Boeing Fld/King County International to Baltimore/Washington International Thurgood Marshall BFI → BWI
2,023 nautical miles (2,328 statute miles) east on a straight line, true course 087°, about 072° magnetic at the departure end (variation 15E). At 120 knots that is 12 h 20 min at the quickest height in today's winds (39,000 ft, a 44-knot tailwind), arriving about 8:16 pm EDT (00:16 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: 7 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
- SIGMET C18C: thunderstorms (a convective SIGMET) up to 36,000 ft, moving from the southwest at 40 knots, until 6:55 am PDT (13:55 UTC). Over the route from 877 to 947 nm out.
as issued
WSUS32 KKCI 121155 MKCC WST 121155 CONVECTIVE SIGMET 18C VALID UNTIL 1355Z SD ND FROM 50NE BIS-70W FAR-40N PIR-40N DPR-50NE BIS AREA TS MOV FROM 22040KT. TOPS TO FL360.
- AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the route from 30 to 379 nm out.
- AIRMET ZULU 2C: moderate icing up to 18,000 ft. Over the route from 199 to 648 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 229 to 548 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 369 to 1126 nm out.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 658 to 748 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 419 nm of the route.
- AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, mist). Over the route from 1844 to 1963 nm out.
- AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 24,000 ft to 33,000 ft. Over the last 159 nm of the route.
- AIRMET TANGO 3W: moderate turbulence below 18,000 ft (due to mountain wave) up to 6,000 ft. Over the route from 1904 to 1983 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
Not fetched just now.
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 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 18 forecast points nearest it (SEA, YKM, GEG, GPI, GTF, BIL, MLS, DIK, ABR, AXN, MSP, LSE, GRB, MKG, FWA, CLE, AGC, PSB). 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 | 270° at 9 kt | −9 kt | 129 kt | 15 h 41 min | 11:37 pm EDT (03:37 UTC) | |
| 5,500 ft | 280° at 6 kt | −6 kt | 2 °C | 126 kt | 16 h 03 min | 11:59 pm EDT (03:59 UTC) |
| 7,500 ft | 270° at 7 kt | −8 kt | 8 °C | 128 kt | 15 h 48 min | 11:44 pm EDT (03:44 UTC) |
| 9,500 ft | 270° at 10 kt | −9 kt | 4 °C | 129 kt | 15 h 41 min | 11:37 pm EDT (03:37 UTC) |
| 11,500 ft | 270° at 12 kt | −12 kt | 1 °C | 132 kt | 15 h 20 min | 11:16 pm EDT (03:16 UTC) |
| 13,500 ft | 270° at 14 kt | −14 kt | -3 °C | 134 kt | 15 h 06 min | 11:02 pm EDT (03:02 UTC) |
| 15,500 ft | 270° at 15 kt | −15 kt | -7 °C | 135 kt | 14 h 59 min | 10:55 pm EDT (02:55 UTC) |
| 17,500 ft | 270° at 16 kt | −17 kt | -11 °C | 137 kt | 14 h 46 min | 10:42 pm EDT (02:42 UTC) |
| 18,000 ft FL180 | 270° at 17 kt | −17 kt | -12 °C | 137 kt | 14 h 46 min | 10:42 pm EDT (02:42 UTC) |
| 24,000 ft FL240 | 270° at 21 kt | −21 kt | -24 °C | 141 kt | 14 h 21 min | 10:17 pm EDT (02:17 UTC) |
| 30,000 ft FL300 | 270° at 24 kt | −24 kt | -36 °C | 144 kt | 14 h 03 min | 9:59 pm EDT (01:59 UTC) |
| 34,000 ft FL340 | 270° at 34 kt | −35 kt | -41 °C | 155 kt | 13 h 03 min | 8:59 pm EDT (00:59 UTC) |
| 39,000 ft FL390 | 270° at 42 kt | −44 kt | -47 °C | 164 kt | 12 h 20 min | 8:16 pm EDT (00:16 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| SEA | used from 0 nm out; 26 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° |
| YKM | used from 50 nm out; 60 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° |
| GEG | used from 100 nm out; 69 nm from the line | 060/7 -2° | 070/12 -6° | 050/8 -8° | 120/11 -21° | 110/18 -33° | 030/22 -37° | 040/6 -38° | 240/7 -41° | |
| GPI | used from 249 nm out; 69 nm from the line | 090/8 -4° | 140/7 -7° | 090/10 -8° | 110/10 -19° | 210/25 -30° | 200/24 -40° | 210/31 -39° | 210/35 -42° | |
| GTF | used from 349 nm out; 70 nm from the line | L/V | L/V -7° | 240/8 -8° | 240/30 -14° | 240/40 -28° | 210/52 -38° | 210/76 -38° | 220/72 -43° | |
| BIL | used from 548 nm out; 80 nm from the line | 300/14 | 270/19 -2° | 260/26 -2° | 220/28 -13° | 210/51 -25° | 220/56 -33° | 220/61 -39° | 220/72 -45° | |
| MLS | used from 598 nm out; 58 nm from the line | 290/17 -1° | 250/18 0° | 230/25 0° | 220/31 -11° | 220/32 -24° | 220/50 -32° | 220/60 -38° | 230/71 -46° | |
| DIK | used from 748 nm out; 29 nm from the line | 190/12 5° | 230/29 7° | 220/33 1° | 220/43 -11° | 210/47 -23° | 220/53 -33° | 240/56 -40° | 250/72 -47° | |
| ABR | used from 897 nm out; 72 nm from the line | 080/12 | 210/12 17° | 220/22 12° | 230/26 5° | 220/28 -10° | 230/41 -21° | 250/36 -36° | 260/47 -39° | 260/63 -47° |
| AXN | used from 1047 nm out; 52 nm from the line | 110/6 | 260/10 16° | 240/17 12° | 250/20 5° | 260/29 -10° | 260/35 -22° | 260/29 -38° | 270/48 -41° | 270/61 -48° |
| MSP | used from 1146 nm out; 42 nm from the line | 250/12 | 250/17 17° | 240/26 12° | 250/26 5° | 280/26 -9° | 280/32 -22° | 270/37 -38° | 280/47 -41° | 280/55 -48° |
| LSE | used from 1246 nm out; 44 nm from the line | 250/25 | 240/21 17° | 240/28 11° | 250/28 5° | 280/24 -10° | 280/31 -21° | 260/35 -37° | 270/45 -43° | 280/59 -47° |
| GRB | used from 1395 nm out; 64 nm from the line | 250/32 | 250/22 17° | 240/18 8° | 280/21 6° | 280/34 -11° | 280/35 -21° | 280/39 -37° | 270/52 -45° | 290/60 -49° |
| MKG | used from 1445 nm out; 64 nm from the line | 260/28 | 260/18 15° | 250/16 9° | 260/22 4° | 280/31 -9° | 270/35 -21° | 270/44 -35° | 270/42 -45° | 290/61 -51° |
| FWA | used from 1595 nm out; 80 nm from the line | 270/20 | 300/16 15° | 290/14 10° | 280/17 3° | 290/25 -7° | 280/30 -19° | 280/34 -35° | 290/48 -44° | 300/64 -52° |
| CLE | used from 1645 nm out; 82 nm from the line | 310/7 | 350/20 14° | 340/16 9° | 320/21 2° | 320/32 -8° | 330/34 -20° | 330/45 -36° | 320/60 -45° | 320/64 -51° |
| AGC | used from 1794 nm out; 40 nm from the line | 340/11 | 350/12 11° | 360/25 7° | 340/30 2° | 340/41 -8° | 340/44 -21° | 350/59 -36° | 340/68 -42° | 340/50 -51° |
| PSB | used from 1894 nm out; 58 nm from the line | 020/21 12° | 360/28 7° | 360/29 1° | 350/33 -10° | 350/42 -22° | 350/49 -37° | 340/63 -43° | 350/39 -52° |
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 | ||||
| GEG Spokane, WA | 189 nm out, 4 nm northeast of the line, tower | no report just now | 2,385 ft | ||||
| THM Thompson Falls, MT | 289 nm out, 5 nm northwest of the line | no report just now | 2,467 ft | ||||
| GTF Great Falls, MT | 439 nm out, 8 nm northeast of the line, tower | no report just now | 3,680 ft | ||||
| DIK Dickinson, ND | 797 nm out, 18 nm north of the line | no report just now | 2,592 ft | ||||
| ASY Ashley, ND | 947 nm out, 5 nm north of the line | no report just now | 2,034 ft | ||||
| FCM Minneapolis, MN | 1206 nm out, 5 nm north of the line, tower | no report just now | 906 ft | ||||
| CMY Sparta, WI | 1326 nm out, 8 nm south of the line, tower | no report just now | 839 ft | ||||
| BTL Battle Creek, MI | 1595 nm out, 9 nm southwest of the line, tower | no report just now | 951 ft | ||||
| JXN Jackson, MI | 1625 nm out, 4 nm north of the line, tower | no report just now | 1,000 ft | ||||
| HGR Hagerstown, MD | 1963 nm out, 4 nm northeast of the line, tower | no report just now | 703 ft | ||||
| BWI Baltimore, MD | destination | no report just now | 143 ft |
The highest airport on this list sits at 3,680 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At BWI when you get there the forecast at the estimated arrival, 8:16 pm EDT (00:16 UTC)
BWI has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
- 6/8923 Kalispell, MT, Wednesday, October 14, 2026 through Wednesday, October 14, 2026 Local 15 nm from the route, 319 nm along the route · a VIP movement · starts Wednesday 14 October · ZLC
- 6/8927 Kalispell, MT, Wednesday, October 14, 2026 through Wednesday, October 14, 2026 Local 5 nm from the route, 339 nm along the route · a VIP movement · starts Wednesday 14 October · ZSE
- 6/8587 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local on the route, 1784 nm along the route · a VIP movement · today · ZOB
- 6/8888 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local 22 nm from the route, 1804 nm along the route · security · today · ZOB
- 6/8829 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local 6 nm from the route, 1804 nm along the route · a VIP movement · today · ZOB
- 6/8600 Sterling, VA, Monday, October 12, 2026 through Monday, October 12, 2026 Local 16 nm from the route, at the destination end · a VIP movement · today · ZDC
- 4/9383 WASHINGTON, DC., USA 12 nm from the route, at the destination end · security · ZDC
- 6/8800 Baltimore, MD, Saturday, October 17, 2026 through Sunday, October 18, 2026 UTC 6 nm from the route, at the destination end · drones kept away from a public gathering · starts Saturday 17 October · ZDC
Daylight
Sunset at BFI 6:25 pm PDT (01:25 UTC), at BWI 6:32 pm EDT (22:32 UTC) (civil twilight ends 6:59 pm EDT (22:59 UTC)). At 120 knots the arrival at BWI is after sunset there (6:32 pm EDT (22:32 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, Baltimore/Washington International Thurgood Marshall.