Washington Dulles International to Nampa Municipal IAD → MAN
1,768 nautical miles (2,035 statute miles) west on a straight line, true course 292°, about 302° magnetic at the departure end (variation 10W). At 120 knots that is 15 h 31 min at the quickest height in today's winds (4,500 ft, a 6-knot headwind), arriving about 11:30 am MDT (17:30 UTC). 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 SIERRA 3E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the first 330 nm of the route.
- AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the first 120 nm of the route.
- AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 30 to 170 nm out.
- 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 699 to 849 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 route from 1109 to 1688 nm out.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the last 619 nm of the route.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 1269 to 1538 nm out.
- 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 1309 to 1498 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1329 to 1698 nm out.
- AIRMET ZULU 3C: moderate icing up to 22,000 ft. Over the last 410 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 IAD.
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 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 14 forecast points nearest it (EKN, AGC, CMH, FWA, JOT, DBQ, MCW, FSD, ONL, PIR, RAP, LND, PIH, BOI). 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 | 240° at 7 kt | +6 kt | 12 °C | 114 kt | 15 h 31 min | 11:30 am MDT (17:30 UTC) |
| 6,500 ft | 260° at 9 kt | +9 kt | 13 °C | 111 kt | 15 h 56 min | 11:55 am MDT (17:55 UTC) |
| 8,500 ft | 240° at 10 kt | +8 kt | 10 °C | 112 kt | 15 h 47 min | 11:46 am MDT (17:46 UTC) |
| 10,500 ft | 230° at 11 kt | +9 kt | 6 °C | 111 kt | 15 h 56 min | 11:55 am MDT (17:55 UTC) |
| 12,500 ft | 230° at 13 kt | +10 kt | 2 °C | 110 kt | 16 h 04 min | 12:03 pm MDT (18:03 UTC) |
| 14,500 ft | 230° at 16 kt | +13 kt | -2 °C | 107 kt | 16 h 31 min | 12:30 pm MDT (18:30 UTC) |
| 16,500 ft | 230° at 20 kt | +16 kt | -7 °C | 104 kt | 17 h | 12:59 pm MDT (18:59 UTC) |
| 18,000 ft FL180 | 230° at 22 kt | +18 kt | -10 °C | 102 kt | 17 h 20 min | 1:19 pm MDT (19:19 UTC) |
| 24,000 ft FL240 | 240° at 25 kt | +22 kt | -21 °C | 98 kt | 18 h 02 min | 2:01 pm MDT (20:01 UTC) |
| 30,000 ft FL300 | 240° at 32 kt | +28 kt | -35 °C | 92 kt | 19 h 13 min | 3:12 pm MDT (21:12 UTC) |
| 34,000 ft FL340 | 250° at 42 kt | +39 kt | -41 °C | 81 kt | 21 h 50 min | 5:49 pm MDT (23:49 UTC) |
| 39,000 ft FL390 | 260° at 49 kt | +48 kt | -48 °C | 72 kt | 24 h 33 min | 8:32 pm MDT (02:32 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| EKN | used from 0 nm out; 89 nm from the line | 270/18 13° | 310/5 7° | 140/7 3° | 210/16 -9° | 220/41 -20° | 210/57 -32° | 220/57 -38° | 230/49 -47° | |
| AGC | used from 100 nm out; 40 nm from the line | 140/12 | 350/10 12° | L/V 9° | L/V 3° | 200/11 -11° | 220/21 -22° | 220/47 -33° | 230/51 -39° | 230/45 -48° |
| CMH | used from 200 nm out; 43 nm from the line | 340/14 | 320/13 12° | 350/12 8° | 360/10 2° | 350/27 -10° | 340/20 -22° | 320/31 -35° | 270/25 -39° | 260/32 -48° |
| FWA | used from 300 nm out; 51 nm from the line | 350/9 | 350/24 15° | 360/25 9° | 360/29 4° | 350/31 -10° | 340/39 -22° | 330/40 -37° | 320/38 -43° | 320/48 -48° |
| JOT | used from 450 nm out; 41 nm from the line | 230/11 | 290/12 16° | 300/19 10° | 320/19 4° | 300/17 -9° | 330/31 -20° | 320/49 -37° | 320/53 -45° | 320/67 -49° |
| DBQ | used from 599 nm out; 20 nm from the line | 220/23 | 240/22 16° | 240/24 10° | 260/18 5° | 270/16 -8° | 290/27 -19° | 310/42 -35° | 320/55 -44° | 300/71 -52° |
| MCW | used from 699 nm out; 50 nm from the line | 200/35 | 240/33 18° | 250/20 10° | 260/10 6° | 270/18 -8° | 260/28 -19° | 280/30 -34° | 290/49 -43° | 280/70 -54° |
| FSD | used from 849 nm out; 50 nm from the line | 200/16 | 220/20 17° | 240/26 13° | 230/19 6° | 240/25 -9° | 240/28 -20° | 250/39 -33° | 250/44 -43° | 260/63 -52° |
| ONL | used from 949 nm out; 46 nm from the line | 200/20 17° | 230/26 14° | 240/21 7° | 250/27 -9° | 260/32 -19° | 240/44 -34° | 240/56 -41° | 250/62 -51° | |
| PIR | used from 1049 nm out; 61 nm from the line | L/V 17° | 230/13 12° | 220/22 6° | 250/31 -9° | 250/34 -21° | 240/50 -35° | 230/61 -43° | 240/62 -51° | |
| RAP | used from 1099 nm out; 68 nm from the line | 120/15 12° | 180/22 11° | 220/26 5° | 230/35 -9° | 240/40 -22° | 240/50 -37° | 240/51 -41° | 240/47 -47° | |
| LND | used from 1299 nm out; 120 nm from the line | 180/33 10° | 190/50 3° | 210/59 -9° | 200/50 -21° | 190/41 -34° | 230/55 -39° | 240/65 -47° | ||
| PIH | used from 1498 nm out; 90 nm from the line | 270/10 | 270/13 1° | 210/16 -2° | 200/56 -11° | 200/51 -23° | 200/68 -33° | 220/77 -37° | 230/73 -44° | |
| BOI | used from 1648 nm out; 82 nm from the line | 330/14 4° | 230/5 -2° | 220/20 -7° | 210/37 -20° | 200/59 -26° | 200/67 -34° | 210/73 -35° | 220/62 -41° |
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 |
|---|---|---|---|---|---|---|---|
| IAD Washington, DC | departure | no report just now | 312 ft | ||||
| MGW Morgantown, WV | 120 nm out, 3 nm southwest of the line, tower | no report just now | 1,243 ft | ||||
| VNW Van Wert, OH | 350 nm out, 2 nm south of the line | no report just now | 786 ft | ||||
| ARR Chicago/Aurora, IL | 529 nm out, 3 nm north of the line, tower | no report just now | 712 ft | ||||
| DBQ Dubuque, IA | 639 nm out, 16 nm north of the line, tower | no report just now | 1,076 ft | ||||
| ALO Waterloo, IA | 709 nm out, 9 nm north of the line, tower | no report just now | 873 ft | ||||
| ICR Winner, SD | 1039 nm out, 5 nm northwest of the line | no report just now | 2,032 ft | ||||
| CUT Custer, SD | 1209 nm out, 8 nm north of the line | no report just now | 5,619 ft | ||||
| WRL Worland, WY | 1399 nm out, 13 nm north of the line | no report just now | 4,251 ft | ||||
| JAC Jackson, WY | 1518 nm out, 10 nm south of the line, tower | no report just now | 6,451 ft | ||||
| SUN Hailey, ID | 1668 nm out, 12 nm south of the line, tower | no report just now | 5,319 ft | ||||
| MAN Nampa, ID | destination | no report just now | 2,537 ft |
The highest airport on this list sits at 6,451 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At MAN when you get there the forecast at the estimated arrival, 11:30 am MDT (17:30 UTC)
MAN has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
- 4/9383 WASHINGTON, DC., USA 8 nm from the route, at the departure end · security · ZDC
- 6/8600 Sterling, VA, Monday, October 12, 2026 through Monday, October 12, 2026 Local 4 nm from the route, at the departure end · a VIP movement · today · ZDC
Daylight
Sunset at IAD 6:36 pm EDT (22:36 UTC), at MAN 7:08 pm MDT (01:08 UTC) (civil twilight ends 7:36 pm MDT (01:36 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: Washington Dulles International, Nampa Municipal.