Plan a flight · Sun 11:41 pm PDT (06:41 UTC)

Seattle-Tacoma International to Philadelphia International SEA → PHL

2,061 nautical miles (2,372 statute miles) east on a straight line, true course 085°, about 069° magnetic at the departure end (variation 16E). At 120 knots that is 12 h 29 min at the quickest height in today's winds (39,000 ft, a 45-knot tailwind), arriving about 3:10 pm EDT (19:10 UTC). Right now SEA is VFR, wind from the east-southeast (110°) at 6 knots; PHL is IFR, wind from the north (010°) at 10 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: 2,725 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 E22E: thunderstorms (a convective SIGMET) up to 40,000 ft, moving from the southwest at 20 knots, until 12:55 am PDT (07:55 UTC). Over the last 30 nm of the route.

as issued

WSUS31 KKCI 120555
MKCE WST 120555
CONVECTIVE SIGMET 22E
VALID UNTIL 0755Z
NY NJ PA DE MD VA DC WV AND MA RI DE NJ NY CSTL WTRS
FROM 40E HTO-80SSW ACK-100ESE SIE-30SW CSN-40SSE JST-40E HTO
AREA EMBD TS MOV FROM 24020KT. TOPS TO FL400.

AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the first 189 nm of the route.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 129 to 667 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 249 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 269 to 1095 nm out.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 279 to 468 nm out.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 677 to 677 nm out.
AIRMET TANGO 3W: 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 1285 to 1404 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 508 nm of the route.
AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1842 to 1982 nm out.
AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the last 159 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

A333 descending, 35 nm southwest, 10:44 pm PDT (05:44 UTC): a routine report with nothing remarked on. 1673 nm along the route, 35 nm southwest of the line.
as filed, and in English
```
DTW UA /OV DTW/TM 0544/FLDURD/TP A333/SK TOPS 025
```
Report
a routine report filed through DTW
Where
over DTW
Time
05:44 UTC
Height
during the descent
Aircraft
A333
Sky
tops 2,500 ft
B739 descending, 35 nm southwest, 9:54 pm PDT (04:54 UTC): a routine report with nothing remarked on. 1673 nm along the route, 35 nm southwest of the line.
as filed, and in English
```
DTW UA /OV DTW/TM 0454/FLDURD/TP B739/SK BASES 011
```
Report
a routine report filed through DTW
Where
over DTW
Time
04:54 UTC
Height
during the descent
Aircraft
B739
Sky
bases 1,100 ft

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 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 19 forecast points nearest it (SEA, YKM, GEG, GPI, GTF, GGW, MLS, DIK, ABR, AXN, MSP, LSE, GRB, MKG, CLE, AGC, PSB, AVP, ACY). 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	250° at 9 kt	−7 kt		127 kt	16 h 14 min	6:55 pm EDT (22:55 UTC)
5,500 ft	light and variable	0	3 °C	120 kt	17 h 10 min	7:51 pm EDT (23:51 UTC)
7,500 ft	240° at 3 kt	−2 kt	7 °C	122 kt	16 h 54 min	7:35 pm EDT (23:35 UTC)
9,500 ft	240° at 5 kt	−4 kt	3 °C	124 kt	16 h 37 min	7:18 pm EDT (23:18 UTC)
11,500 ft	240° at 9 kt	−6 kt	0 °C	126 kt	16 h 21 min	7:02 pm EDT (23:02 UTC)
13,500 ft	240° at 12 kt	−10 kt	-3 °C	130 kt	15 h 51 min	6:32 pm EDT (22:32 UTC)
15,500 ft	250° at 15 kt	−13 kt	-7 °C	133 kt	15 h 30 min	6:11 pm EDT (22:11 UTC)
17,500 ft	260° at 18 kt	−17 kt	-11 °C	137 kt	15 h 03 min	5:44 pm EDT (21:44 UTC)
18,000 ft FL180	260° at 19 kt	−18 kt	-12 °C	138 kt	14 h 56 min	5:37 pm EDT (21:37 UTC)
24,000 ft FL240	250° at 22 kt	−20 kt	-23 °C	140 kt	14 h 43 min	5:24 pm EDT (21:24 UTC)
30,000 ft FL300	260° at 25 kt	−25 kt	-37 °C	145 kt	14 h 13 min	4:54 pm EDT (20:54 UTC)
34,000 ft FL340	260° at 35 kt	−34 kt	-42 °C	154 kt	13 h 23 min	4:04 pm EDT (20:04 UTC)
39,000 ft FL390	260° at 46 kt	−45 kt	-48 °C	165 kt	12 h 29 min	3:10 pm EDT (19:10 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
SEA	used from 0 nm out; 25 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°
YKM	used from 50 nm out; 58 nm from the line	070/10	040/15 -1°	020/27 -8°	030/25 -13°	020/48 -20°	010/83 -27°	010/77 -37°	010/49 -40°	350/14 -41°
GEG	used from 100 nm out; 69 nm from the line		080/16 -2°	050/17 -7°	080/9 -10°	190/33 -21°	180/31 -32°	L/V -35°	L/V -37°	270/8 -40°
GPI	used from 249 nm out; 66 nm from the line		070/19 -5°	100/16 -7°	080/10 -8°	130/8 -19°	170/37 -28°	200/50 -40°	210/43 -40°	220/41 -42°
GTF	used from 398 nm out; 21 nm from the line		070/11	080/15 -7°	110/19 -9°	190/25 -14°	200/34 -23°	200/54 -39°	220/66 -40°	220/77 -44°
GGW	used from 548 nm out; 80 nm from the line		110/23 0°	130/20 -2°	170/24 -3°	230/44 -11°	220/51 -21°	210/52 -39°	220/64 -44°	240/85 -48°
MLS	used from 647 nm out; 48 nm from the line		150/23 2°	190/29 4°	210/44 2°	220/32 -10°	210/36 -21°	200/48 -37°	230/63 -40°	240/71 -47°
DIK	used from 747 nm out; 25 nm from the line		150/24 7°	200/38 6°	220/53 0°	230/51 -9°	230/49 -21°	240/37 -37°	240/47 -44°	250/65 -48°
ABR	used from 896 nm out; 86 nm from the line	070/14	250/10 17°	270/16 11°	260/28 5°	260/36 -10°	260/41 -22°	270/33 -37°	260/42 -42°	260/50 -48°
AXN	used from 1046 nm out; 37 nm from the line	100/14	250/21 14°	240/24 12°	240/31 5°	260/36 -10°	260/40 -21°	250/42 -36°	260/48 -45°	260/53 -50°
MSP	used from 1145 nm out; 51 nm from the line	230/26	240/30 17°	240/24 12°	250/22 5°	250/35 -10°	260/36 -21°	250/41 -36°	250/49 -45°	260/58 -52°
LSE	used from 1295 nm out; 63 nm from the line	230/40	240/24 17°	240/13 10°	250/13 6°	280/22 -9°	250/28 -21°	250/41 -34°	260/42 -44°	270/62 -53°
GRB	used from 1344 nm out; 59 nm from the line	250/36	270/23 16°	270/14 9°	240/18 4°	280/26 -9°	280/29 -20°	290/42 -36°	290/51 -45°	290/72 -55°
MKG	used from 1494 nm out; 32 nm from the line	260/22	290/16 15°	300/11 10°	290/5 3°	300/26 -9°	300/32 -20°	320/48 -36°	320/61 -45°	310/74 -53°
CLE	used from 1643 nm out; 97 nm from the line	340/7	010/16 13°	350/18 8°	350/20 3°	340/31 -10°	340/46 -21°	340/54 -37°	330/62 -44°	340/65 -49°
AGC	used from 1793 nm out; 82 nm from the line	350/14	330/20 11°	340/18 8°	330/17 3°	340/22 -11°	340/31 -22°	330/33 -36°	300/34 -41°	300/35 -47°
PSB	used from 1842 nm out; 51 nm from the line		360/13 13°	330/14 7°	300/11 3°	290/12 -11°	240/23 -23°	270/25 -36°	250/34 -40°	250/45 -48°
AVP	used from 1992 nm out; 69 nm from the line	150/5	350/13 12°	270/20 8°	260/17 4°	260/25 -11°	240/31 -22°	240/54 -35°	230/61 -41°	240/55 -49°
ACY	used from 2042 nm out; 49 nm from the line	220/19	220/18 14°	210/36 9°	210/35 5°	220/36 -8°	240/49 -21°	220/90 -31°	230/103 -40°	230/81 -50°

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	from the east-southeast (110°) at 6 knots	10+ mi	none	432 ft	10:53 pm PDT (05:53 UTC)
GEG Spokane, WA	189 nm out, 5 nm east of the line, tower	VFR Sky: a few clouds at 8,000 feet, scattered clouds at 12,000 feet	from the northeast (040°) at 10 knots	10+ mi	none	2,385 ft	05:53 UTC
THM Thompson Falls, MT	289 nm out, 6 nm southwest of the line	no report just now				2,467 ft
GTF Great Falls, MT	448 nm out, 7 nm southwest of the line, tower	marginal VFR Sky: a few clouds at 600 feet, overcast at 1,000 feet Weather: light snow, mist	from the north (350°) at 10 knots	3 mi	1,000 ft	3,680 ft	06:01 UTC
GDV Glendive, MT	707 nm out, 4 nm east of the line	low IFR Sky: overcast at 400 feet Weather: heavy rain, mist	from the northeast (050°) at 13 knots	6 mi	400 ft	2,458 ft	05:56 UTC
BIS Bismarck, ND	876 nm out, 7 nm northeast of the line, tower	IFR Sky: overcast at 700 feet Weather: light rain	variable at 5 knots	10+ mi	700 ft	1,661 ft	05:52 UTC
STC St Cloud, MN	1165 nm out, 2 nm southeast of the line, tower	VFR	from the north (360°) at 4 knots	10+ mi	none	1,030 ft	05:53 UTC
ATW Appleton, WI	1414 nm out, 3 nm south of the line, tower	VFR	from the south (190°) at 7 knots	10+ mi	none	918 ft	06:35 UTC
FNT Flint, MI	1633 nm out, 3 nm east of the line, tower	VFR Sky: a few clouds at 700 feet	from the southwest (220°) at 4 knots	10+ mi	none	782 ft	05:53 UTC
PTK Pontiac, MI	1653 nm out, 11 nm south of the line, tower	IFR Sky: overcast at 700 feet	from the west-southwest (240°) at 6 knots	10+ mi	700 ft	980 ft	05:53 UTC
UNV State College, PA	1932 nm out, 5 nm west of the line, tower	IFR Sky: overcast at 700 feet Weather: mist	from the north-northwest (330°) at 2 knots	2.5 mi	700 ft	1,231 ft	06:35 UTC
PHL Philadelphia, PA	destination	IFR Sky: a broken layer at 600 feet, overcast at 1,100 feet Weather: rain, mist	from the north (010°) at 10 knots	3 mi	600 ft	35 ft	2:20 am EDT (06:20 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 PHL when you get there the forecast at the estimated arrival, 3:10 pm EDT (19:10 UTC)

Wind from the north-northwest at 10 knots, gusting to 15, visibility more than 6 miles, scattered clouds at 5,000 feet VFR

The whole forecast for PHL

From Mon 2:00 am EDT (06:00 UTC): wind from the north-northeast at 8 knots, visibility 5 miles, light rain showers, mist, thunderstorms nearby, overcast at 700 feet (thunderheads)
From Mon 7:00 am EDT (11:00 UTC): wind from the north at 10 knots, visibility 5 miles, mist, overcast at 800 feet
From Mon 10:00 am EDT (14:00 UTC): wind from the north at 10 knots, gusting to 15, visibility 6 miles, mist, a broken layer at 2,500 feet
From Mon 12:00 pm EDT (16:00 UTC): wind from the north-northwest at 10 knots, gusting to 15, visibility more than 6 miles, scattered clouds at 5,000 feet
From Mon 6:00 pm EDT (22:00 UTC): wind from the northwest at 8 knots, visibility more than 6 miles, scattered clouds at 25,000 feet
From Mon 9:00 pm EDT (01:00 UTC): wind light and variable, visibility more than 6 miles, a few clouds at 25,000 feet

The forecast for SEA, the departure

From Sun 11:00 pm PDT (06:00 UTC): wind from the east-northeast at 6 knots, visibility more than 6 miles, clear skies
From Mon 3:00 am PDT (10:00 UTC): wind from the southeast at 4 knots, visibility more than 6 miles, patches of fog, 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

6/6656 ANOKA, MN, Monday, October 5, 2026 through Monday, October 19, 2026 Local 13 nm from the route, 1205 nm along the route · security · until 19 October · ZMP
6/8829 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local 11 nm from the route, 1803 nm along the route · a VIP movement · today · ZOB
6/8587 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local 11 nm from the route, 1803 nm along the route · a VIP movement · today · ZOB

Daylight

Sunset at SEA 6:27 pm PDT (01:27 UTC), at PHL 6:26 pm EDT (22:26 UTC) (civil twilight ends 6:53 pm EDT (22:53 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, Philadelphia International.