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 14 min at the quickest height in today's winds (34,000 ft, a 83-knot tailwind), arriving about 3:57 am MDT (09:57 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: 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
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 42,000 ft. Over the whole route.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the whole route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Near the route, 39 nm along the 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 last 155 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
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 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 | 260° at 27 kt | −22 kt | 9 °C | 142 kt | 1 h 46 min | 4:29 am MDT (10:29 UTC) |
| 9,500 ft | 250° at 27 kt | −23 kt | 8 °C | 143 kt | 1 h 45 min | 4:28 am MDT (10:28 UTC) |
| 11,500 ft | 240° at 31 kt | −30 kt | 4 °C | 150 kt | 1 h 40 min | 4:23 am MDT (10:23 UTC) |
| 13,500 ft | 230° at 36 kt | −35 kt | 0 °C | 155 kt | 1 h 37 min | 4:20 am MDT (10:20 UTC) |
| 15,500 ft | 230° at 42 kt | −42 kt | -4 °C | 162 kt | 1 h 33 min | 4:16 am MDT (10:16 UTC) |
| 17,500 ft | 230° at 49 kt | −48 kt | -8 °C | 168 kt | 1 h 30 min | 4:13 am MDT (10:13 UTC) |
| 18,000 ft FL180 | 230° at 50 kt | −50 kt | -9 °C | 170 kt | 1 h 29 min | 4:12 am MDT (10:12 UTC) |
| 24,000 ft FL240 | 230° at 58 kt | −57 kt | -20 °C | 177 kt | 1 h 25 min | 4:08 am MDT (10:08 UTC) |
| 30,000 ft FL300 | 230° at 79 kt | −78 kt | -28 °C | 198 kt | 1 h 16 min | 3:59 am MDT (09:59 UTC) |
| 34,000 ft FL340 | 240° at 87 kt | −83 kt | -35 °C | 203 kt | 1 h 14 min | 3:57 am MDT (09:57 UTC) |
| 39,000 ft FL390 | 240° at 76 kt | −72 kt | -47 °C | 192 kt | 1 h 18 min | 4:01 am MDT (10:01 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| FMN | used from 0 nm out; 24 nm from the line | 220/16 6° | 220/39 1° | 220/50 -10° | 230/67 -23° | 230/94 -29° | 230/102 -35° | 230/90 -46° | ||
| ALS | used from 48 nm out; 66 nm from the line | 240/35 3° | 230/54 -9° | 240/66 -19° | 230/85 -26° | 240/87 -34° | 240/70 -47° | |||
| PUB | used from 145 nm out; 73 nm from the line | 260/45 11° | 240/38 6° | 230/47 -8° | 230/51 -19° | 240/74 -29° | 240/82 -35° | 250/72 -48° | ||
| DEN | used from 193 nm out; 34 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° |
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 | no report just now | 5,506 ft | ||||
| DRO Durango, CO | 29 nm out, 5 nm northeast of the line | no report just now | 6,689 ft | ||||
| PSO Pagosa Springs, CO | 58 nm out, 21 nm southeast of the line | no report just now | 7,663 ft | ||||
| ANK Salida, CO | 145 nm out, 8 nm east of the line | no report just now | 7,523 ft | ||||
| APA Denver, CO | 232 nm out, 6 nm southeast of the line, tower | no report just now | 5,884 ft | ||||
| DEN Denver, CO | destination | no report just now | 5,433 ft |
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, 3:57 am MDT (09:57 UTC)
DEN has no terminal forecast; use the nearest airport that does.
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
- 6/8911 DENVER, CO, Monday, October 12, 2026 UTC 8 nm from the route, at the destination end · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · today · 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.