Salt Lake City International to St. Louis Downtown Airport SLC → CPS
1,014 nautical miles (1,167 statute miles) east on a straight line, true course 090°, about 079° magnetic at the departure end (variation 11E). At 120 knots that is 6 h at the quickest height in today's winds (39,000 ft, a 49-knot tailwind), arriving about 7:45 am CDT (12:45 UTC). 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
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the first 169 nm of the route.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the first 398 nm of the route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 239 nm of the route.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 38,000 ft. Over the route from 30 to 438 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 129 to 298 nm out.
- AIRMET TANGO 5W: strong surface winds (30 knots or more) (due to sustained surface winds greater than 30 knots). Over the route from 129 to 189 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 418 to 905 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 SLC.
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 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 9 forecast points nearest it (SLC, RKS, DEN, GLD, GRI, 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 32 kt | −22 kt | 21 °C | 142 kt | 7 h 08 min | 8:53 am CDT (13:53 UTC) |
| 7,500 ft | 230° at 27 kt | −18 kt | 15 °C | 138 kt | 7 h 21 min | 9:06 am CDT (14:06 UTC) |
| 9,500 ft | 230° at 24 kt | −17 kt | 11 °C | 137 kt | 7 h 24 min | 9:09 am CDT (14:09 UTC) |
| 11,500 ft | 230° at 25 kt | −18 kt | 7 °C | 138 kt | 7 h 21 min | 9:06 am CDT (14:06 UTC) |
| 13,500 ft | 230° at 26 kt | −19 kt | 2 °C | 139 kt | 7 h 18 min | 9:03 am CDT (14:03 UTC) |
| 15,500 ft | 230° at 27 kt | −20 kt | -3 °C | 140 kt | 7 h 15 min | 9:00 am CDT (14:00 UTC) |
| 17,500 ft | 230° at 28 kt | −21 kt | -7 °C | 141 kt | 7 h 11 min | 8:56 am CDT (13:56 UTC) |
| 18,000 ft FL180 | 230° at 28 kt | −21 kt | -8 °C | 141 kt | 7 h 11 min | 8:56 am CDT (13:56 UTC) |
| 24,000 ft FL240 | 230° at 36 kt | −24 kt | -21 °C | 144 kt | 7 h 02 min | 8:47 am CDT (13:47 UTC) |
| 30,000 ft FL300 | 240° at 49 kt | −39 kt | -30 °C | 159 kt | 6 h 23 min | 8:08 am CDT (13:08 UTC) |
| 34,000 ft FL340 | 250° at 54 kt | −48 kt | -37 °C | 168 kt | 6 h 02 min | 7:47 am CDT (12:47 UTC) |
| 39,000 ft FL390 | 250° at 53 kt | −49 kt | -47 °C | 169 kt | 6 h | 7:45 am CDT (12:45 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| SLC | used from 0 nm out; 25 nm from the line | 200/5 | 230/8 2° | 220/20 -2° | 210/40 -12° | 190/53 -25° | 210/62 -30° | 220/69 -34° | 220/64 -43° | |
| RKS | used from 99 nm out; 52 nm from the line | 200/41 | 220/44 1° | 220/35 -11° | 220/46 -24° | 210/53 -27° | 220/62 -35° | 230/61 -44° | ||
| DEN | used from 249 nm out; 74 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 398 nm out; 76 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° | |
| GRI | used from 547 nm out; 78 nm from the line | 230/35 21° | 230/23 13° | 220/20 7° | 240/25 -8° | 240/37 -20° | 250/49 -33° | 260/57 -38° | 260/58 -47° | |
| SLN | used from 646 nm out; 61 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 746 nm out; 37 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 845 nm out; 48 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 945 nm out; 33 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 |
|---|---|---|---|---|---|---|---|
| SLC Salt Lake City, UT | departure | no report just now | 4,230 ft | ||||
| HCR Heber, UT | 30 nm out, 19 nm south of the line | no report just now | 5,636 ft | ||||
| CAG Craig, CO | 199 nm out, 12 nm south of the line | no report just now | 6,197 ft | ||||
| SBS Steamboat Springs, CO | 229 nm out, 9 nm southeast of the line | no report just now | 6,882 ft | ||||
| FNL Fort Collins/Loveland, CO | 318 nm out, 5 nm south of the line, tower | no report just now | 5,020 ft | ||||
| RYA Wray, CO | 448 nm out, 13 nm south of the line | no report just now | 3,677 ft | ||||
| MCK Mc Cook, NE | 517 nm out, 4 nm northeast of the line | no report just now | 2,582 ft | ||||
| RPB Belleville, KS | 656 nm out, 1 nm east of the line | no report just now | 1,538 ft | ||||
| MCI Kansas City, MO | 796 nm out, 6 nm south of the line, tower | no report just now | 1,027 ft | ||||
| GPH Mosby, MO | 816 nm out, 1 nm northwest of the line | no report just now | 777 ft | ||||
| SUS St Louis, MO | 995 nm out, 4 nm west of the line, tower | no report just now | 463 ft | ||||
| CPS Cahokia/St Louis, IL | destination | no report just now | 412 ft |
The highest airport on this list sits at 6,882 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, 7:45 am CDT (12:45 UTC)
CPS has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
- 6/7634 CENTRALIA, MO, Monday, October 12, 2026 UTC 10 nm from the route, 915 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · today · ZKC
Daylight
Sunset at SLC 6:50 pm MDT (00:50 UTC), at CPS 6:27 pm CDT (23:27 UTC) (civil twilight ends 6:53 pm CDT (23:53 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: Salt Lake City International, St. Louis Downtown Airport.