Plan a flight · Mon 2:43 am PDT (09:43 UTC)

Seattle-Tacoma International to Baltimore/Washington International Thurgood Marshall SEA → BWI

2,024 nautical miles (2,329 statute miles) east on a straight line, true course 087°, about 071° magnetic at the departure end (variation 16E). 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 6:03 pm EDT (22:03 UTC). Right now SEA is VFR, wind calm; BWI is marginal VFR, wind from the north-northwest (340°) at 6 knots. 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: 1,441 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 C15C: thunderstorms (a convective SIGMET) up to 35,000 ft, moving from the southwest at 40 knots, until 3:55 am PDT (10:55 UTC). Near the route, 837 nm along the route.
as issued
```
WSUS32 KKCI 120855
MKCC WST 120855
CONVECTIVE SIGMET 15C
VALID UNTIL 1055Z
SD ND
FROM 50SE DIK-50ENE DPR-40ENE RAP-50NNW RAP-50SE DIK
AREA TS MOV FROM 22040KT. TOPS TO FL350.
```

SIGMET E31E: thunderstorms (a convective SIGMET) up to 30,000 ft, until 3:55 am PDT (10:55 UTC). Near the route, at the destination end.

as issued

WSUS31 KKCI 120855
MKCE WST 120855
CONVECTIVE SIGMET 31E
VALID UNTIL 1055Z
MD VA DC
FROM 20NNE DCA-30WSW SBY-RIC-CSN-20NNE DCA
AREA TS MOV LTL. TOPS TO FL300.

AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the first 389 nm of the route.
AIRMET ZULU 2C: moderate icing up to 18,000 ft. Over the route from 179 to 688 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 259 to 1127 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 259 to 548 nm out.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 698 to 748 nm out.
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 1246 to 1416 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, fog). Over the last 449 nm of the route.
AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, mist). Over the route from 1844 to 1974 nm out.
AIRMET TANGO 3W: moderate turbulence below 18,000 ft (due to mountain wave) up to 6,000 ft. Over the route from 1914 to 2004 nm out.
AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 24,000 ft to 33,000 ft. Over the last 10 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 SEA.

Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first

BE20 at 15,000 ft, 25 nm north, 1:00 am PDT (08:00 UTC): light icing, 0 °C. 798 nm along the route, 25 nm north of the line.
as filed, and in English
```
DIK UA /OV DIK/TM 0800/FL150/TP BE20/TA 00/IC LGT CLR
```
Report
a routine report filed through DIK
Where
over DIK
Time
08:00 UTC
Height
at 15,000 ft
Aircraft
BE20
Temperature
0 °C
Icing
light clear
B77W at 30,000 ft, 18 nm southwest, 1:00 am PDT (08:00 UTC): light to moderate chop turbulence. 997 nm along the route, 18 nm southwest of the line.
as filed, and in English
```
ABR UA /OV ABR/TM 0800/FL300/TP B77W/TB LGT-MOD CHOP
```
Report
a routine report filed through ABR
Where
over ABR
Time
08:00 UTC
Height
at 30,000 ft
Aircraft
B77W
Turbulence
light to moderate chop
GL7T at 1,500 ft, 10 nm south, 2:02 am PDT (09:02 UTC): a routine report with nothing remarked on. 1854 nm along the route, 10 nm south of the line.
as filed, and in English
```
AGC UA /OV KAGC/TM 0902/FL015/TP GL7T/SK B015
```
Report
a routine report filed through AGC
Where
over KAGC
Time
09:02 UTC
Height
at 1,500 ft
Aircraft
GL7T
Sky
B015
B737 at 700 ft, 0 nm south, 2:33 am PDT (09:33 UTC): remarks: light rain. At the destination end, 0 nm south of the line.
as filed, and in English
```
BWI UA /OV BWI/TM 0933/FL007/TP B737/RM LIGHT RAIN
```
Report
a routine report filed through BWI
Where
over BWI
Time
09:33 UTC
Height
at 700 ft
Aircraft
B737
Remarks
light rain
B737 at 800 ft, 0 nm south, 12:30 am PDT (07:30 UTC): remarks: bases 800 ft. At the destination end, 0 nm south of the line.
as filed, and in English
```
BWI UA /OV BWI/TM 0730/FL008/TP B737/RM BASES 008
```
Report
a routine report filed through BWI
Where
over BWI
Time
07:30 UTC
Height
at 800 ft
Aircraft
B737
Remarks
bases 800 ft

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	9:24 pm EDT (01:24 UTC)
5,500 ft	280° at 6 kt	−6 kt	2 °C	126 kt	16 h 04 min	9:47 pm EDT (01:47 UTC)
7,500 ft	270° at 7 kt	−8 kt	8 °C	128 kt	15 h 49 min	9:32 pm EDT (01:32 UTC)
9,500 ft	270° at 10 kt	−9 kt	4 °C	129 kt	15 h 41 min	9:24 pm EDT (01:24 UTC)
11,500 ft	270° at 12 kt	−12 kt	1 °C	132 kt	15 h 20 min	9:03 pm EDT (01:03 UTC)
13,500 ft	270° at 14 kt	−14 kt	-3 °C	134 kt	15 h 06 min	8:49 pm EDT (00:49 UTC)
15,500 ft	270° at 15 kt	−15 kt	-7 °C	135 kt	15 h	8:43 pm EDT (00:43 UTC)
17,500 ft	270° at 16 kt	−17 kt	-11 °C	137 kt	14 h 46 min	8:29 pm EDT (00:29 UTC)
18,000 ft FL180	270° at 17 kt	−17 kt	-12 °C	137 kt	14 h 46 min	8:29 pm EDT (00:29 UTC)
24,000 ft FL240	270° at 21 kt	−21 kt	-24 °C	141 kt	14 h 21 min	8:04 pm EDT (00:04 UTC)
30,000 ft FL300	270° at 24 kt	−24 kt	-36 °C	144 kt	14 h 03 min	7:46 pm EDT (23:46 UTC)
34,000 ft FL340	270° at 34 kt	−35 kt	-41 °C	155 kt	13 h 03 min	6:46 pm EDT (22:46 UTC)
39,000 ft FL390	270° at 42 kt	−44 kt	-47 °C	164 kt	12 h 20 min	6:03 pm EDT (22:03 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; 25 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; 56 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; 72 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; 71 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; 76 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; 57 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; 31 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; 71 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; 54 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 1147 nm out; 43 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 1396 nm out; 65 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 1446 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; 79 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 1795 nm out; 39 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
SEA Seattle, WA	departure	VFR	calm	10+ mi	none	432 ft	1:53 am PDT (08:53 UTC)
GEG Spokane, WA	189 nm out, 8 nm northeast of the line, tower	VFR Sky: a few clouds at 5,500 feet, scattered clouds at 7,000 feet, a broken layer at 9,000 feet	from the northeast (040°) at 5 knots	10+ mi	9,000 ft	2,385 ft	08:53 UTC
THM Thompson Falls, MT	289 nm out, 7 nm northwest of the line	no report just now				2,467 ft
GTF Great Falls, MT	439 nm out, 12 nm northeast of the line, tower	IFR Sky: overcast at 800 feet Weather: light snow, mist	from the north-northwest (340°) at 7 knots	2.5 mi	800 ft	3,680 ft	09:26 UTC
BHK Baker, MT	738 nm out, 18 nm south of the line	marginal VFR Sky: scattered clouds at 400 feet, overcast at 1,300 feet Weather: light rain	from the east (080°) at 8 knots	7 mi	1,300 ft	2,980 ft	09:38 UTC
ASY Ashley, ND	947 nm out, 7 nm north of the line	no report just now				2,034 ft
FCM Minneapolis, MN	1206 nm out, 7 nm north of the line, tower	VFR	from the southwest (220°) at 4 knots	10+ mi	none	906 ft	08:53 UTC
CMY Sparta, WI	1326 nm out, 7 nm southeast of the line, tower	VFR Sky: a broken layer at 19,000 feet	calm	10+ mi	19,000 ft	839 ft	08:55 UTC
BTL Battle Creek, MI	1595 nm out, 8 nm southwest of the line, tower	VFR Sky: a few clouds at 400 feet Weather: mist	from the south-southwest (210°) at 6 knots	6 mi	none	951 ft	08:53 UTC
JXN Jackson, MI	1625 nm out, 5 nm north of the line, tower	VFR	from the south (180°) at 4 knots	10+ mi	none	1,000 ft	08:56 UTC
HGR Hagerstown, MD	1964 nm out, 4 nm northeast of the line, tower	marginal VFR Sky: overcast at 1,600 feet	from the northwest (310°) at 5 knots	10+ mi	1,600 ft	703 ft	08:53 UTC
BWI Baltimore, MD	destination	marginal VFR Sky: a few clouds at 800 feet, overcast at 1,100 feet Weather: light rain, mist	from the north-northwest (340°) at 6 knots	3 mi	1,100 ft	143 ft	5:31 am EDT (09:31 UTC)

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, 6:03 pm EDT (22:03 UTC)

Wind from the west-northwest at 9 knots, visibility more than 6 miles, scattered clouds at 2,500 feet, a broken layer at 3,500 feet VFR

The whole forecast for BWI

From Mon 5:00 am EDT (09:00 UTC): wind from the north-northwest at 9 knots, gusting to 16, visibility 2 miles, light rain, mist, scattered clouds at 700 feet, overcast at 1,100 feet
From Mon 10:00 am EDT (14:00 UTC): wind from the north-northwest at 12 knots, gusting to 20, visibility more than 6 miles, overcast at 1,400 feet
From Mon 1:00 pm EDT (17:00 UTC): wind from the northwest at 10 knots, gusting to 18, visibility more than 6 miles, scattered clouds at 1,500 feet, overcast at 2,500 feet
From Mon 4:00 pm EDT (20:00 UTC): wind from the west-northwest at 9 knots, visibility more than 6 miles, scattered clouds at 2,500 feet, a broken layer at 3,500 feet
From Mon 8:00 pm EDT (00:00 UTC): wind from the west at 5 knots, visibility more than 6 miles, scattered clouds at 4,000 feet

The forecast for SEA, the departure

From Mon 2:00 am PDT (09:00 UTC): wind light and variable, visibility more than 6 miles, clear skies
From Mon 9:00 am PDT (16:00 UTC): wind from the south-southeast at 4 knots, visibility more than 6 miles, clear skies
From Mon 11:00 am PDT (18:00 UTC): wind from the west at 6 knots, visibility more than 6 miles, clear skies
From Mon 8:00 pm PDT (03:00 UTC): wind from the south at 4 knots, visibility more than 6 miles, scattered clouds at 25,000 feet

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

6/8587 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local on the route, 1785 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, 1805 nm along the route · security · today · ZOB
6/8829 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local 7 nm from the route, 1805 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 SEA 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)).

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

Radar now, the Pacific Northwest · loop National Weather Service

Radar now, the northern Rockies · loop National Weather Service

Radar now, the upper Mississippi valley · loop National Weather Service

Radar, the whole country · loop National Weather Service

Surface analysis now Weather Prediction Center

Forecast chart, 12 hours ahead Weather Prediction Center

Forecast chart, 24 hours ahead Weather Prediction Center

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: Seattle-Tacoma International, Baltimore/Washington International Thurgood Marshall.