Four Corners Regional to Denver International FMN → DEN
251 nautical miles (289 statute miles) northeast on a straight line, true course 041°, about 029° magnetic at the departure end (variation 12E). At 120 knots that is 1 h 20 min at the quickest height in today's winds (30,000 ft, a 68-knot tailwind), arriving about 2:11 am MDT (08:11 UTC), after sunset at the destination. Right now FMN is VFR, wind from the southwest (230°) at 5 knots; DEN is VFR, wind from the southwest (220°) at 21 knots, gusting to 29. 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: 735 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 C10C: thunderstorms (a convective SIGMET) up to 34,000 ft, moving from the southwest at 40 knots, until 1:55 am MDT (07:55 UTC). Near the route, 126 nm along the route.
as issued
WSUS32 KKCI 120555 MKCC WST 120555 CONVECTIVE SIGMET 10C VALID UNTIL 0755Z CO NM FROM 20NNE PUB-40WSW LAA-30WSW CIM-50WSW ALS-50ESE HBU-20NNE PUB AREA TS MOV FROM 22040KT. TOPS TO FL340.
- AIRMET TANGO 2W: moderate turbulence above 18,000 ft from 35,000 ft to 45,000 ft. Over the first 77 nm of the route.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the whole route.
- 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 77 to 222 nm out.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 38,000 ft. Over the last 164 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 FMN.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- urgent E75L at 9,000 ft, 49 nm northwest, 10:30 pm MDT (04:30 UTC): remarks: low-level wind shear + 20K 1000-1500 above ground on approach. 155 nm along the route, 49 nm northwest of the line.
as filed, and in English
ASE UUA /OV ASE/TM 0430/FL090/TP E75L/RM LLWS +/- 20K 1000-1500 AGL ON APCH
- Report
- an urgent report filed through ASE
- Where
- over ASE
- Time
- 04:30 UTC
- Height
- at 9,000 ft
- Aircraft
- E75L
- Remarks
- low-level wind shear + 20K 1000-1500 above ground on approach
- A321 at 31,000 ft, 39 nm southeast, 12:41 am MDT (06:41 UTC): moderate turbulence, remarks: mtw +/-15KT zdvwc. 213 nm along the route, 39 nm southeast of the line.
as filed, and in English
COS UA /OV BRK/TM 0641/FL310/TP A321/TB MOD/RM MTW +/-15KT. ZDVWC
- Report
- a routine report filed through COS
- Where
- over BRK
- Time
- 06:41 UTC
- Height
- at 31,000 ft
- Aircraft
- A321
- Turbulence
- moderate
- Remarks
- mtw +/-15KT zdvwc
- PC12 at 26,000 ft, 11 nm southeast, 12:27 am MDT (06:27 UTC): light chop turbulence, remarks: ZDVWC-12. 135 nm along the route, 11 nm southeast of the line.
as filed, and in English
GUC UA /OV HBU090040/TM 0627/FL260/TP PC12/TB OCNL LGT CHOP/RM ZDVWC-12
- Report
- a routine report filed through GUC
- Where
- 40 nm east (090°) of HBU
- Time
- 06:27 UTC
- Height
- at 26,000 ft
- Aircraft
- PC12
- Turbulence
- occasional light chop
- Remarks
- ZDVWC-12
- CRJ2 at 22,000 ft, 4 nm west, 12:35 am MDT (06:35 UTC): no turbulence up to 26,000 ft, no icing, clear from 22,000 ft to 60,000 ft, remarks: during the descent ZDVWC-26. 193 nm along the route, 4 nm west of the line.
as filed, and in English
DEN UA /OV DEN220060/TM 0635/FL220/TP CRJ2/SK SKC/TB NEG BLO 260/IC NEG/RM DURD/ ZDVWC-26
- Report
- a routine report filed through DEN
- Where
- 60 nm southwest (220°) of DEN
- Time
- 06:35 UTC
- Height
- at 22,000 ft
- Aircraft
- CRJ2
- Sky
- clear
- Turbulence
- no below 26,000 ft
- Icing
- none
- Remarks
- during the descent ZDVWC-26
- B738 at 23,000 ft, 13 nm northwest, 12:23 am MDT (06:23 UTC): no turbulence from 23,000 ft to 26,000 ft, clear from 23,000 ft to 60,000 ft, remarks: during the descent sskii star ZDVWC-06. 193 nm along the route, 13 nm northwest of the line.
as filed, and in English
DEN UA /OV DEN230060/TM 0623/FL230/TP B738/SK SKC/TB NEG 230-260/RM DURD SSKII STAR. ZDVWC-06
- Report
- a routine report filed through DEN
- Where
- 60 nm southwest (230°) of DEN
- Time
- 06:23 UTC
- Height
- at 23,000 ft
- Aircraft
- B738
- Sky
- clear
- Turbulence
- no from 23,000 ft to 26,000 ft
- Remarks
- during the descent sskii star ZDVWC-06
- E170 at 22,500 ft, 2 nm south, 11:06 pm MDT (05:06 UTC): light to moderate turbulence up to 23,000 ft, remarks: during the descent tbarr star ZDVWC-13. 193 nm along the route, 2 nm south of the line.
as filed, and in English
DEN UA /OV DEN216057/TM 0506/FL225/TP E170/TB CONS LGT OCNL MOD BLO 230/RM DURD TBARR STAR. ZDVWC-13
- Report
- a routine report filed through DEN
- Where
- 57 nm southwest (216°) of DEN
- Time
- 05:06 UTC
- Height
- at 22,500 ft
- Aircraft
- E170
- Turbulence
- continuous light occasional moderate below 23,000 ft
- Remarks
- during the descent tbarr star ZDVWC-13
- A20N at 25,000 ft, 23 nm northwest, 12:19 am MDT (06:19 UTC): light chop turbulence up to 26,000 ft, remarks: during the climb ZDVWC-06. 213 nm along the route, 23 nm northwest of the line.
as filed, and in English
DEN UA /OV DEN250045/TM 0619/FL250/TP A20N/TB OCNL LGT CHOP BLO 260/RM DURC. ZDVWC-06
- Report
- a routine report filed through DEN
- Where
- 45 nm west (250°) of DEN
- Time
- 06:19 UTC
- Height
- at 25,000 ft
- Aircraft
- A20N
- Turbulence
- occasional light chop below 26,000 ft
- Remarks
- during the climb ZDVWC-06
- B738 descending, 3 nm south, 12:15 am MDT (06:15 UTC): light chop turbulence. At the destination end, 3 nm south of the line.
as filed, and in English
DEN UA /OV DEN/TM 0615/FLDURD/TP B738/TB LGT CHOP
- Report
- a routine report filed through DEN
- Where
- over DEN
- Time
- 06:15 UTC
- Height
- during the descent
- Aircraft
- B738
- Turbulence
- light chop
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 4 forecast points nearest it (FMN, ALS, PUB, DEN). A plus sign is a headwind, a minus sign a tailwind.
| Height | Average wind | Head- or tailwind | Temperature | Ground speed | Time en route | Arrival |
|---|---|---|---|---|---|---|
| 7,500 ft | 230° at 24 kt | −24 kt | 12 °C | 144 kt | 1 h 45 min | 2:36 am MDT (08:36 UTC) |
| 9,500 ft | 230° at 26 kt | −26 kt | 11 °C | 146 kt | 1 h 43 min | 2:34 am MDT (08:34 UTC) |
| 11,500 ft | 230° at 36 kt | −36 kt | 5 °C | 156 kt | 1 h 37 min | 2:28 am MDT (08:28 UTC) |
| 13,500 ft | 230° at 41 kt | −40 kt | 1 °C | 160 kt | 1 h 34 min | 2:25 am MDT (08:25 UTC) |
| 15,500 ft | 220° at 45 kt | −45 kt | -3 °C | 165 kt | 1 h 31 min | 2:22 am MDT (08:22 UTC) |
| 17,500 ft | 220° at 50 kt | −50 kt | -8 °C | 170 kt | 1 h 29 min | 2:20 am MDT (08:20 UTC) |
| 18,000 ft FL180 | 220° at 51 kt | −51 kt | -9 °C | 171 kt | 1 h 28 min | 2:19 am MDT (08:19 UTC) |
| 24,000 ft FL240 | 230° at 56 kt | −56 kt | -22 °C | 176 kt | 1 h 26 min | 2:17 am MDT (08:17 UTC) |
| 30,000 ft FL300 | 240° at 70 kt | −68 kt | -28 °C | 188 kt | 1 h 20 min | 2:11 am MDT (08:11 UTC) |
| 34,000 ft FL340 | 240° at 72 kt | −68 kt | -34 °C | 188 kt | 1 h 20 min | 2:11 am MDT (08:11 UTC) |
| 39,000 ft FL390 | 230° at 59 kt | −57 kt | -45 °C | 177 kt | 1 h 25 min | 2:16 am MDT (08:16 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| FMN | used from 0 nm out; 24 nm from the line | 220/28 9° | 220/40 2° | 220/53 -10° | 220/62 -22° | 230/79 -28° | 240/91 -34° | 230/71 -45° | ||
| ALS | used from 48 nm out; 66 nm from the line | 230/37 4° | 220/54 -9° | 230/62 -22° | 240/77 -26° | 240/74 -33° | 230/59 -45° | |||
| PUB | used from 145 nm out; 73 nm from the line | 230/25 13° | 230/32 6° | 220/44 -8° | 230/49 -21° | 240/70 -28° | 240/67 -34° | 240/58 -46° | ||
| DEN | used from 193 nm out; 34 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° |
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 |
|---|---|---|---|---|---|---|---|
| FMN Farmington, NM | departure | VFR | from the southwest (230°) at 5 knots | 10+ mi | none | 5,506 ft | 11:53 pm MDT (05:53 UTC) |
| DRO Durango, CO | 29 nm out, 5 nm northeast of the line | VFR Sky: a few clouds at 6,000 feet | calm | 10+ mi | none | 6,689 ft | 05:53 UTC |
| PSO Pagosa Springs, CO | 58 nm out, 21 nm southeast of the line | IFR Sky: a broken layer at 2,900 feet, a broken layer at 3,600 feet, overcast at 6,500 feet Weather: mist | variable at 1 knots | 1.75 mi | 2,900 ft | 7,663 ft | 06:35 UTC |
| ANK Salida, CO | 145 nm out, 8 nm east of the line | VFR | from the south (180°) at 8 knots | 10+ mi | none | 7,523 ft | 06:35 UTC |
| APA Denver, CO | 232 nm out, 6 nm southeast of the line, tower | VFR Sky: a few clouds at 12,000 feet, scattered clouds at 22,000 feet | from the south (170°) at 9 knots | 10+ mi | none | 5,884 ft | 05:53 UTC |
| DEN Denver, CO | destination | VFR Sky: a few clouds at 6,000 feet, scattered clouds at 22,000 feet | from the southwest (220°) at 21 knots, gusting to 29 | 10+ mi | none | 5,433 ft | 11:53 pm MDT (05:53 UTC) |
The highest airport on this list sits at 7,663 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At DEN when you get there the forecast at the estimated arrival, 2:11 am MDT (08:11 UTC)
Wind from the south-southwest at 15 knots, gusting to 25, visibility more than 6 miles, a few clouds at 14,000 feet VFR
The whole forecast for DEN
- From Mon 12:00 am MDT (06:00 UTC): wind from the south-southwest at 15 knots, gusting to 25, visibility more than 6 miles, a few clouds at 14,000 feet
- From Mon 3:00 am MDT (09:00 UTC): wind from the south at 11 knots, visibility more than 6 miles, a few clouds at 22,000 feet
- From Mon 10:00 am MDT (16:00 UTC): wind from the southwest at 14 knots, gusting to 21, visibility more than 6 miles, clear skies
- From Mon 4:00 pm MDT (22:00 UTC): wind from the south at 9 knots, visibility more than 6 miles, clear skies
- From Mon 7:00 pm MDT (01:00 UTC): wind from the northeast at 8 knots, visibility more than 6 miles, a few clouds at 15,000 feet
- From Mon 11:00 pm MDT (05:00 UTC): wind from the north at 10 knots, visibility more than 6 miles, a few clouds at 3,000 feet
The forecast for FMN, the departure
- From Mon 12:00 am MDT (06:00 UTC): wind from the south at 8 knots, visibility more than 6 miles, a few clouds at 6,000 feet
- From Mon 3:00 am MDT (09:00 UTC): wind from the southeast at 7 knots, visibility more than 6 miles, scattered clouds at 6,000 feet
- From Mon 10:00 am MDT (16:00 UTC): wind from the south-southwest at 14 knots, gusting to 24, visibility more than 6 miles, a few clouds at 5,000 feet, scattered clouds at 20,000 feet
- From Mon 6:00 pm MDT (00:00 UTC): wind from the south-southwest at 10 knots, visibility more than 6 miles, a few clouds at 5,000 feet, a broken layer at 20,000 feet
Temporary flight restrictions on the line or within 25 nm of it
- 6/8784 LAKE GEORGE, CO, Sunday, October 11, 2026 through Tuesday, October 13, 2026 UTC 9 nm from the route, 184 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 13 October · ZDV
Daylight
Sunset at FMN 6:39 pm MDT (00:39 UTC), at DEN 6:22 pm MDT (00:22 UTC) (civil twilight ends 6:49 pm MDT (00:49 UTC)). At 120 knots the arrival at DEN is before sunrise there (7:05 am MDT (13:05 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: Four Corners Regional, Denver International.