St. Louis Lambert International to Salt Lake City International STL → SLC
1,002 nautical miles (1,153 statute miles) west on a straight line, true course 284°, about 285° magnetic at the departure end (variation 1W). At 120 knots that is 9 h 33 min at the quickest height in today's winds (10,500 ft, a 15-knot headwind), arriving about 12:36 pm MDT (18:36 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: 1,969 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 2W: 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 69 to 526 nm out.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft (due to mountain wave) from 34,000 ft to 43,000 ft. Over the route from 635 to 962 nm out.
- AIRMET TANGO 2W: moderate turbulence below 18,000 ft (due to mountain wave) up to 22,000 ft. Over the route from 665 to 833 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 675 to 883 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the last 268 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the last 248 nm of the route.
- AIRMET TANGO 1W: moderate turbulence below 18,000 ft (due to mountain wave) up to 12,000 ft. Over the last 159 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
Not fetched just now.
Winds aloft along the route, and the time en route the forecast for use 08:00–15:00 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 9 forecast points nearest it (STL, COU, MKC, SLN, GRI, GLD, DEN, RKS, SLC). 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 | 240° at 32 kt | +25 kt | 23 °C | 95 kt | 10 h 33 min | 1:36 pm MDT (19:36 UTC) |
| 6,500 ft | 240° at 25 kt | +20 kt | 18 °C | 100 kt | 10 h 01 min | 1:04 pm MDT (19:04 UTC) |
| 8,500 ft | 250° at 19 kt | +16 kt | 13 °C | 104 kt | 9 h 38 min | 12:41 pm MDT (18:41 UTC) |
| 10,500 ft | 240° at 19 kt | +15 kt | 9 °C | 105 kt | 9 h 33 min | 12:36 pm MDT (18:36 UTC) |
| 12,500 ft | 230° at 22 kt | +15 kt | 4 °C | 105 kt | 9 h 33 min | 12:36 pm MDT (18:36 UTC) |
| 14,500 ft | 230° at 26 kt | +19 kt | -1 °C | 101 kt | 9 h 55 min | 12:58 pm MDT (18:58 UTC) |
| 16,500 ft | 230° at 31 kt | +22 kt | -6 °C | 98 kt | 10 h 13 min | 1:16 pm MDT (19:16 UTC) |
| 18,000 ft FL180 | 230° at 34 kt | +25 kt | -9 °C | 95 kt | 10 h 33 min | 1:36 pm MDT (19:36 UTC) |
| 24,000 ft FL240 | 230° at 45 kt | +33 kt | -21 °C | 87 kt | 11 h 31 min | 2:34 pm MDT (20:34 UTC) |
| 30,000 ft FL300 | 250° at 58 kt | +52 kt | -31 °C | 68 kt | 14 h 44 min | 5:47 pm MDT (23:47 UTC) |
| 34,000 ft FL340 | 250° at 63 kt | +59 kt | -37 °C | 61 kt | 16 h 26 min | 7:29 pm MDT (01:29 UTC) |
| 39,000 ft FL390 | 250° at 58 kt | +55 kt | -47 °C | 65 kt | 15 h 25 min | 6:28 pm MDT (00:28 UTC) |
Based on data from the 12th at 06:00 UTC; valid on the 12th at 12:00 UTC for use 08:00 to 15:00 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 | 250/26 | 240/21 15° | 240/22 11° | 250/23 6° | 270/28 -7° | 260/30 -19° | 280/52 -31° | 280/57 -40° | 300/57 -49° |
| COU | used from 50 nm out; 19 nm from the line | 250/36 | 260/14 16° | 250/5 12° | 260/12 6° | 260/24 -7° | 260/35 -19° | 280/58 -31° | 280/62 -40° | 290/60 -49° |
| MKC | used from 149 nm out; 32 nm from the line | 240/49 | 240/21 20° | 220/19 13° | 230/21 6° | 260/26 -7° | 250/37 -19° | 270/66 -31° | 270/65 -38° | 280/60 -48° |
| SLN | used from 298 nm out; 67 nm from the line | 230/49 | 240/41 22° | 230/26 15° | 220/21 7° | 240/38 -8° | 240/44 -21° | 260/77 -29° | 270/70 -36° | 270/63 -48° |
| GRI | used from 347 nm out; 60 nm from the line | 230/39 23° | 230/32 15° | 210/29 7° | 230/31 -8° | 230/43 -21° | 250/52 -31° | 260/59 -35° | 260/59 -46° | |
| GLD | used from 446 nm out; 79 nm from the line | 260/37 | 260/25 14° | 250/27 8° | 230/36 -8° | 230/49 -21° | 250/71 -30° | 260/82 -36° | 250/73 -48° | |
| DEN | used from 595 nm out; 62 nm from the line | 270/24 11° | 230/13 5° | 230/48 -8° | 230/46 -20° | 230/63 -30° | 240/78 -36° | 240/78 -48° | ||
| RKS | used from 794 nm out; 73 nm from the line | 250/9 | 230/21 -1° | 210/43 -14° | 220/59 -23° | 220/55 -32° | 220/53 -35° | 220/48 -44° | ||
| SLC | used from 943 nm out; 35 nm from the line | 200/16 | 210/23 4° | 220/34 -3° | 210/40 -16° | 220/66 -23° | 220/64 -31° | 220/57 -36° | 220/50 -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 | no report just now | 617 ft | ||||
| COU Columbia, MO | 89 nm out, 16 nm south of the line, tower | no report just now | 889 ft | ||||
| MKC Kansas City, MO | 198 nm out, 21 nm south of the line, tower | no report just now | 756 ft | ||||
| MCI Kansas City, MO | 208 nm out, 12 nm south of the line, tower | no report just now | 1,027 ft | ||||
| RPB Belleville, KS | 347 nm out, 6 nm south of the line | no report just now | 1,538 ft | ||||
| MCK Mc Cook, NE | 486 nm out, 5 nm southeast of the line | no report just now | 2,582 ft | ||||
| IML Imperial, NE | 526 nm out, 12 nm north of the line | no report just now | 3,276 ft | ||||
| FNL Fort Collins/Loveland, CO | 685 nm out, 8 nm south of the line, tower | no report just now | 5,020 ft | ||||
| SBS Steamboat Springs, CO | 764 nm out, 11 nm southwest of the line | no report just now | 6,882 ft | ||||
| CAG Craig, CO | 804 nm out, 14 nm south of the line | no report just now | 6,197 ft | ||||
| HCR Heber, UT | 972 nm out, 19 nm south of the line | no report just now | 5,636 ft | ||||
| SLC Salt Lake City, UT | destination | no report just now | 4,230 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 SLC when you get there the forecast at the estimated arrival, 12:36 pm MDT (18:36 UTC)
SLC 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 4 nm from the route, 89 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · today · ZKC
Daylight
Sunset at STL 6:27 pm CDT (23:27 UTC), at SLC 6:50 pm MDT (00:50 UTC) (civil twilight ends 7:18 pm MDT (01:18 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: St. Louis Lambert International, Salt Lake City International.