Boeing Fld/King County International to Sacramento Mather Airport BFI → MHR
541 nautical miles (622 statute miles) south on a straight line, true course 175°, about 160° magnetic at the departure end (variation 15E). At 120 knots that is 2 h 58 min at the quickest height in today's winds (24,000 ft, a 62-knot tailwind), arriving about 9:13 pm PDT (04:13 UTC), after sunset at the destination. 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: 33 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 TANGO 1W: moderate turbulence above 18,000 ft from 25,000 ft to 39,000 ft. Over the first 0 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 14,000 ft. Near the route, 177 nm along the route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 197 to 236 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 BFI.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- PC12 at 13,000 ft, 26 nm east, 5:42 pm PDT (00:42 UTC): remarks: zse. 39 nm along the route, 26 nm east of the line.
as filed, and in English
YKM UA /OV YKM270050/TM 0042/FL130/TP PC12/SK TOP130/RM -ZSE
- Report
- a routine report filed through YKM
- Where
- 50 nm west (270°) of YKM
- Time
- 00:42 UTC
- Height
- at 13,000 ft
- Aircraft
- PC12
- Sky
- TOP130
- Remarks
- zse
- PC12 at 15,000 ft, 26 nm east, 5:42 pm PDT (00:42 UTC): remarks: zse. 39 nm along the route, 26 nm east of the line.
as filed, and in English
YKM UA /OV YKM270050/TM 0042/FL150/TP PC12/SK TOP130/RM -ZSE
- Report
- a routine report filed through YKM
- Where
- 50 nm west (270°) of YKM
- Time
- 00:42 UTC
- Height
- at 15,000 ft
- Aircraft
- PC12
- Sky
- TOP130
- Remarks
- zse
- C182 at 8,000 ft, 8 nm west, 3:52 pm PDT (22:52 UTC): light rime icing, -2 °C. 108 nm along the route, 8 nm west of the line.
as filed, and in English
PDX UA /OV PDX040017/TM 2252/FL080/TP C182/TA M02/IC LGT RIME
- Report
- a routine report filed through PDX
- Where
- 17 nm northeast (040°) of PDX
- Time
- 22:52 UTC
- Height
- at 8,000 ft
- Aircraft
- C182
- Temperature
- −2 °C
- Icing
- light rime
- E175 at 6,500 ft, 32 nm east, 5:28 pm PDT (00:28 UTC): a broken layer above 6,500 ft. 197 nm along the route, 32 nm east of the line.
as filed, and in English
RDM UA /OV RDM/TM 0028/FL065/TP E175/SK BKN065-TOPSUNKN
- Report
- a routine report filed through RDM
- Where
- over RDM
- Time
- 00:28 UTC
- Height
- at 6,500 ft
- Aircraft
- E175
- Sky
- a broken layer from 6,500 ft, tops unknown
- E75L at 9,500 ft, 32 nm east, 4:07 pm PDT (23:07 UTC): light rime icing from 7,000 ft to 9,500 ft, a broken layer above 7,300 ft, -2 °C, remarks: during the descent runway 5. 197 nm along the route, 32 nm east of the line.
as filed, and in English
RDM UA /OV RDM/TM 2307/FL095/TP E75L/SK BKN073-TOPSUNKN/TA M2/IC LGT RIME 095-070/RM DURD RWY 5
- Report
- a routine report filed through RDM
- Where
- over RDM
- Time
- 23:07 UTC
- Height
- at 9,500 ft
- Aircraft
- E75L
- Sky
- a broken layer from 7,300 ft, tops unknown
- Temperature
- −2 °C
- Icing
- light rime from 9,500 ft to 7,000 ft
- Remarks
- during the descent runway 5
- E75L at 11,000 ft, 39 nm east, 5:36 pm PDT (00:36 UTC): trace to light rime icing from 10,500 ft to 11,500 ft, -8 °C, remarks: durc-zse. 206 nm along the route, 39 nm east of the line.
as filed, and in English
RDM UA /OV DSD090015/TM 0036/FL110/TP E75L/TA M08/IC TRACE-LGT RIME 105-115/RM DURC-ZSE
- Report
- a routine report filed through RDM
- Where
- 15 nm east (090°) of DSD
- Time
- 00:36 UTC
- Height
- at 11,000 ft
- Aircraft
- E75L
- Temperature
- −8 °C
- Icing
- trace-lgt rime from 10,500 ft to 11,500 ft
- Remarks
- durc-zse
- E75L at 9,000 ft, 27 nm east, 4:05 pm PDT (23:05 UTC): light rime icing, -6 °C, remarks: zse. 216 nm along the route, 27 nm east of the line.
as filed, and in English
RDM UA /OV DSD155012/TM 2305/FL090/TP E75L/TA M06/IC LGT RIME/RM ZSE
- Report
- a routine report filed through RDM
- Where
- 12 nm southeast (155°) of DSD
- Time
- 23:05 UTC
- Height
- at 9,000 ft
- Aircraft
- E75L
- Temperature
- −6 °C
- Icing
- light rime
- Remarks
- zse
- B772 at 37,000 ft, 14 nm west, 4:31 pm PDT (23:31 UTC): light to moderate turbulence, remarks: zse. 344 nm along the route, 14 nm west of the line.
as filed, and in English
LMT UA /OV LMT186024/TM 2331/FL370/TP B772/TB CONS LGT-MOD/RM ZSE
- Report
- a routine report filed through LMT
- Where
- 24 nm south (186°) of LMT
- Time
- 23:31 UTC
- Height
- at 37,000 ft
- Aircraft
- B772
- Turbulence
- continuous light to moderate
- Remarks
- zse
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 eastbound cruising heights for this course (VFR: odd thousands plus 500 ft; above 18,000 ft the forecast levels), with the wind averaged along the line from the 6 forecast points nearest it (SEA, PDX, RDM, SIY, RBL, SAC). A plus sign is a headwind, a minus sign a tailwind.
| Height | Average wind | Head- or tailwind | Temperature | Ground speed | Time en route | Arrival |
|---|---|---|---|---|---|---|
| 3,500 ft | 340° at 7 kt | −7 kt | 127 kt | 4 h 16 min | 10:31 pm PDT (05:31 UTC) | |
| 5,500 ft | 010° at 11 kt | −11 kt | 0 °C | 131 kt | 4 h 08 min | 10:23 pm PDT (05:23 UTC) |
| 7,500 ft | 020° at 12 kt | −11 kt | -2 °C | 131 kt | 4 h 08 min | 10:23 pm PDT (05:23 UTC) |
| 9,500 ft | 030° at 14 kt | −12 kt | -6 °C | 132 kt | 4 h 06 min | 10:21 pm PDT (05:21 UTC) |
| 11,500 ft | 020° at 14 kt | −13 kt | -9 °C | 133 kt | 4 h 04 min | 10:19 pm PDT (05:19 UTC) |
| 13,500 ft | 010° at 21 kt | −20 kt | -12 °C | 140 kt | 3 h 52 min | 10:07 pm PDT (05:07 UTC) |
| 15,500 ft | 010° at 30 kt | −28 kt | -15 °C | 148 kt | 3 h 39 min | 9:54 pm PDT (04:54 UTC) |
| 17,500 ft | 010° at 38 kt | −37 kt | -18 °C | 157 kt | 3 h 27 min | 9:42 pm PDT (04:42 UTC) |
| 18,000 ft FL180 | 010° at 41 kt | −39 kt | -19 °C | 159 kt | 3 h 24 min | 9:39 pm PDT (04:39 UTC) |
| 24,000 ft FL240 | 360° at 63 kt | −62 kt | -25 °C | 182 kt | 2 h 58 min | 9:13 pm PDT (04:13 UTC) |
| 30,000 ft FL300 | 350° at 52 kt | −52 kt | -34 °C | 172 kt | 3 h 09 min | 9:24 pm PDT (04:24 UTC) |
| 34,000 ft FL340 | 340° at 36 kt | −34 kt | -36 °C | 154 kt | 3 h 31 min | 9:46 pm PDT (04:46 UTC) |
| 39,000 ft FL390 | 310° at 23 kt | −16 kt | -41 °C | 136 kt | 3 h 59 min | 10:14 pm PDT (05:14 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| SEA | used from 0 nm out; 20 nm from the line | 360/9 | 350/10 1° | 010/10 -5° | 030/20 -11° | 020/60 -17° | 010/86 -26° | 360/90 -40° | 010/68 -42° | 360/31 -43° |
| PDX | used from 49 nm out; 47 nm from the line | 330/7 | 360/13 0° | 040/22 -6° | 030/23 -12° | 020/64 -18° | 010/93 -25° | 010/91 -39° | 360/62 -40° | 350/41 -43° |
| RDM | used from 147 nm out; 43 nm from the line | 010/15 -2° | 030/21 -8° | 020/26 -12° | 020/46 -22° | 010/72 -27° | 360/47 -34° | 340/31 -35° | 320/20 -40° | |
| SIY | used from 295 nm out; 44 nm from the line | 020/15 4° | 020/16 -5° | 010/11 -10° | 010/47 -18° | 360/70 -25° | 350/58 -34° | 330/46 -35° | 300/23 -40° | |
| RBL | used from 393 nm out; 44 nm from the line | 350/10 | 350/7 6° | L/V -1° | 320/6 -8° | 340/24 -18° | 340/38 -24° | 330/32 -30° | 300/25 -34° | 270/37 -40° |
| SAC | used from 491 nm out; 28 nm from the line | 270/5 | L/V 5° | L/V -1° | 240/11 -5° | 250/22 -15° | 270/25 -24° | 260/31 -27° | 240/39 -33° | 240/39 -42° |
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 |
|---|---|---|---|---|---|---|---|
| BFI Seattle, WA | departure | no report just now | 21 ft | ||||
| PLU Puyallup, WA | 29 nm out, 4 nm northwest of the line | no report just now | 537 ft | ||||
| CZK Cascade Locks, OR | 108 nm out, 9 nm southeast of the line | no report just now | 151 ft | ||||
| TTD Portland, OR | 118 nm out, 15 nm west of the line, tower | no report just now | 38 ft | ||||
| LMT Klamath Falls, OR | 324 nm out, 3 nm west of the line, tower | no report just now | 4,095 ft | ||||
| CIC Chico, CA | 462 nm out, 20 nm west of the line, tower | no report just now | 240 ft | ||||
| LHM Lincoln, CA | 521 nm out, 2 nm northwest of the line | no report just now | 121 ft | ||||
| MHR Sacramento, CA | destination | no report just now | 98 ft |
The highest airport on this list sits at 4,095 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At MHR when you get there the forecast at the estimated arrival, 9:13 pm PDT (04:13 UTC)
MHR has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
- 6/3475 BEALE AFB, CA, Sunday, March 8, 2026 through Sunday, November 1, 2026 Local on the route, 501 nm along the route · security · until 1 November · ZOA
- 6/6740 SACRAMENTO, CA, Thursday, October 8, 2026 through Sunday, October 11, 2026 Local on the route, at the destination end · air shows/sports · ended 11 October · ZOA
Daylight
Sunset at BFI 6:27 pm PDT (01:27 UTC), at MHR 6:31 pm PDT (01:31 UTC) (civil twilight ends 6:58 pm PDT (01:58 UTC)). At 120 knots the arrival at MHR is after sunset there (6:32 pm PDT (01:32 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: Boeing Fld/King County International, Sacramento Mather Airport.