Sacramento Mather Airport to Boeing Fld/King County International MHR → BFI
541 nautical miles (622 statute miles) north on a straight line, true course 356°, about 343° magnetic at the departure end (variation 13E). At 120 knots that is 4 h 50 min at the quickest height in today's winds (4,500 ft, a 8-knot headwind), arriving about 3:58 am PDT (10:58 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 18,000 ft to 39,000 ft. Over the whole 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 MHR.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- B738 at 30,000 ft, 37 nm east, 8:45 pm PDT (03:45 UTC): light to moderate turbulence, remarks: zse. 197 nm along the route, 37 nm east of the line.
as filed, and in English
LKV UA /OV LKV180040/TM 0345/FL300/TP B738/TB CONS LGT OCNL MOD/RM ZSE
- Report
- a routine report filed through LKV
- Where
- 40 nm south (180°) of LKV
- Time
- 03:45 UTC
- Height
- at 30,000 ft
- Aircraft
- B738
- Turbulence
- continuous light occasional moderate
- Remarks
- zse
- E75L at 10,000 ft, 27 nm west, 10:40 pm PDT (05:40 UTC): light to moderate chop turbulence, remarks: during the descent rnav-z runway 32 100-60. 226 nm along the route, 27 nm west of the line.
as filed, and in English
MFR UA /OV ACLOB/TM 0540/FL100/TP E75L/TB LGT-MOD CHOP/RM DURD RNAV-Z RWY32 100-60
- Report
- a routine report filed through MFR
- Where
- aclob
- Time
- 05:40 UTC
- Height
- at 10,000 ft
- Aircraft
- E75L
- Turbulence
- light to moderate chop
- Remarks
- during the descent rnav-z runway 32 100-60
- B737 at 10,000 ft, 32 nm east, 9:25 pm PDT (04:25 UTC): no icing, remarks: during the descent runway 5. 344 nm along the route, 32 nm east of the line.
as filed, and in English
RDM UA /OV RDM/TM 0425/FL100/TP B737/TA UNKN/IC NEG/RM DURD RWY 5
- Report
- a routine report filed through RDM
- Where
- over RDM
- Time
- 04:25 UTC
- Height
- at 10,000 ft
- Aircraft
- B737
- Temperature
- UNKN
- Icing
- none
- Remarks
- during the descent runway 5
Winds aloft along the route, and the time en route the forecast for use 02:00–09:00 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 6 forecast points nearest it (SAC, RBL, SIY, RDM, PDX, SEA). 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 | 040° at 11 kt | +8 kt | 0 °C | 112 kt | 4 h 50 min | 3:58 am PDT (10:58 UTC) |
| 6,500 ft | 040° at 11 kt | +9 kt | 0 °C | 111 kt | 4 h 52 min | 4:00 am PDT (11:00 UTC) |
| 8,500 ft | 030° at 15 kt | +12 kt | -4 °C | 108 kt | 5 h 01 min | 4:09 am PDT (11:09 UTC) |
| 10,500 ft | 020° at 19 kt | +18 kt | -7 °C | 102 kt | 5 h 18 min | 4:26 am PDT (11:26 UTC) |
| 12,500 ft | 010° at 26 kt | +25 kt | -10 °C | 95 kt | 5 h 42 min | 4:50 am PDT (11:50 UTC) |
| 14,500 ft | 010° at 38 kt | +38 kt | -12 °C | 82 kt | 6 h 36 min | 5:44 am PDT (12:44 UTC) |
| 16,500 ft | 010° at 51 kt | +50 kt | -14 °C | 70 kt | 7 h 44 min | 6:52 am PDT (13:52 UTC) |
| 18,000 ft FL180 | 010° at 60 kt | +59 kt | -16 °C | 61 kt | 8 h 52 min | 8:00 am PDT (15:00 UTC) |
| 24,000 ft FL240 | 360° at 84 kt | +83 kt | -24 °C | 37 kt | 14 h 37 min | 1:45 pm PDT (20:45 UTC) |
| 30,000 ft FL300 | 360° at 74 kt | +74 kt | -37 °C | 46 kt | 11 h 46 min | 10:54 am PDT (17:54 UTC) |
| 34,000 ft FL340 | 350° at 41 kt | +41 kt | -40 °C | 79 kt | 6 h 51 min | 5:59 am PDT (12:59 UTC) |
| 39,000 ft FL390 | 290° at 19 kt | +9 kt | -41 °C | 111 kt | 4 h 52 min | 4:00 am PDT (11:00 UTC) |
Based on data from the 12th at 00:00 UTC; valid on the 12th at 06:00 UTC for use 02:00 to 09:00 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| SAC | used from 0 nm out; 28 nm from the line | 110/6 | L/V 4° | 010/11 -2° | 350/11 -7° | 340/24 -16° | 360/44 -23° | 330/24 -30° | 270/21 -35° | 230/23 -43° |
| RBL | used from 49 nm out; 44 nm from the line | 020/16 | 360/6 5° | L/V -2° | 340/10 -8° | 360/59 -15° | 360/87 -23° | 360/68 -35° | 330/28 -37° | 260/26 -42° |
| SIY | used from 147 nm out; 45 nm from the line | 050/17 1° | 010/16 -5° | 360/26 -8° | 360/71 -14° | 360/94 -23° | 360/88 -37° | 350/41 -40° | 290/17 -41° | |
| RDM | used from 246 nm out; 77 nm from the line | 040/17 -1° | 030/31 -8° | 010/29 -12° | 010/61 -19° | 360/95 -25° | 360/82 -36° | 360/40 -37° | 310/19 -40° | |
| PDX | used from 393 nm out; 24 nm from the line | L/V | 030/7 1° | 020/12 -6° | 020/29 -9° | 010/69 -16° | 010/81 -25° | 360/83 -40° | 360/67 -46° | 320/29 -42° |
| SEA | used from 491 nm out; 20 nm from the line | 050/7 | 050/11 1° | 050/12 -5° | 030/31 -7° | 010/61 -15° | 010/69 -26° | 360/73 -40° | 360/62 -47° | 330/21 -43° |
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 |
|---|---|---|---|---|---|---|---|
| MHR Sacramento, CA | departure | no report just now | 98 ft | ||||
| LHM Lincoln, CA | 20 nm out, 2 nm northwest of the line | no report just now | 121 ft | ||||
| CIC Chico, CA | 79 nm out, 20 nm west of the line, tower | no report just now | 240 ft | ||||
| LMT Klamath Falls, OR | 216 nm out, 3 nm west of the line, tower | no report just now | 4,095 ft | ||||
| TTD Portland, OR | 423 nm out, 15 nm west of the line, tower | no report just now | 38 ft | ||||
| CZK Cascade Locks, OR | 433 nm out, 9 nm southeast of the line | no report just now | 151 ft | ||||
| PLU Puyallup, WA | 511 nm out, 4 nm northwest of the line | no report just now | 537 ft | ||||
| BFI Seattle, WA | destination | no report just now | 21 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 BFI when you get there the forecast at the estimated arrival, 3:58 am PDT (10:58 UTC)
BFI 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, 29 nm along the route · security · until 1 November · ZOA
Daylight
Sunset at MHR 6:31 pm PDT (01:31 UTC), at BFI 6:27 pm PDT (01:27 UTC) (civil twilight ends 6:58 pm PDT (01:58 UTC)). At 120 knots the arrival at BFI is before sunrise there (7:23 am PDT (14:23 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: Sacramento Mather Airport, Boeing Fld/King County International.