St. Louis Lambert International to Cheyenne Rgnl/Jerry Olson Field STL → CYS
679 nautical miles (782 statute miles) west on a straight line, true course 287°, about 288° magnetic at the departure end (variation 1W). At 120 knots that is 5 h 45 min at the quickest height in today's winds (4,500 ft, a 2-knot headwind), arriving about 1:25 am MDT (07:25 UTC), after sunset at the destination. Right now STL is VFR, wind from the southeast (130°) at 7 knots; CYS is VFR, wind from the east (100°) at 11 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 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 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 180 to 450 nm out.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the last 80 nm of the route.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the last 60 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
- UAL1340 at 40,000 ft, 6 nm northeast, 7:18 pm CDT (00:18 UTC): moderate chop turbulence, wind 244° at 70 knots. 499 nm along the route, 6 nm northeast of the line.
as filed, and in English
ARP UAL1340 4046N 10049W 0018 F400 244/070KT TB OCNL MOD CHOP IC
- Report
- a routine report filed through ARP
- A21N at 32,000 ft, 47 nm south, 6:42 pm CDT (23:42 UTC): moderate chop turbulence, remarks: ZDVWC-61. 629 nm along the route, 47 nm south of the line.
as filed, and in English
AKO UA /OV AKO270030/TM 2342/FL320/TP A21N/TB INTMT MOD CHOP/RM ZDVWC-61
- Report
- a routine report filed through AKO
- Where
- 30 nm west (270°) of AKO
- Time
- 23:42 UTC
- Height
- at 32,000 ft
- Aircraft
- A21N
- Turbulence
- intermittent moderate chop
- Remarks
- ZDVWC-61
- BCS3 at 24,000 ft, 46 nm south, 6:28 pm CDT (23:28 UTC): moderate turbulence from 22,000 ft to 24,000 ft, remarks: during the descent. At the destination end, 46 nm south of the line.
as filed, and in English
DEN UA /OV DEN320045/TM 2328/FL240/TP BCS3/TB MOD 240-220/RM DURD
- Report
- a routine report filed through DEN
- Where
- 45 nm northwest (320°) of DEN
- Time
- 23:28 UTC
- Height
- at 24,000 ft
- Aircraft
- BCS3
- Turbulence
- moderate from 24,000 ft to 22,000 ft
- Remarks
- during the descent
- B789 at 40,000 ft, 6 nm northeast, 7:22 pm CDT (00:22 UTC): light to moderate clear-air turbulence, remarks: zdvwc. 519 nm along the route, 6 nm northeast of the line.
as filed, and in English
SNY UA /OV SNY088081/TM 0022/FL400/TP B789/TB OCNL LGT-MOD CAT/RM ZDVWC
- Report
- a routine report filed through SNY
- Where
- 81 nm east (088°) of SNY
- Time
- 00:22 UTC
- Height
- at 40,000 ft
- Aircraft
- B789
- Turbulence
- occasional light to moderate clear-air turbulence
- Remarks
- zdvwc
- B789 at 40,000 ft, 7 nm northeast, 7:22 pm CDT (00:22 UTC): light to moderate clear-air turbulence, remarks: zdvwc. 529 nm along the route, 7 nm northeast of the line.
as filed, and in English
SNY UA /OV SNY088072/TM 0022/FL400/TP B789/TB OCNL LGT-MOD CAT /RM ZDVWC
- Report
- a routine report filed through SNY
- Where
- 72 nm east (088°) of SNY
- Time
- 00:22 UTC
- Height
- at 40,000 ft
- Aircraft
- B789
- Turbulence
- occasional light to moderate clear-air turbulence
- Remarks
- zdvwc
- B738 at 35,000 ft, 47 nm south, 6:30 pm CDT (23:30 UTC): light turbulence, remarks: ZDVWC-07. 629 nm along the route, 47 nm south of the line.
as filed, and in English
AKO UA /OV AKO270030/TM 2330/FL350/TP B738/TB CONS LGT /RM ZDVWC-07
- Report
- a routine report filed through AKO
- Where
- 30 nm west (270°) of AKO
- Time
- 23:30 UTC
- Height
- at 35,000 ft
- Aircraft
- B738
- Turbulence
- continuous light
- Remarks
- ZDVWC-07
- B763 at 36,000 ft, 34 nm north, 5:48 pm CDT (22:48 UTC): no turbulence, remarks: ZDVWC-33. 639 nm along the route, 34 nm north of the line.
as filed, and in English
BFF UA /OV BFF200020/TM 2248/FL360/TP B763/SK TOP 320-340/TB NEG/RM ZDVWC-33
- Report
- a routine report filed through BFF
- Where
- 20 nm south (200°) of BFF
- Time
- 22:48 UTC
- Height
- at 36,000 ft
- Aircraft
- B763
- Sky
- top from 32,000 ft to 34,000 ft
- Turbulence
- none
- Remarks
- ZDVWC-33
- B752 at 35,000 ft, 48 nm north, 6:21 pm CDT (23:21 UTC): light to moderate turbulence, remarks: ZDVWC-33. At the destination end, 48 nm north of the line.
as filed, and in English
CYS UA /OV CYS350045/TM 2321/FL350/TP B752/TB CONS LGT-MOD/RM ZDVWC-33
- Report
- a routine report filed through CYS
- Where
- 45 nm north (350°) of CYS
- Time
- 23:21 UTC
- Height
- at 35,000 ft
- Aircraft
- B752
- Turbulence
- continuous light to moderate
- Remarks
- ZDVWC-33
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 7 forecast points nearest it (STL, COU, MKC, OMA, GRI, GLD, BFF). 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 | 200° at 22 kt | +2 kt | 19 °C | 118 kt | 5 h 45 min | 1:25 am MDT (07:25 UTC) |
| 6,500 ft | 210° at 21 kt | +6 kt | 16 °C | 114 kt | 5 h 57 min | 1:37 am MDT (07:37 UTC) |
| 8,500 ft | 230° at 21 kt | +12 kt | 13 °C | 108 kt | 6 h 17 min | 1:57 am MDT (07:57 UTC) |
| 10,500 ft | 240° at 21 kt | +15 kt | 9 °C | 105 kt | 6 h 28 min | 2:08 am MDT (08:08 UTC) |
| 12,500 ft | 250° at 21 kt | +17 kt | 6 °C | 103 kt | 6 h 36 min | 2:16 am MDT (08:16 UTC) |
| 14,500 ft | 250° at 22 kt | +19 kt | 1 °C | 101 kt | 6 h 43 min | 2:23 am MDT (08:23 UTC) |
| 16,500 ft | 250° at 23 kt | +21 kt | -4 °C | 99 kt | 6 h 52 min | 2:32 am MDT (08:32 UTC) |
| 18,000 ft FL180 | 260° at 24 kt | +22 kt | -7 °C | 98 kt | 6 h 56 min | 2:36 am MDT (08:36 UTC) |
| 24,000 ft FL240 | 260° at 29 kt | +27 kt | -19 °C | 93 kt | 7 h 18 min | 2:58 am MDT (08:58 UTC) |
| 30,000 ft FL300 | 250° at 38 kt | +35 kt | -33 °C | 85 kt | 7 h 59 min | 3:39 am MDT (09:39 UTC) |
| 34,000 ft FL340 | 260° at 46 kt | +45 kt | -41 °C | 75 kt | 9 h 03 min | 4:43 am MDT (10:43 UTC) |
| 39,000 ft FL390 | 270° at 56 kt | +56 kt | -50 °C | 64 kt | 10 h 37 min | 6:17 am MDT (12:17 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; 22 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 150 nm out; 38 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° |
| OMA | used from 250 nm out; 83 nm from the line | 190/34 | 230/34 19° | 250/25 12° | 250/18 6° | 250/22 -7° | 250/28 -19° | 260/34 -32° | 260/39 -41° | 280/56 -51° |
| GRI | used from 300 nm out; 74 nm from the line | 210/31 19° | 240/21 14° | 240/17 6° | 260/27 -7° | 260/34 -18° | 240/45 -32° | 250/56 -40° | 260/62 -51° | |
| GLD | used from 499 nm out; 85 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° | |
| BFF | used from 549 nm out; 76 nm from the line | 120/24 | 180/31 13° | 210/26 7° | 230/25 -7° | 240/41 -20° | 230/52 -36° | 250/56 -41° | 260/57 -45° |
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) |
| FYG Washington, MO | 30 nm out, 18 nm south of the line | reported, no category | from the east-southeast (110°) at 6 knots | 4 mi | none | 487 ft | 21:55 UTC |
| COU Columbia, MO | 80 nm out, 21 nm southwest of the line, tower | VFR | from the south (180°) at 4 knots | 10+ mi | none | 889 ft | 00:54 UTC |
| MCI Kansas City, MO | 200 nm out, 23 nm southwest of the line, tower | VFR | from the south (180°) at 10 knots | 10+ mi | none | 1,027 ft | 00:53 UTC |
| STJ St Joseph, MO | 220 nm out, 3 nm north of the line, tower | VFR | from the south (170°) at 8 knots | 10+ mi | none | 826 ft | 00:53 UTC |
| FBY Fairbury, NE | 330 nm out, 4 nm northeast of the line | no report just now | 1,478 ft | ||||
| HJH Hebron, NE | 350 nm out, 6 nm southeast of the line | VFR | from the south (170°) at 8 knots | 10+ mi | none | 1,468 ft | 01:15 UTC |
| HDE Holdrege, NE | 430 nm out, 3 nm southeast of the line | VFR | from the south-southeast (160°) at 11 knots | 10+ mi | none | 2,313 ft | 01:15 UTC |
| GGF Grant, NE | 539 nm out, 4 nm north of the line | VFR | from the east-northeast (060°) at 9 knots | 10+ mi | none | 3,424 ft | 01:35 UTC |
| SNY Sidney, NE | 599 nm out, 9 nm northeast of the line | VFR | from the south (190°) at 9 knots, gusting to 17 | 10+ mi | none | 4,314 ft | 19:53 UTC |
| IBM Kimball, NE | 629 nm out, 9 nm north of the line | VFR | from the east-southeast (110°) at 14 knots | 10+ mi | none | 4,925 ft | 01:15 UTC |
| CYS Cheyenne, WY | destination | VFR | from the east (100°) at 11 knots | 10+ mi | none | 6,159 ft | 6:53 pm MDT (00:53 UTC) |
The highest airport on this list sits at 6,159 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At CYS when you get there the forecast at the estimated arrival, 1:25 am MDT (07:25 UTC)
Wind from the west at 8 knots, visibility more than 6 miles, low-level wind shear, a few clouds at 20,000 feet VFR
The whole forecast for CYS
- From Sun 6:00 pm MDT (00:00 UTC): wind from the southeast at 10 knots, gusting to 20, visibility more than 6 miles, showers nearby, a broken layer at 15,000 feet
- From Sun 9:00 pm MDT (03:00 UTC): wind light and variable, visibility more than 6 miles, showers nearby, scattered clouds at 15,000 feet
- From Mon 12:00 am MDT (06:00 UTC): wind from the west at 8 knots, visibility more than 6 miles, low-level wind shear, a few clouds at 20,000 feet
- From Mon 7:00 am MDT (13:00 UTC): wind from the west-southwest 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 3 nm from the route, 90 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 CYS 6:23 pm MDT (00:23 UTC) (civil twilight ends 6:51 pm MDT (00:51 UTC)). At 120 knots the arrival at CYS is before sunrise there (7:07 am MDT (13:07 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, Cheyenne Rgnl/Jerry Olson Field.