Washington Dulles International to Billings Logan International IAD → BIL

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

• SIGMET E11E: thunderstorms (a convective SIGMET) up to 34,000 ft, moving from the southwest at 20 knots, until 12:55 am EDT (04:55 UTC). Over the first 80 nm of the route.
  as issued

  WSUS31 KKCI 120255
  MKCE WST 120255
  CONVECTIVE SIGMET 11E
  VALID UNTIL 0455Z
  NY NJ PA DE MD VA DC WV AND DE NJ NY MD CT VA CSTL WTRS
  FROM 20NE JFK-90SE SIE-20NNW ORF-30ENE EKN-10S JST-20NE JFK
  AREA EMBD TS MOV FROM 24020KT. TOPS TO FL340.

• SIGMET 1C: thunderstorms (a convective SIGMET) up to 30,000 ft, moving from the southwest at 40 knots, until 12:55 am EDT (04:55 UTC). Over the route from 1199 to 1289 nm out.
  as issued

  WSUS32 KKCI 120255
  MKCC WST 120255
  CONVECTIVE SIGMET 1C
  VALID UNTIL 0455Z
  SD ND MT WY
  FROM 30WSW DIK-50NW DPR-60WNW RAP-50ENE SHR-30WSW DIK
  AREA TS MOV FROM 22040KT. TOPS TO FL300.

• 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 460 nm of the route.
• AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the first 160 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 160 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). Near the route, 789 nm along the route.
• 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 919 to 989 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 360 nm of the route.
• AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Near the route, 1259 nm along the route.
• AIRMET ZULU 2C: moderate icing up to 23,000 ft. Near the route, at the destination end.
• AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the last 0 nm of the route.
• AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the last 0 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.

At BIL when you get there the forecast at the estimated arrival, 10:14 am MDT (16:14 UTC)

BIL 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
• 6/8829 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local 23 nm from the route, 190 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, 190 nm along the route · a VIP movement · today · ZOB

Daylight

Sunset at IAD 6:36 pm EDT (22:36 UTC), at BIL 6:33 pm MDT (00:33 UTC) (civil twilight ends 7:03 pm MDT (01:03 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.