Dallas-Fort Worth International to Boeing Fld/King County International DFW → BFI
1,443 nautical miles (1,660 statute miles) northwest on a straight line, true course 315°, about 311° magnetic at the departure end (variation 4E). At 120 knots that is 12 h 02 min at the quickest height in today's winds (14,500 ft, no wind along the track), arriving about 4:29 pm PDT (23:29 UTC). Right now DFW is VFR, wind from the south (190°) at 11 knots; BFI is VFR, wind calm. 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: 158 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 2W: 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 99 to 289 nm out.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft (due to mountain wave) from 34,000 ft to 43,000 ft. Over the route from 438 to 786 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 488 to 527 nm out.
- AIRMET TANGO 2W: moderate turbulence below 18,000 ft (due to mountain wave) up to 22,000 ft. Over the route from 497 to 687 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 607 to 1264 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 647 to 726 nm out.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 647 to 1094 nm out.
- AIRMET TANGO 1W: moderate turbulence below 18,000 ft (due to mountain wave) up to 12,000 ft. Over the route from 696 to 726 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 route from 925 to 1184 nm out.
- AIRMET ZULU 2C: moderate icing up to 18,000 ft. Over the route from 1114 to 1254 nm out.
- AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the route from 1124 to 1413 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 DFW.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- urgent BE20 at 500 ft, 46 nm northeast, 4:34 am CDT (09:34 UTC): remarks: low-level wind shear 500FT a 10-knot loss of airspeed zkc fd dl. 308 nm along the route, 46 nm northeast of the line.
as filed, and in English
LBL UUA /OV LBL/TM 0934/FL005/TP BE20/RM LLWS 500FT +/-10KT ZKC FD DL
- Report
- an urgent report filed through LBL
- Where
- over LBL
- Time
- 09:34 UTC
- Height
- at 500 ft
- Aircraft
- BE20
- Remarks
- low-level wind shear 500FT a 10-knot loss of airspeed zkc fd dl
- B763 at 23,000 ft, 39 nm northeast, 5:26 am CDT (10:26 UTC): light chop turbulence, remarks: zdvwc. 587 nm along the route, 39 nm northeast of the line.
as filed, and in English
DEN UA /OV DEN278037/TM 1026/FL230/TP B763/TB OCNL LGT CHOP/RM ZDVWC
- Report
- a routine report filed through DEN
- Where
- 37 nm west (278°) of DEN
- Time
- 10:26 UTC
- Height
- at 23,000 ft
- Aircraft
- B763
- Turbulence
- occasional light chop
- Remarks
- zdvwc
Winds aloft along the route, and the time en route the forecast for use 08:00–15:00 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 14 forecast points nearest it (DAL, SPS, GAG, AMA, GCK, PUB, DEN, GJT, RKS, PIH, BOI, LWS, YKM, 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 | 230° at 11 kt | +1 kt | 12 °C | 119 kt | 12 h 08 min | 4:35 pm PDT (23:35 UTC) |
| 6,500 ft | 240° at 10 kt | +1 kt | 7 °C | 119 kt | 12 h 08 min | 4:35 pm PDT (23:35 UTC) |
| 8,500 ft | 240° at 13 kt | +4 kt | 5 °C | 116 kt | 12 h 26 min | 4:53 pm PDT (23:53 UTC) |
| 10,500 ft | 230° at 14 kt | +2 kt | 2 °C | 118 kt | 12 h 14 min | 4:41 pm PDT (23:41 UTC) |
| 12,500 ft | 220° at 16 kt | +1 kt | -1 °C | 119 kt | 12 h 08 min | 4:35 pm PDT (23:35 UTC) |
| 14,500 ft | 220° at 19 kt | 0 | -5 °C | 120 kt | 12 h 02 min | 4:29 pm PDT (23:29 UTC) |
| 16,500 ft | 220° at 23 kt | 0 | -10 °C | 120 kt | 12 h 02 min | 4:29 pm PDT (23:29 UTC) |
| 18,000 ft FL180 | 220° at 25 kt | 0 | -13 °C | 120 kt | 12 h 02 min | 4:29 pm PDT (23:29 UTC) |
| 24,000 ft FL240 | 230° at 31 kt | +4 kt | -23 °C | 116 kt | 12 h 26 min | 4:53 pm PDT (23:53 UTC) |
| 30,000 ft FL300 | 240° at 43 kt | +14 kt | -31 °C | 106 kt | 13 h 37 min | 6:04 pm PDT (01:04 UTC) |
| 34,000 ft FL340 | 250° at 45 kt | +19 kt | -37 °C | 101 kt | 14 h 17 min | 6:44 pm PDT (01:44 UTC) |
| 39,000 ft FL390 | 250° at 43 kt | +22 kt | -45 °C | 98 kt | 14 h 43 min | 7:10 pm PDT (02:10 UTC) |
Based on data from the 12th at 06:00 UTC; valid on the 12th at 12:00 UTC for use 08:00 to 15:00 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| DAL | used from 0 nm out; 34 nm from the line | 190/30 | 200/28 18° | 220/18 13° | 250/13 8° | 240/24 -6° | 270/20 -14° | 270/35 -29° | 290/34 -39° | 310/41 -51° |
| SPS | used from 50 nm out; 24 nm from the line | 220/35 | 220/31 18° | 230/16 14° | 230/10 8° | 250/18 -5° | 250/32 -16° | 260/51 -28° | 280/46 -38° | 300/50 -50° |
| GAG | used from 199 nm out; 54 nm from the line | 240/35 22° | 240/27 14° | 230/25 6° | 240/38 -7° | 230/44 -19° | 250/73 -28° | 270/66 -37° | 270/58 -49° | |
| AMA | used from 249 nm out; 60 nm from the line | 230/32 | 230/28 14° | 230/27 7° | 230/38 -6° | 230/50 -17° | 250/69 -28° | 260/62 -37° | 270/65 -49° | |
| GCK | used from 348 nm out; 98 nm from the line | 240/40 22° | 240/40 14° | 240/38 7° | 230/39 -7° | 230/45 -20° | 250/73 -28° | 260/74 -36° | 260/64 -49° | |
| PUB | used from 398 nm out; 65 nm from the line | 260/45 11° | 240/38 6° | 230/47 -8° | 230/51 -19° | 240/74 -29° | 240/82 -35° | 250/72 -48° | ||
| DEN | used from 547 nm out; 59 nm from the line | 270/24 11° | 230/13 5° | 230/48 -8° | 230/46 -20° | 230/63 -30° | 240/78 -36° | 240/78 -48° | ||
| GJT | used from 647 nm out; 91 nm from the line | 220/26 6° | 230/39 0° | 220/55 -13° | 230/60 -23° | 230/78 -31° | 230/80 -35° | 230/74 -44° | ||
| RKS | used from 696 nm out; 55 nm from the line | 250/9 | 230/21 -1° | 210/43 -14° | 220/59 -23° | 220/55 -32° | 220/53 -35° | 220/48 -44° | ||
| PIH | used from 846 nm out; 80 nm from the line | 070/8 | 150/19 1° | 180/32 -4° | 210/44 -17° | 210/37 -28° | 210/74 -31° | 220/68 -35° | 220/60 -43° | |
| BOI | used from 1045 nm out; 81 nm from the line | 320/11 1° | 280/8 -5° | 220/14 -11° | 200/60 -19° | 190/66 -31° | 210/46 -32° | 220/50 -33° | 220/43 -39° | |
| LWS | used from 1144 nm out; 71 nm from the line | L/V | 340/5 -3° | L/V -6° | 040/7 -10° | 100/23 -22° | 180/30 -31° | 190/11 -34° | 200/11 -36° | 220/23 -40° |
| YKM | used from 1293 nm out; 37 nm from the line | 360/6 | 360/11 -1° | 030/20 -7° | 040/21 -11° | 020/55 -18° | 010/84 -26° | 010/79 -40° | 010/45 -42° | 350/23 -42° |
| SEA | used from 1393 nm out; 23 nm from the line | 350/5 | 010/6 0° | 010/9 -4° | 010/27 -6° | 010/51 -15° | 360/58 -26° | 360/60 -41° | 350/55 -48° | 340/30 -45° |
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 |
|---|---|---|---|---|---|---|---|
| DFW Dallas-Fort Worth, TX | departure | VFR | from the south (190°) at 11 knots | 10+ mi | none | 606 ft | 5:53 am CDT (10:53 UTC) |
| SPS Wichita Falls, TX | 99 nm out, 5 nm southwest of the line, tower | VFR | from the south (180°) at 10 knots | 10+ mi | none | 1,019 ft | 10:52 UTC |
| AXS Altus, OK | 159 nm out, 3 nm south of the line | VFR | from the southeast (140°) at 10 knots | 10+ mi | none | 1,433 ft | 11:06 UTC |
| GUY Guymon, OK | 318 nm out, 12 nm northeast of the line | VFR | from the south-southwest (200°) at 11 knots | 10+ mi | none | 3,125 ft | 10:53 UTC |
| COS Colorado Springs, CO | 517 nm out, 8 nm northeast of the line, tower | VFR Sky: a few clouds at 20,000 feet | from the southwest (230°) at 11 knots, gusting to 22 | 10+ mi | none | 6,187 ft | 10:54 UTC |
| EGE Eagle, CO | 627 nm out, 20 nm southwest of the line, tower | VFR Sky: scattered clouds at 8,000 feet, overcast at 10,000 feet Weather: light rain | from the west (270°) at 6 knots | 10+ mi | 10,000 ft | 6,547 ft | 10:56 UTC |
| RKS Rock Springs, WY | 776 nm out, 11 nm northeast of the line | VFR Sky: overcast at 4,200 feet | from the southeast (140°) at 7 knots | 10+ mi | 4,200 ft | 6,764 ft | 10:54 UTC |
| PIH Pocatello, ID | 945 nm out, 19 nm southwest of the line, tower | marginal VFR Sky: a few clouds at 800 feet, a broken layer at 1,400 feet, overcast at 2,100 feet Weather: rain, mist | from the west (260°) at 11 knots | 5 mi | 1,400 ft | 4,451 ft | 11:15 UTC |
| MYL Mc Call, ID | 1144 nm out, 6 nm south of the line | marginal VFR Sky: a broken layer at 1,300 feet, a broken layer at 2,800 feet, overcast at 7,500 feet | calm | 10+ mi | 1,300 ft | 5,024 ft | 11:12 UTC |
| PSC Pasco, WA | 1293 nm out, 2 nm south of the line, tower | VFR Sky: overcast at 9,000 feet | from the north (350°) at 6 knots | 10+ mi | 9,000 ft | 410 ft | 10:53 UTC |
| YKM Yakima, WA | 1353 nm out, 16 nm southwest of the line, tower | VFR Sky: a broken layer at 9,000 feet | calm | 10+ mi | 9,000 ft | 1,098 ft | 10:53 UTC |
| BFI Seattle, WA | destination | VFR | calm | 10+ mi | none | 21 ft | 3:53 am PDT (10:53 UTC) |
The highest airport on this list sits at 6,764 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, 4:29 pm PDT (23:29 UTC)
Wind from the west-northwest at 5 knots, visibility more than 6 miles, clear skies VFR
The whole forecast for BFI
- From Mon 5:00 am PDT (12:00 UTC): wind light and variable, visibility more than 6 miles, clear skies
- From Mon 12:00 pm PDT (19:00 UTC): wind from the west-southwest at 4 knots, visibility more than 6 miles, clear skies
- From Mon 2:00 pm PDT (21:00 UTC): wind from the west-northwest at 5 knots, visibility more than 6 miles, clear skies
- From Mon 8:00 pm PDT (03:00 UTC): wind calm, visibility more than 6 miles, scattered clouds at 25,000 feet
- From Tue 4:00 am PDT (11:00 UTC): wind from the south-southeast at 4 knots, visibility more than 6 miles, overcast at 10,000 feet
The forecast for DFW, the departure
- From Mon 7:00 am CDT (12:00 UTC): wind from the south at 11 knots, visibility more than 6 miles, clear skies
- From Mon 10:00 am CDT (15:00 UTC): wind from the south at 12 knots, gusting to 23, visibility more than 6 miles, a few clouds at 15,000 feet
- From Mon 7:00 pm CDT (00:00 UTC): wind from the south at 11 knots, visibility more than 6 miles, a few clouds at 6,000 feet
- From Tue 4:00 am CDT (09:00 UTC): wind from the south at 11 knots, visibility more than 6 miles, a broken layer at 2,000 feet
- From Tue 11:00 am CDT (16:00 UTC): wind from the south at 11 knots, visibility more than 6 miles, scattered clouds at 2,000 feet, a broken layer at 3,500 feet
Temporary flight restrictions on the line or within 25 nm of it
- 9/2934 DALLAS, TX 11 nm from the route, at the departure end · a VIP movement · ZFW
- 6/8646 Arlington, TX, Thursday, October 15, 2026 through Friday, October 16, 2026 UTC 8 nm from the route, at the departure end · drones kept away from a public gathering · starts Thursday 15 October · ZFW
- 6/8784 LAKE GEORGE, CO, Sunday, October 11, 2026 through Tuesday, October 13, 2026 UTC 5 nm from the route, 547 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 13 October · ZDV
Daylight
Sunset at DFW 6:58 pm CDT (23:58 UTC), at BFI 6:25 pm PDT (01:25 UTC) (civil twilight ends 6:56 pm PDT (01:56 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: Dallas-Fort Worth International, Boeing Fld/King County International.