Plan a flight · Sun 10:42 pm PDT (05:42 UTC)

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

1,504 nautical miles (1,731 statute miles) east on a straight line, true course 077°, about 063° magnetic at the departure end (variation 14E). At 120 knots that is 9 h 04 min at the quickest height in today's winds (34,000 ft, a 46-knot tailwind), arriving about 9:46 am CDT (14:46 UTC). Right now SFO is VFR, wind from the south (190°) at 5 knots; STL 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 W14W: thunderstorms (a convective SIGMET) up to 28,000 ft, moving from the southwest at 20 knots, until 11:55 pm PDT (06:55 UTC). Over the route from 189 to 279 nm out.
as issued
```
WSUS33 KKCI 120455
MKCW WST 120455
CONVECTIVE SIGMET 14W
VALID UNTIL 0655Z
NV
FROM 40NW BVL-20WNW ELY-20SSE OAL-40WNW OAL-50NE BAM-40NW BVL
AREA TS MOV FROM 24020KT. TOPS TO FL280.
```
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the first 100 nm of the route.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 249 to 707 nm out.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 279 to 628 nm out.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 309 to 917 nm out.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 38,000 ft. Over the route from 498 to 917 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 657 to 817 nm out.
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 926 to 1405 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 SFO.

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, 9:30 pm PDT (04:30 UTC): remarks: low-level wind shear + 20K 1000-1500 above ground on approach. 737 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, 9:52 pm PDT (04:52 UTC): moderate turbulence, moderate rime icing, -15 °C, remarks: entered by zoa fdcs. 219 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
UAL2479 at 36,000 ft, 4 nm south, 8:11 pm PDT (03:11 UTC): no turbulence, wind 231° at 49 knots. 687 nm along the route, 4 nm south of the line.
as filed, and in English
```
ARP UAL2479 3910N 10753W 0311 F360 231/049KT TB SMTH IC
```
Report
a routine report filed through ARP
BE20 at 16,000 ft, 17 nm north, 8:28 pm PDT (03:28 UTC): light chop turbulence, light rime icing, -3 °C, remarks: ZDVWC-11. 697 nm along the route, 17 nm north of the line.
as filed, and in English
```
RIL UA /OV RIL/TM 0328/FL160/TP BE20/TA M03/TB LGT CHOP/IC LGT RIME/RM ZDVWC-11
```
Report
a routine report filed through RIL
Where
over RIL
Time
03:28 UTC
Height
at 16,000 ft
Aircraft
BE20
Temperature
−3 °C
Turbulence
light chop
Icing
light rime
Remarks
ZDVWC-11
B733 at 20,000 ft, 49 nm south, 8:16 pm PDT (03:16 UTC): light chop turbulence up to 20,000 ft, clear from 20,000 ft to 60,000 ft, remarks: during the climb ZDVWC-12. 727 nm along the route, 49 nm south of the line.
as filed, and in English
```
GUC UA /OV HBU/TM 0316/FL200/TP B733/SK SKC/TB OCNL LGT CHOP BLO 200/RM DURC ZDVWC-12
```
Report
a routine report filed through GUC
Where
over HBU
Time
03:16 UTC
Height
at 20,000 ft
Aircraft
B733
Sky
clear
Turbulence
occasional light chop below 20,000 ft
Remarks
during the climb ZDVWC-12
E170 at 22,500 ft, 12 nm south, 10:06 pm PDT (05:06 UTC): light to moderate turbulence up to 23,000 ft, remarks: during the descent tbarr star ZDVWC-13. 797 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
A320 descending, 28 nm north, 8:19 pm PDT (03:19 UTC): no turbulence up to 10,000 ft. 837 nm along the route, 28 nm north of the line.
as filed, and in English
```
DEN UA /OV DEN/TM 0319/FLDURD/TP A320/TB NEG BLO 100
```
Report
a routine report filed through DEN
Where
over DEN
Time
03:19 UTC
Height
during the descent
Aircraft
A320
Turbulence
no below 10,000 ft

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 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 13 forecast points nearest it (SFO, SAC, FAT, BIH, ELY, BCE, GJT, DEN, GLD, SLN, MKC, COU, STL). 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 27 kt	−20 kt		140 kt	10 h 45 min	11:27 am CDT (16:27 UTC)
7,500 ft	220° at 27 kt	−19 kt	9 °C	139 kt	10 h 49 min	11:31 am CDT (16:31 UTC)
9,500 ft	230° at 25 kt	−18 kt	8 °C	138 kt	10 h 54 min	11:36 am CDT (16:36 UTC)
11,500 ft	230° at 23 kt	−19 kt	3 °C	139 kt	10 h 49 min	11:31 am CDT (16:31 UTC)
13,500 ft	230° at 24 kt	−20 kt	-1 °C	140 kt	10 h 45 min	11:27 am CDT (16:27 UTC)
15,500 ft	230° at 26 kt	−21 kt	-5 °C	141 kt	10 h 40 min	11:22 am CDT (16:22 UTC)
17,500 ft	230° at 28 kt	−22 kt	-9 °C	142 kt	10 h 35 min	11:17 am CDT (16:17 UTC)
18,000 ft FL180	230° at 29 kt	−23 kt	-10 °C	143 kt	10 h 31 min	11:13 am CDT (16:13 UTC)
24,000 ft FL240	230° at 36 kt	−29 kt	-21 °C	149 kt	10 h 06 min	10:48 am CDT (15:48 UTC)
30,000 ft FL300	230° at 48 kt	−41 kt	-30 °C	161 kt	9 h 20 min	10:02 am CDT (15:02 UTC)
34,000 ft FL340	240° at 51 kt	−46 kt	-36 °C	166 kt	9 h 04 min	9:46 am CDT (14:46 UTC)
39,000 ft FL390	240° at 48 kt	−45 kt	-46 °C	165 kt	9 h 07 min	9:49 am CDT (14:49 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
SFO	used from 0 nm out; 25 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°
SAC	used from 50 nm out; 49 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°
FAT	used from 100 nm out; 76 nm from the line	130/16	160/20 5°	190/28 -1°	210/25 -5°	220/27 -15°	230/21 -26°	220/42 -29°	220/44 -35°	220/44 -44°
BIH	used from 149 nm out; 53 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°
ELY	used from 249 nm out; 99 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°
BCE	used from 448 nm out; 74 nm from the line				220/27 -1°	210/40 -13°	220/54 -21°	220/64 -30°	220/64 -34°	220/52 -44°
GJT	used from 548 nm out; 85 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°
DEN	used from 747 nm out; 73 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°
GLD	used from 897 nm out; 54 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°
SLN	used from 1096 nm out; 52 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°
MKC	used from 1245 nm out; 36 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°
COU	used from 1345 nm out; 49 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°
STL	used from 1445 nm out; 35 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°

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
SFO San Francisco, CA	departure	VFR Sky: a few clouds at 2,000 feet	from the south (190°) at 5 knots	10+ mi	none	13 ft	9:56 pm PDT (04:56 UTC)
LVK Livermore, CA	30 nm out, 3 nm southwest of the line, tower	VFR Sky: a few clouds at 8,000 feet	from the west-northwest (290°) at 5 knots	10+ mi	none	399 ft	04:53 UTC
HTH Hawthorne, NV	189 nm out, 20 nm northwest of the line	low IFR Sky: a broken layer at 300 feet, a broken layer at 2,200 feet, a broken layer at 2,700 feet Weather: haze	from the north-northwest (330°) at 11 knots	2 mi	300 ft	4,230 ft	05:35 UTC
FOM Fillmore, UT	478 nm out, 2 nm north of the line	VFR Sky: a broken layer at 11,000 feet	from the south (170°) at 3 knots	10+ mi	11,000 ft	4,984 ft	05:15 UTC
ASE Aspen, CO	737 nm out, 4 nm southwest of the line, tower	VFR Sky: a broken layer at 8,000 feet, a broken layer at 10,000 feet	from the southwest (230°) at 3 knots	10+ mi	8,000 ft	7,837 ft	04:53 UTC
APA Denver, CO	827 nm out, 14 nm north of the line, tower	VFR Sky: a few clouds at 14,000 feet, scattered clouds at 22,000 feet	from the south-southwest (200°) at 12 knots, gusting to 24	10+ mi	none	5,884 ft	04:53 UTC
GLD Goodland, KS	976 nm out, 1 nm northwest of the line	VFR	from the south (180°) at 15 knots, gusting to 23	10+ mi	none	3,657 ft	04:53 UTC
RCP Stockton, KS	1086 nm out, 1 nm north of the line	no report just now				1,999 ft
MKC Kansas City, MO	1305 nm out, 1 nm northeast of the line, tower	VFR	from the south (190°) at 11 knots, gusting to 20	10+ mi	none	756 ft	04:54 UTC
COU Columbia, MO	1415 nm out, 7 nm south of the line, tower	VFR	from the south (180°) at 7 knots	10+ mi	none	889 ft	04:54 UTC
STL St Louis, MO	destination	VFR Sky: a few clouds at 25,000 feet	from the south (180°) at 8 knots	10+ mi	none	617 ft	11:51 pm CDT (04:51 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 STL when you get there the forecast at the estimated arrival, 9:46 am CDT (14:46 UTC)

Wind from the south-southwest at 7 knots, visibility more than 6 miles, scattered clouds at 25,000 feet VFR

The whole forecast for STL

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

The forecast for SFO, the departure

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

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

6/7231 Santa Clara, CA, Sunday, October 11, 2026 through Monday, October 12, 2026 UTC 16 nm from the route, at the departure end · drones kept away from a public gathering · until 12 October · ZOA
6/7094 45NM NE MERCED, CA, Sunday, October 4, 2026 through Tuesday, October 20, 2026 UTC 20 nm from the route, 120 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 20 October · ZOA
6/8784 LAKE GEORGE, CO, Sunday, October 11, 2026 through Tuesday, October 13, 2026 UTC 19 nm from the route, 797 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 13 October · ZDV
6/7634 CENTRALIA, MO, Monday, October 12, 2026 UTC 13 nm from the route, 1415 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · today · ZKC

Daylight

Sunset at SFO 6:36 pm PDT (01:36 UTC), at STL 6:27 pm CDT (23:27 UTC) (civil twilight ends 6:54 pm CDT (23:54 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 Southwest · 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: San Francisco International, St. Louis Lambert International.