) northwest on a straight line, true course 321°, about 317° magnetic at the departure end (variation 4E). At 120 knots that is 12 h 32 min at the quickest height in today's winds (18,000 ft, a 3-knot tailwind), arriving about 6:41 pm PDT (01:41 UTC), after sunset at the destination. Right now SAT is marginal VFR, wind from the east-southeast (110°) at 5 knots; SEA is VFR, wind from the southeast (130°) at 5 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: 1,116 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 W25W: thunderstorms (a convective SIGMET) up to 27,000 ft, moving from the west at 45 knots, until 9:55 am CDT (14:55 UTC). Over the route from 935 to 1014 nm out.
as issued
```
WSUS33 KKCI 121255
MKCW WST 121255
CONVECTIVE SIGMET 25W
VALID UNTIL 1455Z
WY UT ID
FROM PIH-40W BPI-30SE SLC-40E BVL-PIH
AREA TS MOV FROM 26045KT. TOPS TO FL270.
```
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 477 to 915 nm out.
AIRMET TANGO 2W: moderate turbulence below 18,000 ft (due to mountain wave) up to 22,000 ft. Over the route from 507 to 746 nm out.
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). Near the route, 577 nm along the route.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 686 to 1372 nm out.
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). Near the route, 736 nm along the route.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 746 to 1173 nm out.
AIRMET TANGO 1W: moderate turbulence below 18,000 ft (due to mountain wave) up to 12,000 ft. Over the route from 756 to 955 nm out.
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 route from 1044 to 1183 nm out.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the route from 1223 to 1511 nm out.
AIRMET ZULU 2C: moderate icing up to 18,000 ft. Over the route from 1283 to 1332 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 SAT.

Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first

B737 at 2,000 ft, 7 nm north, 7:15 am CDT (12:15 UTC): overcast from 2,000 ft to 3,800 ft. At the departure end, 7 nm north 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, 7 nm north, 6:18 am CDT (11:18 UTC): remarks: KSAT base 1,800 ft, on top 3,500 ft. At the departure end, 7 nm north 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, 7 nm north, 5:37 am CDT (10:37 UTC): remarks: KSAT base 2,300 ft, on top 4,000 ft. At the departure end, 7 nm north 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
B737 at 38,000 ft, 30 nm northeast, 6:05 am CDT (11:05 UTC): light chop turbulence, wind 306° at 27 knots. 99 nm along the route, 30 nm northeast 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
E170 at 20,000 ft, 48 nm southwest, 6:49 am CDT (11:49 UTC): light chop turbulence, remarks: ZFW82. 308 nm along the route, 48 nm southwest of the line.
as filed, and in English
```
HOB UA /OV HOB030020/TM 1149/FL200/TP E170/TB CONS LGT CHOP/RM ZFW82
```
Report
a routine report filed through HOB
Where
20 nm northeast (030°) of HOB
Time
11:49 UTC
Height
at 20,000 ft
Aircraft
E170
Turbulence
continuous light chop
Remarks
ZFW82
A359 at 38,000 ft, 21 nm northeast, 5:13 am CDT (10:13 UTC): light chop turbulence, remarks: ZDVWC-37. 676 nm along the route, 21 nm northeast of the line.
as filed, and in English
```
GUC UA /OV HBU185015/TM 1013/FL380/TP A359/TB CONS LGT CHOP/RM ZDVWC-37
```
Report
a routine report filed through GUC
Where
15 nm south (185°) of HBU
Time
10:13 UTC
Height
at 38,000 ft
Aircraft
A359
Turbulence
continuous light chop
Remarks
ZDVWC-37
PC12 at 5,000 ft, 14 nm northeast, 6:23 am CDT (11:23 UTC): light to moderate turbulence, no icing, remarks: during the descent zdvwc. 756 nm along the route, 14 nm northeast of the line.
as filed, and in English
```
GJT UA /OV GJT/TM 1123/FL050/TP PC12/TB LGT-MOD/IC NEG/RM DURD. ZDVWC
```
Report
a routine report filed through GJT
Where
over GJT
Time
11:23 UTC
Height
at 5,000 ft
Aircraft
PC12
Turbulence
light to moderate
Icing
none
Remarks
during the descent zdvwc
BCS1 at 25,000 ft, 45 nm northeast, 7:22 am CDT (12:22 UTC): a routine report with nothing remarked on. 1054 nm along the route, 45 nm northeast of the line.
as filed, and in English
```
PIH UA /OV PIH/TM 1222/FL250/TP BCS1/SK TOP 265/ZLC
```
Report
a routine report filed through PIH
Where
over PIH
Time
12:22 UTC
Height
at 25,000 ft
Aircraft
BCS1
Sky
top 26,500 ft; zlc
CRJ7 at 4,800 ft, 49 nm northeast, 7:10 am CDT (12:10 UTC): overcast above 4,800 ft, remarks: during the descent runway 21 pih. 1054 nm along the route, 49 nm northeast of the line.
as filed, and in English
```
PIH UA /OV KPIH/TM 1210/FL048/TP CRJ7/SK OVC048-TOPUNKN/RM DURD RY21 PIH
```
Report
a routine report filed through PIH
Where
over KPIH
Time
12:10 UTC
Height
at 4,800 ft
Aircraft
CRJ7
Sky
overcast from 4,800 ft, tops unknown
Remarks
during the descent runway 21 pih

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 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 12 forecast points nearest it (SAT, ABI, LBB, TCC, ALS, GJT, SLC, PIH, BOI, LWS, YKM, SEA). 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	220° at 9 kt	−2 kt	11 °C	122 kt	12 h 38 min	6:47 pm PDT (01:47 UTC)
6,500 ft	220° at 9 kt	−1 kt	7 °C	121 kt	12 h 44 min	6:53 pm PDT (01:53 UTC)
8,500 ft	220° at 10 kt	−2 kt	4 °C	122 kt	12 h 38 min	6:47 pm PDT (01:47 UTC)
10,500 ft	230° at 15 kt	−1 kt	2 °C	121 kt	12 h 44 min	6:53 pm PDT (01:53 UTC)
12,500 ft	220° at 18 kt	−1 kt	-2 °C	121 kt	12 h 44 min	6:53 pm PDT (01:53 UTC)
14,500 ft	220° at 22 kt	−1 kt	-5 °C	121 kt	12 h 44 min	6:53 pm PDT (01:53 UTC)
16,500 ft	220° at 25 kt	−2 kt	-10 °C	122 kt	12 h 38 min	6:47 pm PDT (01:47 UTC)
18,000 ft FL180	220° at 28 kt	−3 kt	-12 °C	123 kt	12 h 32 min	6:41 pm PDT (01:41 UTC)
24,000 ft FL240	230° at 34 kt	+4 kt	-22 °C	116 kt	13 h 17 min	7:26 pm PDT (02:26 UTC)
30,000 ft FL300	240° at 43 kt	+7 kt	-31 °C	113 kt	13 h 38 min	7:47 pm PDT (02:47 UTC)
34,000 ft FL340	240° at 44 kt	+12 kt	-37 °C	108 kt	14 h 16 min	8:25 pm PDT (03:25 UTC)
39,000 ft FL390	240° at 39 kt	+11 kt	-45 °C	109 kt	14 h 08 min	8:17 pm PDT (03:17 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
SAT	used from 0 nm out; 25 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°
ABI	used from 99 nm out; 79 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°
LBB	used from 249 nm out; 39 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°
TCC	used from 348 nm out; 58 nm from the line		240/20	230/22 13°	230/27 6°	230/40 -7°	240/55 -18°	240/74 -27°	240/68 -37°	250/64 -49°
ALS	used from 497 nm out; 85 nm from the line				240/35 3°	230/54 -9°	240/66 -19°	230/85 -26°	240/87 -34°	240/70 -47°
GJT	used from 696 nm out; 41 nm from the line			220/26 6°	230/39 0°	220/55 -13°	230/60 -23°	230/78 -31°	230/80 -35°	230/74 -44°
SLC	used from 845 nm out; 78 nm from the line		200/16	210/23 4°	220/34 -3°	210/40 -16°	220/66 -23°	220/64 -31°	220/57 -36°	220/50 -43°
PIH	used from 994 nm out; 58 nm from the line		070/8	150/19 1°	180/32 -4°	210/44 -17°	210/37 -28°	210/74 -31°	220/68 -35°	220/60 -43°
BOI	used from 1094 nm out; 82 nm from the line		320/11 1°	280/8 -5°	220/14 -11°	200/60 -19°	190/66 -31°	210/46 -32°	220/50 -33°	220/43 -39°
LWS	used from 1293 nm out; 83 nm from the line	L/V	340/5 -3°	L/V -6°	040/7 -10°	100/23 -22°	180/30 -31°	190/11 -34°	200/11 -36°	220/23 -40°
YKM	used from 1342 nm out; 84 nm from the line	360/6	360/11 -1°	030/20 -7°	040/21 -11°	020/55 -18°	010/84 -26°	010/79 -40°	010/45 -42°	350/23 -42°
SEA	used from 1492 nm out; 25 nm from the line	350/5	010/6 0°	010/9 -4°	010/27 -6°	010/51 -15°	360/58 -26°	360/60 -41°	350/55 -48°	340/30 -45°

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	marginal VFR Sky: a broken layer at 1,500 feet, a broken layer at 2,600 feet	from the east-southeast (110°) at 5 knots	10+ mi	1,500 ft	809 ft	7:51 am CDT (12:51 UTC)
SJT San Angelo, TX	149 nm out, 11 nm southwest of the line, tower	marginal VFR Sky: a broken layer at 1,700 feet, overcast at 2,700 feet	from the south (170°) at 8 knots	10+ mi	1,700 ft	1,918 ft	12:51 UTC
BFE Brownfield, TX	288 nm out, 6 nm southwest of the line	no report just now				3,264 ft
CVN Clovis, NM	378 nm out, 11 nm northeast of the line	VFR Sky: a few clouds at 12,000 feet	from the south (180°) at 6 knots	10+ mi	none	4,215 ft	12:56 UTC
SKX Taos, NM	547 nm out, 4 nm northwest of the line	no report just now				7,094 ft
GJT Grand Junction, CO	756 nm out, 14 nm northeast of the line, tower	VFR	from the east-southeast (110°) at 10 knots	10+ mi	none	4,861 ft	12:53 UTC
HCR Heber, UT	915 nm out, 22 nm southwest of the line	VFR Sky: a broken layer at 4,600 feet, a broken layer at 7,000 feet, overcast at 9,500 feet	calm	10+ mi	4,600 ft	5,636 ft	12:55 UTC
OGD Ogden, UT	965 nm out, 9 nm southwest of the line, tower	marginal VFR Sky: scattered clouds at 2,600 feet, a broken layer at 3,000 feet, overcast at 5,500 feet Weather: light rain	from the west-northwest (290°) at 7 knots	10+ mi	3,000 ft	4,472 ft	13:04 UTC
JER Jerome, ID	1104 nm out, 14 nm southwest of the line	reported, no category	calm		none	4,053 ft	12:53 UTC
PDT Pendleton, OR	1362 nm out, 2 nm north of the line, tower	VFR Sky: a broken layer at 7,000 feet, overcast at 11,000 feet	from the west (280°) at 8 knots	10+ mi	7,000 ft	1,494 ft	12:53 UTC
YKM Yakima, WA	1452 nm out, 0 nm northeast of the line, tower	VFR	from the west (280°) at 4 knots	10+ mi	none	1,098 ft	12:53 UTC
SEA Seattle, WA	destination	VFR	from the southeast (130°) at 5 knots	10+ mi	none	432 ft	5:53 am PDT (12:53 UTC)

The highest airport on this list sits at 7,094 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At SEA when you get there the forecast at the estimated arrival, 6:41 pm PDT (01:41 UTC)

Wind from the west at 6 knots, visibility more than 6 miles, clear skies VFR

The whole forecast for SEA

From Mon 5:00 am PDT (12:00 UTC): wind from the southeast at 5 knots, visibility more than 6 miles, clear skies
From Mon 9:00 am PDT (16:00 UTC): wind light and variable, visibility more than 6 miles, clear skies
From Mon 11:00 am PDT (18:00 UTC): wind from the west at 6 knots, visibility more than 6 miles, clear skies
From Mon 8:00 pm PDT (03:00 UTC): wind from the south at 4 knots, visibility more than 6 miles, scattered clouds at 25,000 feet
From Tue 4:00 am PDT (11:00 UTC): wind from the south at 5 knots, visibility more than 6 miles, overcast at 10,000 feet

The forecast for SAT, the departure

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

Temporary flight restrictions on the line or within 25 nm of it

6/4240 SAN ANGELO, TX, Sunday, March 8, 2026 through Sunday, November 1, 2026 Local 5 nm from the route, 139 nm along the route · security · until 1 November · ZFW

Daylight

Sunset at SAT 7:05 pm CDT (00:05 UTC), at SEA 6:25 pm PDT (01:25 UTC) (civil twilight ends 6:56 pm PDT (01:56 UTC)). At 120 knots the arrival at SEA is after sunset there (6:27 pm PDT (01:27 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

Radar now, the southern Plains · loop National Weather Service

Radar now, the southern Rockies · loop National Weather Service

Radar now, the Pacific Northwest · loop National Weather Service

Radar, the whole country · loop National Weather Service

Surface analysis now Weather Prediction Center

Forecast chart, 12 hours ahead Weather Prediction Center

Forecast chart, 24 hours ahead Weather Prediction Center

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, Seattle-Tacoma International.