Denver International to Pierre Regional DEN → PIR
334 nautical miles (385 statute miles) northeast on a straight line, true course 034°, about 026° magnetic at the departure end (variation 8E). At 120 knots that is 2 h 03 min at the quickest height in today's winds (39,000 ft, a 43-knot tailwind), arriving about 4:46 am CDT (09:46 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: 1,297 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 38,000 ft, from 12:00 am MDT (06:00 UTC). Over the first 147 nm of the route.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft, from 12:00 am MDT (06:00 UTC). Over the first 88 nm of the route.
- 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), from 12:00 am MDT (06:00 UTC). Over the route from 118 to 206 nm out.
- AIRMET SIERRA 4E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist), from 12:00 am MDT (06:00 UTC). Over the last 147 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 DEN.
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 4 forecast points nearest it (DEN, BFF, RAP, PIR). 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 | 180° at 25 kt | −20 kt | 16 °C | 140 kt | 2 h 23 min | 5:06 am CDT (10:06 UTC) |
| 7,500 ft | 200° at 25 kt | −24 kt | 14 °C | 144 kt | 2 h 19 min | 5:02 am CDT (10:02 UTC) |
| 9,500 ft | 210° at 29 kt | −29 kt | 13 °C | 149 kt | 2 h 14 min | 4:57 am CDT (09:57 UTC) |
| 11,500 ft | 220° at 32 kt | −32 kt | 7 °C | 152 kt | 2 h 12 min | 4:55 am CDT (09:55 UTC) |
| 13,500 ft | 220° at 32 kt | −32 kt | 2 °C | 152 kt | 2 h 12 min | 4:55 am CDT (09:55 UTC) |
| 15,500 ft | 220° at 32 kt | −31 kt | -2 °C | 151 kt | 2 h 13 min | 4:56 am CDT (09:56 UTC) |
| 17,500 ft | 230° at 31 kt | −31 kt | -8 °C | 151 kt | 2 h 13 min | 4:56 am CDT (09:56 UTC) |
| 18,000 ft FL180 | 230° at 31 kt | −31 kt | -9 °C | 151 kt | 2 h 13 min | 4:56 am CDT (09:56 UTC) |
| 24,000 ft FL240 | 230° at 38 kt | −37 kt | -21 °C | 157 kt | 2 h 08 min | 4:51 am CDT (09:51 UTC) |
| 30,000 ft FL300 | 230° at 40 kt | −39 kt | -34 °C | 159 kt | 2 h 06 min | 4:49 am CDT (09:49 UTC) |
| 34,000 ft FL340 | 250° at 48 kt | −41 kt | -37 °C | 161 kt | 2 h 04 min | 4:47 am CDT (09:47 UTC) |
| 39,000 ft FL390 | 250° at 53 kt | −43 kt | -46 °C | 163 kt | 2 h 03 min | 4:46 am CDT (09:46 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| DEN | used from 0 nm out; 25 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° | ||
| BFF | used from 49 nm out; 61 nm from the line | 180/28 | 220/33 15° | 210/31 7° | 230/32 -9° | 220/41 -21° | 220/40 -33° | 240/47 -36° | 250/54 -46° | |
| RAP | used from 197 nm out; 88 nm from the line | 180/23 12° | 200/38 13° | 210/38 6° | 220/28 -10° | 230/34 -21° | 230/37 -36° | 250/52 -38° | 250/59 -46° | |
| PIR | used from 246 nm out; 64 nm from the line | 170/22 19° | 190/25 13° | 210/32 6° | 240/23 -9° | 250/32 -21° | 250/38 -36° | 260/44 -40° | 260/52 -47° |
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 |
|---|---|---|---|---|---|---|---|
| DEN Denver, CO | departure | no report just now | 5,433 ft | ||||
| GXY Greeley, CO | 29 nm out, 18 nm northwest of the line | no report just now | 4,696 ft | ||||
| FMM Fort Morgan, CO | 49 nm out, 17 nm southeast of the line | no report just now | 4,595 ft | ||||
| IBM Kimball, NE | 88 nm out, 8 nm northwest of the line | no report just now | 4,925 ft | ||||
| AIA Alliance, NE | 157 nm out, 6 nm northwest of the line | no report just now | 3,930 ft | ||||
| GRN Gordon, NE | 206 nm out, 10 nm northwest of the line | no report just now | 3,562 ft | ||||
| SUO Rosebud, SD | 265 nm out, 21 nm southeast of the line | no report just now | 2,724 ft | ||||
| PIR Pierre, SD | destination | no report just now | 1,744 ft |
The highest airport on this list sits at 5,433 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At PIR when you get there the forecast at the estimated arrival, 4:46 am CDT (09:46 UTC)
PIR has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
- 6/8911 DENVER, CO, Monday, October 12, 2026 UTC 8 nm from the route, at the departure end · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · today · ZDV
Daylight
Sunset at DEN 6:22 pm MDT (00:22 UTC), at PIR 7:00 pm CDT (00:00 UTC) (civil twilight ends 7:29 pm CDT (00:29 UTC)). At 120 knots the arrival at PIR is before sunrise there (7:52 am CDT (12:52 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: Denver International, Pierre Regional.