Billings Logan International to Washington Dulles International BIL → IAD

Warnings the route crosses SIGMETs and AIRMETs whose area the line passes through or comes within 25 nm of

• SIGMET C20C: thunderstorms (a convective SIGMET) up to 37,000 ft, moving from the southwest at 40 knots, until 9:55 am MDT (15:55 UTC). Near the route, 330 nm along the route.
  as issued

  WSUS32 KKCI 121355
  MKCC WST 121355
  CONVECTIVE SIGMET 20C
  VALID UNTIL 1555Z
  SD ND
  FROM 80W GFK-40WNW FAR-40W ABR-50ENE DPR-30S BIS-80W GFK
  AREA TS MOV FROM 21040KT. TOPS TO FL370.

• 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 first 609 nm of the route.
• AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the first 60 nm of the route.
• AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 30 nm of the route.
• 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 route from 1129 to 1349 nm out.
• AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, mist). Over the route from 1259 to 1399 nm out.
• AIRMET TANGO 3W: moderate turbulence below 18,000 ft (due to mountain wave) up to 6,000 ft. Over the route from 1339 to 1419 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 BIL.

Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first

Not fetched just now.

At IAD when you get there the forecast at the estimated arrival, 6:21 pm EDT (22:21 UTC)

Wind from the northwest at 7 knots, visibility more than 6 miles, scattered clouds at 5,000 feet VFR

The whole forecast for IAD

• From Mon 8:00 am EDT (12:00 UTC): wind from the north-northwest at 10 knots, gusting to 17, visibility 6 miles, mist, scattered clouds at 1,800 feet, a broken layer at 4,500 feet
• From Mon 9:00 am EDT (13:00 UTC): wind from the north-northwest at 10 knots, gusting to 18, visibility more than 6 miles, a broken layer at 2,000 feet, a broken layer at 3,500 feet
• From Mon 12:00 pm EDT (16:00 UTC): wind from the north-northwest at 13 knots, gusting to 21, visibility more than 6 miles, scattered clouds at 2,500 feet, a broken layer at 4,000 feet
• From Mon 2:00 pm EDT (18:00 UTC): wind from the north-northwest at 11 knots, gusting to 18, visibility more than 6 miles, a broken layer at 4,500 feet
• From Mon 5:00 pm EDT (21:00 UTC): wind from the northwest at 7 knots, visibility more than 6 miles, scattered clouds at 5,000 feet
• From Mon 8:00 pm EDT (00:00 UTC): wind from the west-northwest at 3 knots, visibility more than 6 miles, a few clouds at 5,000 feet
• From Tue 10:00 am EDT (14:00 UTC): wind from the south at 5 knots, visibility more than 6 miles, scattered clouds at 25,000 feet

The forecast for BIL, the departure

• From Mon 6:00 am MDT (12:00 UTC): wind from the north-northwest at 8 knots, visibility more than 6 miles, light rain snow, a broken layer at 1,200 feet, overcast at 2,200 feet
• From Mon 1:00 pm MDT (19:00 UTC): wind light and variable, visibility more than 6 miles, scattered clouds at 1,500 feet, overcast at 2,500 feet
• From Mon 6:00 pm MDT (00:00 UTC): wind from the east at 9 knots, visibility 6 miles, light drizzle, mist, a few clouds at 300 feet, overcast at 1,800 feet
• From Mon 10:00 pm MDT (04:00 UTC): wind from the east at 9 knots, visibility 4 miles, light drizzle, mist, scattered clouds at 300 feet, overcast at 1,200 feet
• From Tue 3:00 am MDT (09:00 UTC): wind light and variable, visibility 3 miles, light rain, mist, scattered clouds at 300 feet, a broken layer at 1,200 feet and more above

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

• 6/8829 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local 23 nm from the route, 1239 nm along the route · a VIP movement · today · ZOB
• 6/8587 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local 23 nm from the route, 1239 nm along the route · a VIP movement · today · ZOB
• 4/9383 WASHINGTON, DC., USA 8 nm from the route, at the destination end · security · ZDC
• 6/8600 Sterling, VA, Monday, October 12, 2026 through Monday, October 12, 2026 Local 4 nm from the route, at the destination end · a VIP movement · today · ZDC

Daylight

Sunset at BIL 6:32 pm MDT (00:32 UTC), at IAD 6:36 pm EDT (22:36 UTC) (civil twilight ends 7:02 pm EDT (23:02 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.