Ontario International to Washington Dulles International ONT → IAD

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

• SIGMET 4W: thunderstorms (a convective SIGMET) up to 28,000 ft, moving from the southwest at 20 knots, until 7:55 pm PDT (02:55 UTC). Over the route from 259 to 359 nm out.
  as issued

  WSUS33 KKCI 120055
  MKCW WST 120055
  CONVECTIVE SIGMET 4W
  VALID UNTIL 0255Z
  AZ
  FROM 60NE TBC-30S INW-100ESE BZA-70SE EED-50NW TBC-60NE TBC
  DMSHG AREA EMBD TS MOV FROM 21020KT. TOPS TO FL280.

• SIGMET 1W: thunderstorms (a convective SIGMET) up to 34,000 ft, moving from the southwest at 40 knots, until 7:55 pm PDT (02:55 UTC). Over the route from 439 to 668 nm out.
  as issued

  WSUS33 KKCI 120055
  MKCW WST 120055
  CONVECTIVE SIGMET 1W
  VALID UNTIL 0255Z
  CO NM WY AZ UT
  FROM 40NNW CHE-40WNW TBE-60WNW CME-40N SJN-40ESE MTU-40NNW CHE
  AREA SEV TS MOV FROM 23040KT. TOPS TO FL340.
  WIND GUSTS TO 60KT POSS.

• SIGMET 3E: thunderstorms (a convective SIGMET) up to 31,000 ft, moving from the west at 15 knots, until 7:55 pm PDT (02:55 UTC). Over the last 229 nm of the route.
  as issued

  WSUS31 KKCI 120055
  MKCE WST 120055
  CONVECTIVE SIGMET 3E
  VALID UNTIL 0255Z
  PA MD VA NC WV OH KY
  FROM 20NE APE-30SE JST-30SSE DCA-40SW ECG-70NNW HMV-20NE APE
  AREA TS MOV FROM 28015KT. TOPS TO FL310.

• AIRMET TANGO 1W: moderate turbulence below 18,000 ft (due to mountain wave) up to 12,000 ft. Over the first 150 nm of the route.
• AIRMET SIERRA 6E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 50 nm of the route.
• AIRMET ZULU 3C: moderate icing up to 22,000 ft. Over the route from 60 to 299 nm out.
• AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 169 to 389 nm out.
• AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 189 to 728 nm out.
• AIRMET SIERRA 2E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the route from 209 to 309 nm out.
• AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 458 to 628 nm out.
• AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 538 to 678 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 558 to 588 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 738 to 1136 nm out.
• 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 last 299 nm of the route.
• AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1754 to 1914 nm out.
• AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the last 100 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 ONT.

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, 9:32 am EDT (13:32 UTC)

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

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

• 4/3635 DISNEYLAND THEME PARK, ANAHEIM,, CA 19 nm from the route, at the departure end · security · ZLA
• 6/8891 Bullhead City, AZ, Wednesday, October 14, 2026 Local 2 nm from the route, 159 nm along the route · a VIP movement · starts Wednesday 14 October · ZLA
• 6/7634 CENTRALIA, MO, Monday, October 12, 2026 UTC 18 nm from the route, 1256 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · today · ZKC
• 6/8029 Cincinnati, OH, Friday, October 9, 2026 through Monday, October 12, 2026 Local on the route, 1605 nm along the route · a VIP movement · until 12 October · ZID
• 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 ONT 6:20 pm PDT (01:20 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.