Plan a flight · Sun 11:36 pm MDT (05:36 UTC)

Denver International to Jamestown Regional DEN → JMS

498 nautical miles (573 statute miles) northeast on a straight line, true course 030°, about 022° magnetic at the departure end (variation 8E). At 120 knots that is 3 h 08 min at the quickest height in today's winds (39,000 ft, a 39-knot tailwind), arriving about 3:44 am CDT (08:44 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: 1,226 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. Over the first 159 nm of the route.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the first 100 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). Over the route from 159 to 189 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). Over the last 319 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

A320 descending, 3 nm south, 9:19 pm MDT (03:19 UTC): no turbulence up to 10,000 ft. At the departure end, 3 nm south of the line.
as filed, and in English
```
DEN UA /OV DEN/TM 0319/FLDURD/TP A320/TB NEG BLO 100
```
Report
a routine report filed through DEN
Where
over DEN
Time
03:19 UTC
Height
during the descent
Aircraft
A320
Turbulence
no below 10,000 ft

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 5 forecast points nearest it (DEN, BFF, RAP, PIR, ABR). 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 20 kt	−17 kt	17 °C	137 kt	3 h 38 min	4:14 am CDT (09:14 UTC)
7,500 ft	200° at 21 kt	−21 kt	15 °C	141 kt	3 h 32 min	4:08 am CDT (09:08 UTC)
9,500 ft	220° at 25 kt	−25 kt	12 °C	145 kt	3 h 26 min	4:02 am CDT (09:02 UTC)
11,500 ft	220° at 29 kt	−29 kt	7 °C	149 kt	3 h 21 min	3:57 am CDT (08:57 UTC)
13,500 ft	230° at 30 kt	−29 kt	2 °C	149 kt	3 h 21 min	3:57 am CDT (08:57 UTC)
15,500 ft	230° at 30 kt	−29 kt	-3 °C	149 kt	3 h 21 min	3:57 am CDT (08:57 UTC)
17,500 ft	240° at 30 kt	−28 kt	-8 °C	148 kt	3 h 22 min	3:58 am CDT (08:58 UTC)
18,000 ft FL180	240° at 30 kt	−28 kt	-9 °C	148 kt	3 h 22 min	3:58 am CDT (08:58 UTC)
24,000 ft FL240	240° at 37 kt	−33 kt	-21 °C	153 kt	3 h 15 min	3:51 am CDT (08:51 UTC)
30,000 ft FL300	240° at 37 kt	−33 kt	-35 °C	153 kt	3 h 15 min	3:51 am CDT (08:51 UTC)
34,000 ft FL340	250° at 46 kt	−36 kt	-38 °C	156 kt	3 h 12 min	3:48 am CDT (08:48 UTC)
39,000 ft FL390	250° at 52 kt	−39 kt	-47 °C	159 kt	3 h 08 min	3:44 am CDT (08:44 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 50 nm out; 57 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 199 nm out; 70 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 249 nm out; 65 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°
ABR	used from 399 nm out; 59 nm from the line	070/14	250/10 17°	270/16 11°	260/28 5°	260/36 -10°	260/41 -22°	270/33 -37°	260/42 -42°	260/50 -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	Elevation
DEN Denver, CO	departure	no report just now	5,433 ft
GXY Greeley, CO	30 nm out, 16 nm northwest of the line	no report just now	4,696 ft
IBM Kimball, NE	90 nm out, 2 nm north of the line	no report just now	4,925 ft
BFF Scottsbluff, NE	130 nm out, 18 nm northwest of the line	no report just now	3,967 ft
AIA Alliance, NE	159 nm out, 8 nm southeast of the line	no report just now	3,930 ft
GRN Gordon, NE	209 nm out, 8 nm southeast of the line	no report just now	3,562 ft
PHP Philip, SD	289 nm out, 10 nm west of the line	no report just now	2,209 ft
MBG Mobridge, SD	389 nm out, 15 nm northwest of the line	no report just now	1,716 ft
ASY Ashley, ND	438 nm out, 7 nm southeast of the line	no report just now	2,034 ft
JMS Jamestown, ND	destination	no report just now	1,499 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 JMS when you get there the forecast at the estimated arrival, 3:44 am CDT (08:44 UTC)

JMS has no terminal forecast; use the nearest airport that does.

Temporary flight restrictions on the line or within 25 nm of it

No temporary flight restriction on or near this route right now.

Daylight

Sunset at DEN 6:24 pm MDT (00:24 UTC), at JMS 6:53 pm CDT (23:53 UTC) (civil twilight ends 7:23 pm CDT (00:23 UTC)). At 120 knots the arrival at JMS is before sunrise there (7:48 am CDT (12:48 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

Radar now, the southern Rockies · loop National Weather Service

Radar now, the northern Rockies · loop National Weather Service

Radar, the whole country · loop National Weather Service

Surface analysis now Weather Prediction Center

Forecast chart, 12 hours ahead Weather Prediction Center

Forecast chart, 24 hours ahead Weather Prediction Center

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, Jamestown Regional.