San Francisco International to St. Louis Downtown Airport SFO → CPS
1,516 nautical miles (1,744 statute miles) east on a straight line, true course 078°, about 064° magnetic at the departure end (variation 14E). At 120 knots that is 8 h 52 min at the quickest height in today's winds (39,000 ft, a 51-knot tailwind), arriving about 4:12 am CDT (09:12 UTC), after sunset at the destination. 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: 4 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 W72W: thunderstorms (a convective SIGMET) up to 30,000 ft, moving from the southwest at 20 knots, until 6:55 pm PDT (01:55 UTC). Over the route from 189 to 239 nm out.
as issued
WSUS33 KKCI 112355 MKCW WST 112355 CONVECTIVE SIGMET 72W VALID UNTIL 0155Z NV FROM 60SSW BAM-60W ELY-OAL-40WNW OAL-60SSW BAM AREA TS MOV FROM 23020KT. TOPS TO FL300.
- SIGMET W71W: thunderstorms (a convective SIGMET) up to 27,000 ft, moving from the south at 40 knots, until 6:55 pm PDT (01:55 UTC). Near the route, 459 nm along the route.
as issued
WSUS33 KKCI 112355 MKCW WST 112355 CONVECTIVE SIGMET 71W VALID UNTIL 0155Z WY UT ID FROM 40S DBS-40WNW BPI-30WSW MTU-30SSW DTA-30SE TWF-40S DBS AREA EMBD TS MOV FROM 20040KT. TOPS TO FL270.
- SIGMET W68W: thunderstorms (a convective SIGMET) up to 36,000 ft, moving from the southwest at 40 knots, until 6:55 pm PDT (01:55 UTC). Over the route from 578 to 768 nm out.
as issued
WSUS33 KKCI 112355 MKCW WST 112355 CONVECTIVE SIGMET 68W VALID UNTIL 0155Z CO NM AZ UT FROM 30W CHE-20NNW TBE-60SE ABQ-40N SJN-30SW MTU-30W CHE AREA TS MOV FROM 23040KT. TOPS TO FL360.
- AIRMET TANGO 3W: moderate turbulence below 18,000 ft (due to mountain wave) up to 15,000 ft. Over the route from 120 to 349 nm out.
- AIRMET ZULU 3C: moderate icing up to 22,000 ft. Over the route from 259 to 608 nm out.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 299 to 897 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 299 to 768 nm out.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 379 to 858 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 399 to 519 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 499 to 748 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
Not fetched just now.
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 14 forecast points nearest it (SFO, SAC, FAT, BIH, ELY, BCE, GJT, DEN, GLD, GCK, 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 | 210° at 20 kt | −9 kt | 21 °C | 129 kt | 11 h 45 min | 7:05 am CDT (12:05 UTC) |
| 7,500 ft | 210° at 24 kt | −14 kt | 11 °C | 134 kt | 11 h 19 min | 6:39 am CDT (11:39 UTC) |
| 9,500 ft | 220° at 24 kt | −16 kt | 9 °C | 136 kt | 11 h 09 min | 6:29 am CDT (11:29 UTC) |
| 11,500 ft | 230° at 26 kt | −20 kt | 4 °C | 140 kt | 10 h 50 min | 6:10 am CDT (11:10 UTC) |
| 13,500 ft | 230° at 27 kt | −23 kt | 0 °C | 143 kt | 10 h 36 min | 5:56 am CDT (10:56 UTC) |
| 15,500 ft | 230° at 30 kt | −25 kt | -4 °C | 145 kt | 10 h 27 min | 5:47 am CDT (10:47 UTC) |
| 17,500 ft | 230° at 32 kt | −27 kt | -9 °C | 147 kt | 10 h 19 min | 5:39 am CDT (10:39 UTC) |
| 18,000 ft FL180 | 240° at 32 kt | −28 kt | -10 °C | 148 kt | 10 h 15 min | 5:35 am CDT (10:35 UTC) |
| 24,000 ft FL240 | 230° at 35 kt | −28 kt | -21 °C | 148 kt | 10 h 15 min | 5:35 am CDT (10:35 UTC) |
| 30,000 ft FL300 | 240° at 47 kt | −42 kt | -29 °C | 162 kt | 9 h 21 min | 4:41 am CDT (09:41 UTC) |
| 34,000 ft FL340 | 240° at 50 kt | −47 kt | -37 °C | 167 kt | 9 h 05 min | 4:25 am CDT (09:25 UTC) |
| 39,000 ft FL390 | 250° at 52 kt | −51 kt | -47 °C | 171 kt | 8 h 52 min | 4:12 am CDT (09:12 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| SFO | used from 0 nm out; 25 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° |
| SAC | used from 50 nm out; 50 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° |
| FAT | used from 100 nm out; 75 nm from the line | 180/7 | 170/9 7° | 200/20 3° | 210/27 -3° | 240/27 -14° | 230/38 -24° | 220/57 -27° | 230/42 -33° | 230/41 -44° |
| BIH | used from 150 nm out; 52 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° | |
| ELY | used from 249 nm out; 100 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° | ||
| BCE | used from 449 nm out; 71 nm from the line | 210/47 0° | 200/50 -12° | 220/31 -23° | 220/56 -26° | 220/58 -35° | 230/58 -45° | |||
| GJT | used from 548 nm out; 84 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° | ||
| DEN | used from 748 nm out; 74 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° | ||
| GLD | used from 897 nm out; 53 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° | |
| GCK | used from 1047 nm out; 93 nm from the line | 200/35 21° | 220/34 14° | 240/30 8° | 240/27 -6° | 240/31 -17° | 240/53 -30° | 250/55 -39° | 250/60 -50° | |
| SLN | used from 1097 nm out; 48 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° |
| MKC | used from 1246 nm out; 36 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° |
| COU | used from 1346 nm out; 47 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° |
| STL | used from 1446 nm out; 35 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° |
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 | no report just now | 13 ft | ||||
| LVK Livermore, CA | 30 nm out, 3 nm southwest of the line, tower | no report just now | 399 ft | ||||
| TPH Tonopah, NV | 249 nm out, 20 nm south of the line | no report just now | 5,430 ft | ||||
| MLF Milford, UT | 449 nm out, 24 nm south of the line | no report just now | 5,042 ft | ||||
| FOM Fillmore, UT | 479 nm out, 5 nm north of the line | no report just now | 4,984 ft | ||||
| GJT Grand Junction, CO | 658 nm out, 1 nm southwest of the line, tower | no report just now | 4,861 ft | ||||
| APA Denver, CO | 828 nm out, 19 nm north of the line, tower | no report just now | 5,884 ft | ||||
| ITR Burlington, CO | 947 nm out, 1 nm southeast of the line | no report just now | 4,218 ft | ||||
| MHK Manhattan, KS | 1207 nm out, 4 nm northeast of the line, tower | no report just now | 1,066 ft | ||||
| TOP Topeka, KS | 1256 nm out, 2 nm northeast of the line, tower | no report just now | 881 ft | ||||
| COU Columbia, MO | 1416 nm out, 3 nm northeast of the line, tower | no report just now | 889 ft | ||||
| CPS Cahokia/St Louis, IL | destination | no report just now | 412 ft |
The highest airport on this list sits at 5,884 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At CPS when you get there the forecast at the estimated arrival, 4:12 am CDT (09:12 UTC)
CPS has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
- 6/7455 SAN FRANCISCO, CA, Thursday, October 8, 2026 through Sunday, October 11, 2026 Local 10 nm from the route, at the departure end · security · ended 11 October · ZOA
- 6/6741 SAN FRANCISCO, CA, Thursday, October 8, 2026 through Sunday, October 11, 2026 Local 7 nm from the route, at the departure end · air shows/sports · ended 11 October · ZOA
- 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 19 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 14 nm from the route, 798 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 13 October · ZDV
- 6/8770 COLORADO SPRINGS, CO, Saturday, October 10, 2026 through Monday, October 12, 2026 UTC 15 nm from the route, 818 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 12 October · ZDV
- 6/7634 CENTRALIA, MO, Monday, October 12, 2026 UTC 21 nm from the route, 1416 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 CPS 6:28 pm CDT (23:28 UTC) (civil twilight ends 6:55 pm CDT (23:55 UTC)). At 120 knots the arrival at CPS is before sunrise there (7:06 am CDT (12:06 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







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 Downtown Airport.
