Plan a flight · Sun 6:48 pm PDT (01:48 UTC)

Seattle-Tacoma International to San Antonio International SEA → SAT

1,541 nautical miles (1,774 statute miles) southeast on a straight line, true course 126°, about 110° magnetic at the departure end (variation 16E). At 120 knots that is 11 h 25 min at the quickest height in today's winds (39,000 ft, a 15-knot tailwind), arriving about 8:13 am CDT (13:13 UTC). Right now SEA is VFR, wind from the north (350°) at 11 knots; SAT is VFR, wind from the south-southeast (150°) at 11 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 1W: thunderstorms (a convective SIGMET) up to 34,000 ft, moving from the southwest at 40 knots, until 7:55 pm PDT (02:55 UTC). Over the route from 746 to 1034 nm out.

as issued

WSUS33 KKCI 120055
MKCW WST 120055
CONVECTIVE SIGMET 1W
VALID UNTIL 0255Z
CO NM WY AZ UT
FROM 40NNW CHE-40WNW TBE-60WNW CME-40N SJN-40ESE MTU-40NNW CHE
AREA SEV TS MOV FROM 23040KT. TOPS TO FL340.
WIND GUSTS TO 60KT POSS.

AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the first 149 nm of the route.
AIRMET ZULU 2C: moderate icing up to 16,000 ft. Over the route from 109 to 249 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 169 to 766 nm out.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 318 to 984 nm out.
AIRMET ZULU 3C: moderate icing up to 22,000 ft. Over the route from 328 to 776 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). Near the route, 487 nm along the route.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 567 to 1104 nm out.
AIRMET SIERRA 2E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the route from 617 to 686 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). Over the route from 686 to 955 nm out.
AIRMET TANGO 5W: strong surface winds (30 knots or more) (due to sustained surface winds greater than 30 knots). Near the route, 696 nm along the route.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 855 to 1014 nm out.
AIRMET TANGO 2W: moderate turbulence above 18,000 ft from 35,000 ft to 45,000 ft. Over the route from 1014 to 1094 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 SEA.

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

urgent BCS3 at 5,400 ft, 43 nm southwest, 4:35 pm PDT (23:35 UTC): remarks: wind shear 10 knots gain 1000 above ground on final. 626 nm along the route, 43 nm southwest of the line.
as filed, and in English
```
PVU UUA /OV PVU310001/TM 2335/FL054/TP BCS3/RM WIND SHEAR 10 KT GAIN 1000 AGL ON FINAL
```
Report
an urgent report filed through PVU
Where
1 nm northwest (310°) of PVU
Time
23:35 UTC
Height
at 5,400 ft
Aircraft
BCS3
Remarks
wind shear 10 knots gain 1000 above ground on final
A339 at 16,000 ft, 5 nm northwest, 4:35 pm PDT (23:35 UTC): moderate chop turbulence up to 16,000 ft, remarks: during the climb zlc. 587 nm along the route, 5 nm northwest of the line.
as filed, and in English
```
OGD UA /OV OGD063012/TM 2335/FL160/TP A339/TB MOD CHOP 160 BLO/RM DURC /ZLC
```
Report
a routine report filed through OGD
Where
12 nm northeast (063°) of OGD
Time
23:35 UTC
Height
at 16,000 ft
Aircraft
A339
Turbulence
moderate chop at 16,000 ft below
Remarks
during the climb zlc
E75L at 14,500 ft, 8 nm west, 4:05 pm PDT (23:05 UTC): moderate turbulence up to 15,800 ft, heavy rain, remarks: during the climb zlc. 587 nm along the route, 8 nm west of the line.
as filed, and in English
```
OGD UA /OV OGD086008/TM 2305/FL145/TP E75L/WX +RA/TB MOD 158 BLO/RM DURC /ZLC
```
Report
a routine report filed through OGD
Where
8 nm east (086°) of OGD
Time
23:05 UTC
Height
at 14,500 ft
Aircraft
E75L
Weather
heavy rain
Turbulence
moderate at 15,800 ft below
Remarks
during the climb zlc
PA44 at 6,000 ft, 43 nm southwest, 4:25 pm PDT (23:25 UTC): moderate turbulence, remarks: runway in sight at at 6,400 ft. 626 nm along the route, 43 nm southwest of the line.
as filed, and in English
```
PVU UA /OV PVU310002/TM 2325/FL060/TP PA44/TB MOD /RM RWY IN SIGHT AT 064
```
Report
a routine report filed through PVU
Where
2 nm northwest (310°) of PVU
Time
23:25 UTC
Height
at 6,000 ft
Aircraft
PA44
Turbulence
moderate
Remarks
runway in sight at at 6,400 ft
E75L at 22,000 ft, 32 nm southwest, 6:04 pm PDT (01:04 UTC): moderate turbulence. 666 nm along the route, 32 nm southwest of the line.
as filed, and in English
```
PUC UA /OV PUC320020/TM 0104/FL220/TP E75L/TB MOD /ZLC
```
Report
a routine report filed through PUC
Where
20 nm northwest (320°) of PUC
Time
01:04 UTC
Height
at 22,000 ft
Aircraft
E75L
Turbulence
moderate zlc
S22T at 14,000 ft, 26 nm southwest, 6:23 pm PDT (01:23 UTC): moderate rime icing, -16 °C. 676 nm along the route, 26 nm southwest of the line.
as filed, and in English
```
PUC UA /OV PUC360015/TM 0123/FL140/TP S22T/TA M16/IC MOD RIME /ZLC
```
Report
a routine report filed through PUC
Where
15 nm north (360°) of PUC
Time
01:23 UTC
Height
at 14,000 ft
Aircraft
S22T
Temperature
−16 °C
Icing
moderate rime zlc
E170 at 10,000 ft, 11 nm northeast, 4:41 pm PDT (23:41 UTC): moderate turbulence up to 10,000 ft, remarks: during the climb. 786 nm along the route, 11 nm northeast of the line.
as filed, and in English
```
GJT UA /OV GJT144009/TM 2341/FL100/TP E170/TB MOD SFC-100/RM DURC
```
Report
a routine report filed through GJT
Where
9 nm southeast (144°) of GJT
Time
23:41 UTC
Height
at 10,000 ft
Aircraft
E170
Turbulence
moderate from the surface to 10,000 ft
Remarks
during the climb
GLF4 at 43,000 ft, 31 nm southwest, 5:09 pm PDT (00:09 UTC): moderate chop turbulence, remarks: ZDVWC-38. 875 nm along the route, 31 nm southwest of the line.
as filed, and in English
```
FMN UA /OV RSK360050/TM 0009/FL430/TP GLF4/TB MOD CHOP/RM ZDVWC-38
```
Report
a routine report filed through FMN
Where
50 nm north (360°) of RSK
Time
00:09 UTC
Height
at 43,000 ft
Aircraft
GLF4
Turbulence
moderate chop
Remarks
ZDVWC-38
UAL2238 at 38,000 ft, 28 nm northeast, 4:44 pm PDT (23:44 UTC): moderate turbulence, wind 244° at 64 knots. 885 nm along the route, 28 nm northeast of the line.
as filed, and in English
```
ARP UAL2238 3807N 10649W 2344 F380 244/064KT TB CONT MOD TURB IC
```
Report
a routine report filed through ARP
PC12 at 15,000 ft, 12 nm southwest, 5:42 pm PDT (00:42 UTC): remarks: zse. At the departure end, 12 nm southwest of the line.
as filed, and in English
```
YKM UA /OV YKM270050/TM 0042/FL150/TP PC12/SK TOP130/RM -ZSE
```
Report
a routine report filed through YKM
Where
50 nm west (270°) of YKM
Time
00:42 UTC
Height
at 15,000 ft
Aircraft
PC12
Sky
TOP130
Remarks
zse
PC12 at 13,000 ft, 12 nm southwest, 5:42 pm PDT (00:42 UTC): remarks: zse. At the departure end, 12 nm southwest of the line.
as filed, and in English
```
YKM UA /OV YKM270050/TM 0042/FL130/TP PC12/SK TOP130/RM -ZSE
```
Report
a routine report filed through YKM
Where
50 nm west (270°) of YKM
Time
00:42 UTC
Height
at 13,000 ft
Aircraft
PC12
Sky
TOP130
Remarks
zse
C337 at 12,000 ft, 13 nm southwest, 6:18 pm PDT (01:18 UTC): light rime icing, -12 °C, remarks: zse. 109 nm along the route, 13 nm southwest of the line.
as filed, and in English
```
YKM UA /OV YKM155020/TM 0118/FL120/TP C337/TA M12/IC LGT RIME/RM ZSE
```
Report
a routine report filed through YKM
Where
20 nm southeast (155°) of YKM
Time
01:18 UTC
Height
at 12,000 ft
Aircraft
C337
Temperature
−12 °C
Icing
light rime
Remarks
zse
PC12 at 13,500 ft, 45 nm northeast, 6:08 pm PDT (01:08 UTC): no turbulence, a trace of icing, overcast from 9,000 ft to 13,500 ft, -10 °C. 139 nm along the route, 45 nm northeast of the line.
as filed, and in English
```
PSC UA /OV PSC360025/TM 0108/FL135/TP PC12/SK OVC090-TOP135/TA M10/TB NEG /IC TRACE RM 135-090
```
Report
a routine report filed through PSC
Where
25 nm north (360°) of PSC
Time
01:08 UTC
Height
at 13,500 ft
Aircraft
PC12
Sky
overcast from 9,000 ft, tops 13,500 ft
Temperature
−10 °C
Turbulence
none
Icing
trace remarks from 13,500 ft to 9,000 ft
C210 at 9,000 ft, 36 nm southwest, 3:51 pm PDT (22:51 UTC): light rime icing, -13 °C, remarks: base 080-ZSE. 159 nm along the route, 36 nm southwest of the line.
as filed, and in English
```
PDT UA /OV PDT230040/TM 2251/FL090/TP C210/TA M13/IC LGT RIME/RM BASE 080-ZSE
```
Report
a routine report filed through PDT
Where
40 nm southwest (230°) of PDT
Time
22:51 UTC
Height
at 9,000 ft
Aircraft
C210
Temperature
−13 °C
Icing
light rime
Remarks
base 080-ZSE

16 more routine reports are on the map.

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 12 forecast points nearest it (SEA, YKM, LWS, BOI, PIH, SLC, GJT, ALS, TCC, 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	200° at 5 kt	+3 kt	12 °C	117 kt	13 h 10 min	9:58 am CDT (14:58 UTC)
7,500 ft	210° at 11 kt	+4 kt	7 °C	116 kt	13 h 17 min	10:05 am CDT (15:05 UTC)
9,500 ft	210° at 15 kt	+4 kt	4 °C	116 kt	13 h 17 min	10:05 am CDT (15:05 UTC)
11,500 ft	210° at 20 kt	+4 kt	1 °C	116 kt	13 h 17 min	10:05 am CDT (15:05 UTC)
13,500 ft	220° at 23 kt	+4 kt	-3 °C	116 kt	13 h 17 min	10:05 am CDT (15:05 UTC)
15,500 ft	220° at 25 kt	+4 kt	-7 °C	116 kt	13 h 17 min	10:05 am CDT (15:05 UTC)
17,500 ft	220° at 27 kt	+3 kt	-11 °C	117 kt	13 h 10 min	9:58 am CDT (14:58 UTC)
18,000 ft FL180	220° at 28 kt	+3 kt	-12 °C	117 kt	13 h 10 min	9:58 am CDT (14:58 UTC)
24,000 ft FL240	220° at 30 kt	+1 kt	-21 °C	119 kt	12 h 57 min	9:45 am CDT (14:45 UTC)
30,000 ft FL300	230° at 41 kt	−3 kt	-31 °C	123 kt	12 h 32 min	9:20 am CDT (14:20 UTC)
34,000 ft FL340	240° at 46 kt	−11 kt	-37 °C	131 kt	11 h 46 min	8:34 am CDT (13:34 UTC)
39,000 ft FL390	240° at 45 kt	−15 kt	-46 °C	135 kt	11 h 25 min	8:13 am CDT (13:13 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
SEA	used from 0 nm out; 25 nm from the line	360/9	350/10 1°	010/10 -5°	030/20 -11°	020/60 -17°	010/86 -26°	360/90 -40°	010/68 -42°	360/31 -43°
YKM	used from 50 nm out; 15 nm from the line	030/16	020/18 0°	030/30 -8°	030/23 -13°	020/40 -23°	010/73 -29°	010/54 -36°	360/29 -37°	330/16 -40°
LWS	used from 199 nm out; 83 nm from the line	010/5	050/14 -2°	040/12 -6°	160/7 -10°	190/30 -22°	200/54 -27°	200/48 -35°	210/40 -37°	230/32 -41°
BOI	used from 249 nm out; 77 nm from the line		330/14 4°	230/5 -2°	220/20 -7°	210/37 -20°	200/59 -26°	200/67 -34°	210/73 -35°	220/62 -41°
PIH	used from 447 nm out; 52 nm from the line		270/10	270/13 1°	210/16 -2°	200/56 -11°	200/51 -23°	200/68 -33°	220/77 -37°	230/73 -44°
SLC	used from 547 nm out; 36 nm from the line		280/8	210/39 5°	210/52 -1°	200/50 -11°	200/56 -23°	220/61 -28°	230/73 -37°	230/73 -45°
GJT	used from 696 nm out; 61 nm from the line			210/40 11°	210/46 3°	210/61 -10°	210/68 -22°	220/57 -29°	230/59 -36°	240/66 -46°
ALS	used from 845 nm out; 78 nm from the line				210/32 5°	230/48 -8°	230/49 -20°	230/78 -30°	240/74 -36°	240/61 -47°
TCC	used from 1044 nm out; 51 nm from the line		200/26	200/28 14°	220/25 7°	230/28 -7°	240/41 -19°	240/62 -28°	250/61 -37°	250/49 -49°
LBB	used from 1193 nm out; 36 nm from the line		180/26 20°	210/21 13°	230/21 7°	250/25 -5°	250/34 -16°	250/52 -28°	260/47 -38°	260/49 -50°
ABI	used from 1293 nm out; 80 nm from the line		180/26 17°	220/18 12°	230/25 8°	230/28 -5°	240/29 -14°	250/35 -28°	270/37 -39°	280/37 -51°
SAT	used from 1442 nm out; 75 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°

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
SEA Seattle, WA	departure	VFR Sky: a few clouds at 5,000 feet	from the north (350°) at 11 knots	10+ mi	none	432 ft	5:53 pm PDT (00:53 UTC)
YKM Yakima, WA	89 nm out, 0 nm northeast of the line, tower	VFR Sky: overcast at 9,000 feet	calm	10+ mi	9,000 ft	1,098 ft	00:53 UTC
PDT Pendleton, OR	179 nm out, 2 nm north of the line, tower	VFR Sky: overcast at 6,000 feet	from the north-northeast (030°) at 3 knots	10+ mi	6,000 ft	1,494 ft	00:53 UTC
JER Jerome, ID	438 nm out, 14 nm southwest of the line	VFR Sky: overcast at 4,400 feet	from the south-southwest (200°) at 5 knots	10+ mi	4,400 ft	4,053 ft	00:53 UTC
OGD Ogden, UT	577 nm out, 9 nm southwest of the line, tower	VFR Sky: overcast at 6,000 feet Weather: light rain	from the east (090°) at 8 knots	9 mi	6,000 ft	4,472 ft	00:53 UTC
HCR Heber, UT	626 nm out, 22 nm southwest of the line	VFR Sky: a broken layer at 5,500 feet, overcast at 7,500 feet Weather: light rain	from the south-southwest (210°) at 12 knots, gusting to 17	8 mi	5,500 ft	5,636 ft	23:35 UTC
GJT Grand Junction, CO	786 nm out, 14 nm northeast of the line, tower	VFR Sky: a few clouds at 12,000 feet	from the southeast (140°) at 13 knots, gusting to 23	10+ mi	none	4,861 ft	00:53 UTC
SKX Taos, NM	994 nm out, 4 nm northwest of the line	no report just now				7,094 ft
LLN Levelland, TX	1233 nm out, 6 nm north of the line	VFR	from the south-southeast (150°) at 10 knots, gusting to 16	10+ mi	none	3,514 ft	01:35 UTC
BFE Brownfield, TX	1253 nm out, 6 nm southwest of the line	no report just now				3,264 ft
SJT San Angelo, TX	1392 nm out, 11 nm southwest of the line, tower	VFR	from the south (170°) at 9 knots	10+ mi	none	1,918 ft	00:51 UTC
SAT San Antonio, TX	destination	VFR Sky: a few clouds at 20,000 feet	from the south-southeast (150°) at 11 knots	10+ mi	none	809 ft	7:51 pm CDT (00:51 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 SAT when you get there the forecast at the estimated arrival, 8:13 am CDT (13:13 UTC)

Wind from the east-southeast at 5 knots, visibility more than 6 miles, a broken layer at 1,200 feet marginal VFR

The whole forecast for SAT

From Sun 7:00 pm CDT (00:00 UTC): wind from the south-southeast at 15 knots, visibility more than 6 miles, a few clouds at 6,000 feet, scattered clouds at 25,000 feet
From Mon 12:00 am CDT (05:00 UTC): wind from the southeast at 9 knots, visibility more than 6 miles, scattered clouds at 1,200 feet
From Mon 6:00 am CDT (11:00 UTC): wind from the east-southeast at 5 knots, visibility more than 6 miles, a broken layer at 1,200 feet
From Mon 12:00 pm CDT (17:00 UTC): wind from the south-southeast at 8 knots, visibility more than 6 miles, a broken layer at 2,500 feet
From Mon 2:00 pm CDT (19:00 UTC): wind from the south at 11 knots, visibility more than 6 miles, a broken layer at 5,000 feet

The forecast for SEA, the departure

From Sun 5:00 pm PDT (00:00 UTC): wind from the north at 12 knots, gusting to 20, visibility more than 6 miles, a few clouds at 2,000 feet, a few clouds at 5,000 feet
From Sun 8:00 pm PDT (03:00 UTC): wind from the northeast at 6 knots, visibility more than 6 miles, clear skies
From Mon 3:00 am PDT (10:00 UTC): wind from the southeast at 4 knots, visibility more than 6 miles, patches of fog, clear skies
From Mon 9:00 am PDT (16:00 UTC): wind from the south-southeast at 4 knots, 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 northwest at 5 knots, visibility more than 6 miles, scattered clouds at 25,000 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, 1402 nm along the route · security · until 1 November · ZFW

Daylight

Sunset at SEA 6:27 pm PDT (01:27 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

Radar now, the Pacific Northwest · loop National Weather Service

Radar now, the southern Rockies · loop National Weather Service

Radar now, the southern Plains · 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: Seattle-Tacoma International, San Antonio International.