Washington Dulles International to St. Louis Lambert International IAD → STL
603 nautical miles (694 statute miles) west on a straight line, true course 273°, about 283° magnetic at the departure end (variation 10W). At 120 knots that is 5 h 35 min at the quickest height in today's winds (8,500 ft, a 12-knot headwind), arriving about 9:38 am CDT (14:38 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: 1,429 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, fog). Over the first 455 nm of the route.
- AIRMET TANGO 3W: moderate turbulence below 18,000 ft (due to mountain wave) up to 6,000 ft. Over the first 129 nm of the route.
- AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, mist). Over the route from 49 to 198 nm out.
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 08:00–15:00 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 7 forecast points nearest it (EKN, CRW, CMH, CVG, IND, EVV, STL). 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 | 310° at 18 kt | +15 kt | 10 °C | 105 kt | 5 h 45 min | 9:48 am CDT (14:48 UTC) |
| 6,500 ft | 320° at 18 kt | +13 kt | 13 °C | 107 kt | 5 h 38 min | 9:41 am CDT (14:41 UTC) |
| 8,500 ft | 320° at 18 kt | +12 kt | 9 °C | 108 kt | 5 h 35 min | 9:38 am CDT (14:38 UTC) |
| 10,500 ft | 320° at 20 kt | +13 kt | 6 °C | 107 kt | 5 h 38 min | 9:41 am CDT (14:41 UTC) |
| 12,500 ft | 320° at 22 kt | +15 kt | 3 °C | 105 kt | 5 h 45 min | 9:48 am CDT (14:48 UTC) |
| 14,500 ft | 320° at 25 kt | +18 kt | -1 °C | 102 kt | 5 h 55 min | 9:58 am CDT (14:58 UTC) |
| 16,500 ft | 310° at 28 kt | +20 kt | -4 °C | 100 kt | 6 h 02 min | 10:05 am CDT (15:05 UTC) |
| 18,000 ft FL180 | 310° at 31 kt | +22 kt | -7 °C | 98 kt | 6 h 09 min | 10:12 am CDT (15:12 UTC) |
| 24,000 ft FL240 | 320° at 34 kt | +24 kt | -20 °C | 96 kt | 6 h 17 min | 10:20 am CDT (15:20 UTC) |
| 30,000 ft FL300 | 320° at 42 kt | +26 kt | -34 °C | 94 kt | 6 h 25 min | 10:28 am CDT (15:28 UTC) |
| 34,000 ft FL340 | 320° at 56 kt | +36 kt | -41 °C | 84 kt | 7 h 11 min | 11:14 am CDT (16:14 UTC) |
| 39,000 ft FL390 | 310° at 50 kt | +35 kt | -50 °C | 85 kt | 7 h 06 min | 11:09 am CDT (16:09 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| EKN | used from 0 nm out; 87 nm from the line | 330/20 10° | 350/29 7° | 340/32 2° | 340/44 -8° | 350/50 -21° | 350/63 -35° | 340/69 -40° | 330/42 -50° | |
| CRW | used from 148 nm out; 44 nm from the line | 320/17 | 340/23 12° | 340/32 8° | 340/35 4° | 330/40 -7° | 340/45 -20° | 340/57 -34° | 340/64 -42° | 320/38 -50° |
| CMH | used from 247 nm out; 61 nm from the line | 320/12 | 340/26 15° | 340/22 9° | 320/24 3° | 320/32 -7° | 320/36 -20° | 330/42 -35° | 320/59 -44° | 320/57 -50° |
| CVG | used from 297 nm out; 15 nm from the line | 300/19 | 310/23 15° | 320/20 9° | 310/18 3° | 300/26 -6° | 290/36 -19° | 310/32 -34° | 310/53 -43° | 310/61 -51° |
| IND | used from 396 nm out; 46 nm from the line | 270/22 | 290/19 15° | 270/19 8° | 270/18 4° | 290/28 -7° | 280/35 -20° | 270/37 -34° | 300/51 -42° | 300/61 -51° |
| EVV | used from 445 nm out; 52 nm from the line | 270/25 | 290/17 15° | 260/10 8° | 270/16 5° | 280/29 -6° | 280/33 -19° | 290/38 -33° | 300/53 -41° | 310/54 -51° |
| STL | used from 544 nm out; 35 nm from the line | 250/26 | 240/21 15° | 240/22 11° | 250/23 6° | 270/28 -7° | 260/30 -19° | 280/52 -31° | 280/57 -40° | 300/57 -49° |
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 | ||||
| FRR Front Royal, VA | 40 nm out, 4 nm southeast of the line | no report just now | 703 ft | ||||
| EKN Elkins, WV | 109 nm out, 8 nm southwest of the line | no report just now | 1,987 ft | ||||
| CKB Clarksburg, WV | 129 nm out, 16 nm north of the line, tower | no report just now | 1,223 ft | ||||
| PKB Parkersburg, WV | 188 nm out, 19 nm north of the line, tower | no report just now | 858 ft | ||||
| ILN Wilmington, OH | 297 nm out, 24 nm north of the line, tower | no report just now | 1,076 ft | ||||
| CVG Covington, KY | 336 nm out, 2 nm north of the line, tower | no report just now | 896 ft | ||||
| BAK Columbus, IN | 396 nm out, 17 nm north of the line, tower | no report just now | 656 ft | ||||
| BMG Bloomington, IN | 425 nm out, 12 nm north of the line, tower | no report just now | 845 ft | ||||
| OLY Olney-Noble, IL | 504 nm out, 10 nm southeast of the line | no report just now | 482 ft | ||||
| ALN Alton/St Louis, IL | 584 nm out, 8 nm northwest of the line, tower | no report just now | 543 ft | ||||
| STL St Louis, MO | destination | no report just now | 617 ft |
The highest airport on this list sits at 1,987 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At STL when you get there the forecast at the estimated arrival, 9:38 am CDT (14:38 UTC)
STL 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
- 6/8029 Cincinnati, OH, Friday, October 9, 2026 through Monday, October 12, 2026 Local on the route, 336 nm along the route · a VIP movement · until 12 October · ZID
Daylight
Sunset at IAD 6:36 pm EDT (22:36 UTC), at STL 6:27 pm CDT (23:27 UTC) (civil twilight ends 6:54 pm CDT (23:54 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, St. Louis Lambert International.