Plan a flight · Mon 1:38 am CDT (06:38 UTC)

St. Louis Lambert International to San Francisco International STL → SFO

1,504 nautical miles (1,731 statute miles) west on a straight line, true course 278°, about 279° magnetic at the departure end (variation 1W). At 120 knots that is 14 h 45 min at the quickest height in today's winds (4,500 ft, a 18-knot headwind), arriving about 2:23 pm PDT (21:23 UTC). Right now STL is VFR, wind from the south-southwest (210°) at 7 knots; SFO is VFR, wind from the south (180°) at 8 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: 1,508 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 W15W: thunderstorms (a convective SIGMET) up to 28,000 ft, moving from the southwest at 20 knots, until 2:55 am CDT (07:55 UTC). Over the route from 1185 to 1285 nm out.
as issued
```
WSUS33 KKCI 120555
MKCW WST 120555
CONVECTIVE SIGMET 15W
VALID UNTIL 0755Z
UT NV
FROM 60WNW BVL-10NE BVL-80E OAL-40SE OAL-20W OAL-60WNW BVL
AREA TS MOV FROM 24020KT. TOPS TO FL280.
```
AIRMET TANGO 3W: 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 100 to 578 nm out.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 38,000 ft. Over the route from 588 to 1006 nm out.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 588 to 1195 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 687 to 847 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 797 to 1255 nm out.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 877 to 1225 nm out.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the last 100 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 STL.

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

urgent E75L at 9,000 ft, 4 nm southwest, 11:30 pm CDT (04:30 UTC): remarks: low-level wind shear + 20K 1000-1500 above ground on approach. 767 nm along the route, 4 nm southwest of the line.
as filed, and in English
```
ASE UUA /OV ASE/TM 0430/FL090/TP E75L/RM LLWS +/- 20K 1000-1500 AGL ON APCH
```
Report
an urgent report filed through ASE
Where
over ASE
Time
04:30 UTC
Height
at 9,000 ft
Aircraft
E75L
Remarks
low-level wind shear + 20K 1000-1500 above ground on approach
PC12 at 17,000 ft, 20 nm south, 11:52 pm CDT (04:52 UTC): moderate turbulence, moderate rime icing, -15 °C, remarks: entered by zoa fdcs. 1285 nm along the route, 20 nm south of the line.
as filed, and in English
```
TPH UA /OV OAL/TM 0452/FL 170/TP PC12/TA M15/TB MOD/IC MOD RIME/RM ENTERED BY ZOA FDCS AWC-WEB
```
Report
a routine report filed through TPH
Where
over OAL
Time
04:52 UTC
Height
at 17,000 ft
Aircraft
PC12
Temperature
−15 °C
Turbulence
moderate
Icing
moderate rime
Remarks
entered by zoa fdcs
B738 descending, 28 nm north, 1:15 am CDT (06:15 UTC): light chop turbulence. 667 nm along the route, 28 nm north of the line.
as filed, and in English
```
DEN UA /OV DEN/TM 0615/FLDURD/TP B738/TB LGT CHOP
```
Report
a routine report filed through DEN
Where
over DEN
Time
06:15 UTC
Height
during the descent
Aircraft
B738
Turbulence
light chop
A20N at 25,000 ft, 20 nm north, 1:19 am CDT (06:19 UTC): light chop turbulence up to 26,000 ft, remarks: during the climb ZDVWC-06. 707 nm along the route, 20 nm north of the line.
as filed, and in English
```
DEN UA /OV DEN250045/TM 0619/FL250/TP A20N/TB OCNL LGT CHOP BLO 260/RM DURC. ZDVWC-06
```
Report
a routine report filed through DEN
Where
45 nm west (250°) of DEN
Time
06:19 UTC
Height
at 25,000 ft
Aircraft
A20N
Turbulence
occasional light chop below 26,000 ft
Remarks
during the climb ZDVWC-06
E170 at 22,500 ft, 12 nm south, 12:06 am CDT (05:06 UTC): light to moderate turbulence up to 23,000 ft, remarks: during the descent tbarr star ZDVWC-13. 707 nm along the route, 12 nm south of the line.
as filed, and in English
```
DEN UA /OV DEN216057/TM 0506/FL225/TP E170/TB CONS LGT OCNL MOD BLO 230/RM DURD TBARR STAR. ZDVWC-13
```
Report
a routine report filed through DEN
Where
57 nm southwest (216°) of DEN
Time
05:06 UTC
Height
at 22,500 ft
Aircraft
E170
Turbulence
continuous light occasional moderate below 23,000 ft
Remarks
during the descent tbarr star ZDVWC-13
B738 at 23,000 ft, 2 nm south, 1:23 am CDT (06:23 UTC): no turbulence from 23,000 ft to 26,000 ft, clear from 23,000 ft to 60,000 ft, remarks: during the descent sskii star ZDVWC-06. 717 nm along the route, 2 nm south of the line.
as filed, and in English
```
DEN UA /OV DEN230060/TM 0623/FL230/TP B738/SK SKC/TB NEG 230-260/RM DURD SSKII STAR. ZDVWC-06
```
Report
a routine report filed through DEN
Where
60 nm southwest (230°) of DEN
Time
06:23 UTC
Height
at 23,000 ft
Aircraft
B738
Sky
clear
Turbulence
no from 23,000 ft to 26,000 ft
Remarks
during the descent sskii star ZDVWC-06
E170 at 4,800 ft, 5 nm south, 1:31 am CDT (06:31 UTC): no turbulence, no icing, clear from 4,800 ft to 60,000 ft, remarks: during the descent rnav Y 11 lgjt zdvwc. 847 nm along the route, 5 nm south of the line.
as filed, and in English
```
GJT UA /OV GJT/TM 0631/FL048/TP E170/SK SKC/TB NEG/IC NEG/RM DURD RNAV Y 11 LGJT. ZDVWC-
```
Report
a routine report filed through GJT
Where
over GJT
Time
06:31 UTC
Height
at 4,800 ft
Aircraft
E170
Sky
clear
Turbulence
none
Icing
none
Remarks
during the descent rnav Y 11 lgjt zdvwc
A321 at 31,000 ft, 24 nm south, 1:15 am CDT (06:15 UTC): light to moderate chop turbulence, remarks: mountain wave zlc. 956 nm along the route, 24 nm south of the line.
as filed, and in English
```
CNY UA /OV HVE340015/TM 0615/FL310/TP A321/TB OCNL LGT-MOD CHOP /RM MTN WAVE /ZLC
```
Report
a routine report filed through CNY
Where
15 nm north (340°) of HVE
Time
06:15 UTC
Height
at 31,000 ft
Aircraft
A321
Turbulence
occasional light to moderate chop
Remarks
mountain wave zlc

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 12 forecast points nearest it (STL, COU, MKC, SLN, GLD, DEN, GJT, BCE, ELY, BIH, SAC, SFO). 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 28 kt	+18 kt		102 kt	14 h 45 min	2:23 pm PDT (21:23 UTC)
6,500 ft	230° at 24 kt	+18 kt	14 °C	102 kt	14 h 45 min	2:23 pm PDT (21:23 UTC)
8,500 ft	220° at 24 kt	+18 kt	9 °C	102 kt	14 h 45 min	2:23 pm PDT (21:23 UTC)
10,500 ft	230° at 23 kt	+18 kt	5 °C	102 kt	14 h 45 min	2:23 pm PDT (21:23 UTC)
12,500 ft	230° at 23 kt	+18 kt	2 °C	102 kt	14 h 45 min	2:23 pm PDT (21:23 UTC)
14,500 ft	230° at 25 kt	+20 kt	-3 °C	100 kt	15 h 02 min	2:40 pm PDT (21:40 UTC)
16,500 ft	230° at 27 kt	+21 kt	-7 °C	99 kt	15 h 12 min	2:50 pm PDT (21:50 UTC)
18,000 ft FL180	230° at 28 kt	+22 kt	-11 °C	98 kt	15 h 21 min	2:59 pm PDT (21:59 UTC)
24,000 ft FL240	230° at 37 kt	+29 kt	-21 °C	91 kt	16 h 32 min	4:10 pm PDT (23:10 UTC)
30,000 ft FL300	240° at 48 kt	+41 kt	-30 °C	79 kt	19 h 02 min	6:40 pm PDT (01:40 UTC)
34,000 ft FL340	240° at 51 kt	+46 kt	-36 °C	74 kt	20 h 19 min	7:57 pm PDT (02:57 UTC)
39,000 ft FL390	240° at 48 kt	+44 kt	-46 °C	76 kt	19 h 47 min	7:25 pm PDT (02:25 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
STL	used from 0 nm out; 25 nm from the line	250/24	250/24 16°	260/23 9°	270/16 6°	260/25 -6°	270/29 -19°	290/34 -33°	290/48 -41°	290/54 -51°
COU	used from 50 nm out; 13 nm from the line	230/31	230/30 15°	260/16 11°	270/14 6°	260/24 -6°	270/27 -18°	270/37 -32°	280/49 -41°	290/56 -51°
MKC	used from 149 nm out; 24 nm from the line	220/44	250/28 18°	250/18 13°	240/12 6°	280/24 -6°	240/34 -18°	260/47 -30°	260/51 -40°	270/58 -50°
SLN	used from 249 nm out; 72 nm from the line	210/53	230/41 20°	240/26 14°	230/16 8°	240/25 -7°	240/35 -19°	250/61 -30°	260/65 -38°	260/56 -49°
GLD	used from 448 nm out; 56 nm from the line		230/49	230/42 15°	220/26 8°	240/18 -7°	230/27 -21°	240/62 -30°	240/61 -35°	250/57 -47°
DEN	used from 598 nm out; 54 nm from the line			240/21 14°	250/44 6°	220/49 -8°	220/49 -21°	230/54 -30°	240/57 -35°	240/49 -45°
GJT	used from 747 nm out; 75 nm from the line			210/43 7°	230/45 1°	220/49 -12°	220/62 -22°	220/59 -28°	230/60 -33°	220/55 -45°
BCE	used from 946 nm out; 91 nm from the line				220/27 -1°	210/40 -13°	220/54 -21°	220/64 -30°	220/64 -34°	220/52 -44°
ELY	used from 1046 nm out; 76 nm from the line			200/39 3°	210/27 -2°	210/45 -15°	220/56 -24°	210/60 -28°	210/63 -34°	220/61 -43°
BIH	used from 1245 nm out; 72 nm from the line		L/V	240/7 1°	190/13 -3°	200/26 -16°	210/43 -26°	220/54 -28°	220/51 -35°	220/47 -43°
SAC	used from 1395 nm out; 54 nm from the line	110/6	L/V 4°	010/11 -2°	350/11 -7°	340/24 -16°	360/44 -23°	330/24 -30°	270/21 -35°	230/23 -43°
SFO	used from 1445 nm out; 35 nm from the line	120/13	090/14 5°	040/14 -1°	350/17 -5°	360/42 -14°	360/64 -23°	350/38 -32°	300/19 -37°	250/18 -44°

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
STL St Louis, MO	departure	VFR	from the south-southwest (210°) at 7 knots	10+ mi	none	617 ft	12:51 am CDT (05:51 UTC)
COU Columbia, MO	90 nm out, 7 nm south of the line, tower	VFR	from the south-southwest (200°) at 7 knots	10+ mi	none	889 ft	05:54 UTC
MKC Kansas City, MO	199 nm out, 1 nm northeast of the line, tower	VFR	from the south-southwest (200°) at 16 knots, gusting to 23	10+ mi	none	756 ft	05:54 UTC
RCP Stockton, KS	418 nm out, 1 nm north of the line	no report just now				1,999 ft
GLD Goodland, KS	528 nm out, 1 nm northwest of the line	VFR	from the south (190°) at 16 knots, gusting to 29	10+ mi	none	3,657 ft	05:53 UTC
APA Denver, CO	677 nm out, 14 nm north of the line, tower	VFR Sky: a few clouds at 12,000 feet, scattered clouds at 22,000 feet	from the south (170°) at 9 knots	10+ mi	none	5,884 ft	05:53 UTC
ASE Aspen, CO	767 nm out, 4 nm southwest of the line, tower	VFR Sky: a few clouds at 6,000 feet, a broken layer at 9,000 feet, overcast at 11,000 feet Weather: light rain	from the west (260°) at 4 knots	10+ mi	9,000 ft	7,837 ft	05:53 UTC
FOM Fillmore, UT	1026 nm out, 2 nm north of the line	VFR Sky: a broken layer at 11,000 feet	from the south-southwest (200°) at 10 knots, gusting to 17	10+ mi	11,000 ft	4,984 ft	06:15 UTC
HTH Hawthorne, NV	1315 nm out, 20 nm northwest of the line	marginal VFR Sky: scattered clouds at 1,800 feet, a broken layer at 2,300 feet, a broken layer at 3,200 feet Weather: haze	from the northwest (320°) at 9 knots	4 mi	2,300 ft	4,230 ft	06:15 UTC
LVK Livermore, CA	1474 nm out, 3 nm southwest of the line, tower	VFR	calm	10+ mi	none	399 ft	05:53 UTC
SFO San Francisco, CA	destination	VFR Sky: a few clouds at 2,000 feet	from the south (180°) at 8 knots	10+ mi	none	13 ft	10:56 pm PDT (05:56 UTC)

The highest airport on this list sits at 7,837 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At SFO when you get there the forecast at the estimated arrival, 2:23 pm PDT (21:23 UTC)

Wind from the northeast at 5 knots, visibility more than 6 miles, clear skies VFR

The whole forecast for SFO

From Sun 11:00 pm PDT (06:00 UTC): wind from the south at 6 knots, visibility more than 6 miles, a few clouds at 2,000 feet
From Mon 11:00 am PDT (18:00 UTC): wind from the northeast at 5 knots, visibility more than 6 miles, clear skies
From Mon 3:00 pm PDT (22:00 UTC): wind from the west at 12 knots, visibility more than 6 miles, clear skies
From Mon 8:00 pm PDT (03:00 UTC): wind from the west at 6 knots, visibility more than 6 miles, clear skies

The forecast for STL, the departure

From Mon 1:00 am CDT (06:00 UTC): wind from the south-southwest at 7 knots, visibility more than 6 miles, scattered clouds at 25,000 feet
From Mon 11:00 am CDT (16:00 UTC): wind from the southwest at 12 knots, gusting to 20, visibility more than 6 miles, a few clouds at 25,000 feet
From Mon 6:00 pm CDT (23:00 UTC): wind from the southwest at 8 knots, visibility more than 6 miles, a few clouds at 25,000 feet

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

6/7634 CENTRALIA, MO, Monday, October 12, 2026 UTC 13 nm from the route, 90 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · today · ZKC
6/8784 LAKE GEORGE, CO, Sunday, October 11, 2026 through Tuesday, October 13, 2026 UTC 19 nm from the route, 707 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 13 October · ZDV
6/7094 45NM NE MERCED, CA, Sunday, October 4, 2026 through Tuesday, October 20, 2026 UTC 20 nm from the route, 1385 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 20 October · ZOA
6/7231 Santa Clara, CA, Sunday, October 11, 2026 through Monday, October 12, 2026 UTC 16 nm from the route, at the destination end · drones kept away from a public gathering · until 12 October · ZOA

Daylight

Sunset at STL 6:27 pm CDT (23:27 UTC), at SFO 6:36 pm PDT (01:36 UTC) (civil twilight ends 7:02 pm PDT (02:02 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 upper Mississippi valley · loop National Weather Service

Radar now, the southern Plains · loop National Weather Service

Radar now, the southern Rockies · 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: St. Louis Lambert International, San Francisco International.