Plan a flight · Sun 8:10 pm CDT (01:10 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 13 h 19 min at the quickest height in today's winds (4,500 ft, a 7-knot headwind), arriving about 7:29 am PDT (14:29 UTC). Right now STL is VFR, wind from the southeast (130°) at 7 knots; SFO is VFR, wind from the west-southwest (240°) at 13 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

AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 598 to 1205 nm out.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 648 to 1126 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 737 to 1205 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 757 to 1006 nm out.
AIRMET ZULU 3C: moderate icing up to 22,000 ft. Over the route from 897 to 1245 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). Near the route, 996 nm along the route.
AIRMET TANGO 3W: moderate turbulence below 18,000 ft (due to mountain wave) up to 15,000 ft. Over the route from 1156 to 1385 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 STL.

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

UAL2199 at 35,000 ft, 46 nm north, 6:31 pm CDT (23:31 UTC): moderate chop turbulence, wind 247° at 79 knots. 618 nm along the route, 46 nm north of the line.
as filed, and in English
```
ARP UAL2199 4007N 10337W 2331 F350 247/079KT TB MOD CHOP IC
```
Report
a routine report filed through ARP
GLF5 at 45,000 ft, 7 nm south, 5:44 pm CDT (22:44 UTC): moderate turbulence, remarks: ZDVWC-46. 667 nm along the route, 7 nm south of the line.
as filed, and in English
```
COS UA /OV COS350025/TM 2244/FL450/TP GLF5/TB MOD /RM ZDVWC-46
```
Report
a routine report filed through COS
Where
25 nm north (350°) of COS
Time
22:44 UTC
Height
at 45,000 ft
Aircraft
GLF5
Turbulence
moderate
Remarks
ZDVWC-46
C650 at 40,000 ft, 10 nm north, 6:48 pm CDT (23:48 UTC): moderate turbulence, remarks: ZDVWC-03. 767 nm along the route, 10 nm north of the line.
as filed, and in English
```
ASE UA /OV DBL/TM 2348/FL400/TP C650/TB MOD /RM ZDVWC-03
```
Report
a routine report filed through ASE
Where
over DBL
Time
23:48 UTC
Height
at 40,000 ft
Aircraft
C650
Turbulence
moderate
Remarks
ZDVWC-03
C680A at 16,000 ft, 4 nm southwest, 5:59 pm CDT (22:59 UTC): moderate turbulence, scattered clouds above 16,000 ft, remarks: during the descent. 767 nm along the route, 4 nm southwest of the line.
as filed, and in English
```
ASE UA /OV HAERI/TM 2259/FL160/TP C680A/SK SCT160/TB CONS MOD/RM DURD
```
Report
a routine report filed through ASE
Where
haeri
Time
22:59 UTC
Height
at 16,000 ft
Aircraft
C680A
Sky
scattered clouds from 16,000 ft
Turbulence
continuous moderate
Remarks
during the descent
C680 at 18,000 ft, 13 nm south, 5:35 pm CDT (22:35 UTC): moderate turbulence, remarks: from 18,000 ft to 10,000 ft. 787 nm along the route, 13 nm south of the line.
as filed, and in English
```
ASE UA /OV ASE230020/TM 2235/FL180/TP C680/TB MOD/RM 180-100
```
Report
a routine report filed through ASE
Where
20 nm southwest (230°) of ASE
Time
22:35 UTC
Height
at 18,000 ft
Aircraft
C680
Turbulence
moderate
Remarks
from 18,000 ft to 10,000 ft
E170 at 10,000 ft, 13 nm south, 6:41 pm CDT (23:41 UTC): moderate turbulence up to 10,000 ft, remarks: during the climb. 847 nm along the route, 13 nm south 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
E75L at 18,000 ft, 43 nm south, 6:24 pm CDT (23:24 UTC): moderate turbulence from 18,000 ft to 22,000 ft, remarks: mountain wave a 10-knot loss of airspeed entered by zoa fdcs. 1325 nm along the route, 43 nm south of the line.
as filed, and in English
```
LOL UA /OV BIH300011/TM 2324/FL 180/TP E75L/TB MOD 180-220/RM MTN WAVE /-10 ENTERED BY ZOA FDCS AWC-WEB
```
Report
a routine report filed through LOL
Where
11 nm northwest (300°) of BIH
Time
23:24 UTC
Height
at 18,000 ft
Aircraft
E75L
Turbulence
moderate from 18,000 ft to 22,000 ft
Remarks
mountain wave a 10-knot loss of airspeed entered by zoa fdcs
A320 at 8,000 ft, 29 nm north, 6:42 pm CDT (23:42 UTC): light chop turbulence from 8,000 ft to 16,000 ft, remarks: during the climb. 638 nm along the route, 29 nm north of the line.
as filed, and in English
```
DEN UA /OV DEN080030/TM 2342/FL080/TP A320/TB LGT CHOP 080-160/RM DURC
```
Report
a routine report filed through DEN
Where
30 nm east (080°) of DEN
Time
23:42 UTC
Height
at 8,000 ft
Aircraft
A320
Turbulence
light chop from 8,000 ft to 16,000 ft
Remarks
during the climb
A321 descending, 28 nm north, 7:26 pm CDT (00:26 UTC): no turbulence up to 10,000 ft. 667 nm along the route, 28 nm north of the line.
as filed, and in English
```
DEN UA /OV DEN/TM 0026/FLDURD/TP A321/TB NEG BLO 100
```
Report
a routine report filed through DEN
Where
over DEN
Time
00:26 UTC
Height
during the descent
Aircraft
A321
Turbulence
no below 10,000 ft
B737 at 14,000 ft, 4 nm northeast, 7:20 pm CDT (00:20 UTC): light to moderate turbulence, remarks: light to moderate from 14,000 ft to 16,000 ft occn light above 16,000 ft. 667 nm along the route, 4 nm northeast of the line.
as filed, and in English
```
DEN UA /OV DEN170025/TM 0020/FL140/TP B737/TB LGT-MOD/RM LGT-MOD 140-160 OCCN LGT ABOVE 160
```
Report
a routine report filed through DEN
Where
25 nm south (170°) of DEN
Time
00:20 UTC
Height
at 14,000 ft
Aircraft
B737
Turbulence
light to moderate
Remarks
light to moderate from 14,000 ft to 16,000 ft occn light above 16,000 ft
B737 at 6,500 ft, 28 nm north, 6:27 pm CDT (23:27 UTC): no turbulence. 667 nm along the route, 28 nm north of the line.
as filed, and in English
```
DEN UA /OV DEN/TM 2327/FL065/TP B737/TB NEG TB ON FINAL RWY17R
```
Report
a routine report filed through DEN
Where
over DEN
Time
23:27 UTC
Height
at 6,500 ft
Aircraft
B737
Turbulence
no turbulence on final runway 17R
B737 descending, 28 nm north, 5:29 pm CDT (22:29 UTC): no turbulence up to 10,000 ft. 667 nm along the route, 28 nm north of the line.
as filed, and in English
```
DEN UA /OV DEN/TM 2229/FLDURD/TP B737/TB NEG BLO 100
```
Report
a routine report filed through DEN
Where
over DEN
Time
22:29 UTC
Height
during the descent
Aircraft
B737
Turbulence
no below 10,000 ft
GLF6 at 40,000 ft, 13 nm south, 7:48 pm CDT (00:48 UTC): light to moderate chop turbulence, remarks: ZDVWC-46. 677 nm along the route, 13 nm south of the line.
as filed, and in English
```
COS UA /OV COS340020/TM 0048/FL400/TP GLF6/TB LGT-MOD CHOP/RM ZDVWC-46
```
Report
a routine report filed through COS
Where
20 nm north (340°) of COS
Time
00:48 UTC
Height
at 40,000 ft
Aircraft
GLF6
Turbulence
light to moderate chop
Remarks
ZDVWC-46
B737 at 25,000 ft, 29 nm south, 7:29 pm CDT (00:29 UTC): light rime icing, 0 °C, remarks: during the climb ZDVWC-29. 677 nm along the route, 29 nm south of the line.
as filed, and in English
```
COS UA /OV BRK242015/TM 0029/FL250/TP B737/SK TOP280/TA 00/IC LGT RIME/RM DURC ZDVWC-29
```
Report
a routine report filed through COS
Where
15 nm southwest (242°) of BRK
Time
00:29 UTC
Height
at 25,000 ft
Aircraft
B737
Sky
TOP280
Temperature
0 °C
Icing
light rime
Remarks
during the climb ZDVWC-29

9 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 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	210° at 20 kt	+7 kt		113 kt	13 h 19 min	7:29 am PDT (14:29 UTC)
6,500 ft	220° at 20 kt	+11 kt	14 °C	109 kt	13 h 48 min	7:58 am PDT (14:58 UTC)
8,500 ft	220° at 24 kt	+15 kt	10 °C	105 kt	14 h 19 min	8:29 am PDT (15:29 UTC)
10,500 ft	220° at 25 kt	+18 kt	6 °C	102 kt	14 h 45 min	8:55 am PDT (15:55 UTC)
12,500 ft	230° at 26 kt	+21 kt	2 °C	99 kt	15 h 12 min	9:22 am PDT (16:22 UTC)
14,500 ft	230° at 28 kt	+24 kt	-2 °C	96 kt	15 h 40 min	9:50 am PDT (16:50 UTC)
16,500 ft	230° at 31 kt	+26 kt	-7 °C	94 kt	16 h	10:10 am PDT (17:10 UTC)
18,000 ft FL180	240° at 32 kt	+28 kt	-10 °C	92 kt	16 h 21 min	10:31 am PDT (17:31 UTC)
24,000 ft FL240	230° at 35 kt	+27 kt	-21 °C	93 kt	16 h 10 min	10:20 am PDT (17:20 UTC)
30,000 ft FL300	240° at 48 kt	+42 kt	-29 °C	78 kt	19 h 17 min	1:27 pm PDT (20:27 UTC)
34,000 ft FL340	240° at 51 kt	+47 kt	-37 °C	73 kt	20 h 36 min	2:46 pm PDT (21:46 UTC)
39,000 ft FL390	250° at 52 kt	+51 kt	-47 °C	69 kt	21 h 48 min	3:58 pm PDT (22:58 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
STL	used from 0 nm out; 25 nm from the line	210/13	260/16 17°	270/21 10°	280/24 5°	310/20 -7°	320/22 -18°	320/44 -33°	320/59 -43°	310/69 -51°
COU	used from 50 nm out; 13 nm from the line	210/16	220/19 15°	240/33 10°	250/29 7°	280/21 -6°	280/19 -18°	300/34 -31°	300/40 -42°	300/60 -52°
MKC	used from 149 nm out; 24 nm from the line	200/28	220/30 16°	270/20 11°	280/22 7°	260/27 -6°	270/27 -18°	280/38 -32°	270/38 -40°	280/50 -52°
SLN	used from 249 nm out; 72 nm from the line	190/37	220/39 20°	240/31 14°	250/24 7°	260/25 -7°	250/26 -17°	250/44 -31°	260/47 -40°	260/47 -50°
GLD	used from 448 nm out; 56 nm from the line		190/29	200/30 15°	240/23 8°	250/39 -7°	230/39 -19°	230/57 -31°	240/67 -39°	250/62 -49°
DEN	used from 598 nm out; 54 nm from the line			190/31 16°	210/32 7°	240/41 -8°	230/47 -21°	240/56 -32°	250/65 -37°	250/61 -47°
GJT	used from 747 nm out; 75 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°
BCE	used from 946 nm out; 91 nm from the line				210/47 0°	200/50 -12°	220/31 -23°	220/56 -26°	220/58 -35°	230/58 -45°
ELY	used from 1046 nm out; 76 nm from the line			210/20 4°	240/21 -1°	230/37 -13°	200/58 -25°	220/73 -27°	220/73 -36°	220/69 -44°
BIH	used from 1245 nm out; 72 nm from the line		L/V	210/14 6°	210/20 -2°	230/26 -14°	220/32 -24°	220/63 -27°	220/56 -35°	230/50 -44°
SAC	used from 1395 nm out; 54 nm from the line	270/5	L/V 5°	L/V -1°	240/11 -5°	250/22 -15°	270/25 -24°	260/31 -27°	240/39 -33°	240/39 -42°
SFO	used from 1445 nm out; 35 nm from the line	220/11	L/V 5°	280/7 1°	270/15 -3°	290/23 -14°	310/29 -24°	280/26 -28°	250/30 -34°	250/36 -43°

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 Sky: a few clouds at 25,000 feet	from the southeast (130°) at 7 knots	10+ mi	none	617 ft	7:51 pm CDT (00:51 UTC)
COU Columbia, MO	90 nm out, 7 nm south of the line, tower	VFR	from the south (180°) at 4 knots	10+ mi	none	889 ft	00:54 UTC
MKC Kansas City, MO	199 nm out, 1 nm northeast of the line, tower	VFR	from the south (170°) at 11 knots, gusting to 19	10+ mi	none	756 ft	00:54 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 (180°) at 13 knots	10+ mi	none	3,657 ft	00:53 UTC
APA Denver, CO	677 nm out, 14 nm north of the line, tower	VFR Sky: a few clouds at 10,000 feet, scattered clouds at 14,000 feet, a broken layer at 22,000 feet	from the south-southwest (200°) at 23 knots, gusting to 31	10+ mi	22,000 ft	5,884 ft	00:53 UTC
ASE Aspen, CO	767 nm out, 4 nm southwest of the line, tower	VFR Sky: a broken layer at 7,500 feet, overcast at 9,000 feet Weather: light rain	from the west-northwest (300°) at 12 knots, gusting to 15	10+ mi	7,500 ft	7,837 ft	00:53 UTC
FOM Fillmore, UT	1026 nm out, 2 nm north of the line	IFR Sky: a broken layer at 600 feet, overcast at 1,900 feet Weather: light rain, mist	from the southwest (230°) at 3 knots	3 mi	600 ft	4,984 ft	00:55 UTC
HTH Hawthorne, NV	1315 nm out, 20 nm northwest of the line	VFR Sky: scattered clouds at 12,000 feet	from the north-northwest (340°) at 17 knots	10+ mi	none	4,230 ft	00:55 UTC
LVK Livermore, CA	1474 nm out, 3 nm southwest of the line, tower	VFR Sky: scattered clouds at 7,500 feet	from the west-northwest (290°) at 11 knots	10+ mi	none	399 ft	00:53 UTC
SFO San Francisco, CA	destination	VFR Sky: a few clouds at 2,000 feet, a few clouds at 5,000 feet	from the west-southwest (240°) at 13 knots	10+ mi	none	13 ft	5:56 pm PDT (00:56 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, 7:29 am PDT (14:29 UTC)

Wind from the south-southeast at 4 knots, visibility more than 6 miles, clear skies VFR

The whole forecast for SFO

From Sun 5:00 pm PDT (00:00 UTC): wind from the west-southwest at 16 knots, visibility more than 6 miles, a few clouds at 2,000 feet
From Sun 7:00 pm PDT (02:00 UTC): wind from the west-southwest at 8 knots, visibility more than 6 miles, a few clouds at 2,000 feet
From Mon 1:00 am PDT (08:00 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 east-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 10 knots, visibility more than 6 miles, clear skies

The forecast for STL, the departure

From Sun 7:00 pm CDT (00:00 UTC): wind from the south at 5 knots, visibility more than 6 miles, clear skies
From Mon 1:00 am CDT (06:00 UTC): wind from the south-southwest at 6 knots, visibility more than 6 miles, a few 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

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
6/8770 COLORADO SPRINGS, CO, Saturday, October 10, 2026 through Monday, October 12, 2026 UTC 20 nm from the route, 677 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 12 October · ZDV
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.