Plan a flight · Sun 9:04 pm EDT (01:04 UTC)

Louisville Muhammad Ali International to Seattle-Tacoma International SDF → SEA

1,686 nautical miles (1,941 statute miles) northwest on a straight line, true course 301°, about 306° magnetic at the departure end (variation 5W). At 120 knots that is 13 h 42 min at the quickest height in today's winds (4,500 ft, a 3-knot tailwind), arriving about 7:46 am PDT (14:46 UTC). Right now SDF is VFR, wind from the southwest (220°) at 4 knots; SEA is VFR, wind from the north (350°) at 11 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 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 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 778 to 1407 nm out.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 868 to 1427 nm out.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 1068 to 1138 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1068 to 1497 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). Near the route, 1108 nm along the route.
AIRMET ZULU 2C: moderate icing up to 14,000 ft. Over the route from 1347 to 1567 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 SDF.

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

E75L at 14,000 ft, 5 nm southeast, 7:22 pm EDT (23:22 UTC): moderate turbulence from 14,000 ft to 21,000 ft, remarks: during the climb zlc. 1347 nm along the route, 5 nm southeast of the line.
as filed, and in English
```
MSO UA /OV 32S/TM 2322/FL140/TP E75L/TB MOD 140-210/RM DURC /ZLC
```
Report
a routine report filed through MSO
Where
over 32S
Time
23:22 UTC
Height
at 14,000 ft
Aircraft
E75L
Turbulence
moderate from 14,000 ft to 21,000 ft
Remarks
during the climb zlc
E170 climbing, 0 nm north, 6:26 pm EDT (22:26 UTC): a routine report with nothing remarked on. At the departure end, 0 nm north of the line.
as filed, and in English
```
SDF UA /OV SDF/TM 2226/FLDURC/TP E170/SK B022 T036
```
Report
a routine report filed through SDF
Where
over SDF
Time
22:26 UTC
Height
during the climb
Aircraft
E170
Sky
B022 T036
M600 at 1,800 ft, 5 nm northeast, 6:12 pm EDT (22:12 UTC): overcast above 1,800 ft. At the departure end, 5 nm northeast of the line.
as filed, and in English
```
LOU UA /OV DURD/TM 2212/FL018/TP M600/SK OVC018-TOPO37
```
Report
a routine report filed through LOU
Where
over DURD
Time
22:12 UTC
Height
at 1,800 ft
Aircraft
M600
Sky
OVC018-TOPO37
B38M at 23,700 ft, 4 nm north, 7:51 pm EDT (23:51 UTC): light turbulence. 90 nm along the route, 4 nm north of the line.
as filed, and in English
```
IND UA /OV TTH190030/TM 2351/FL237/TP B38M/TB LGT
```
Report
a routine report filed through IND
Where
30 nm south (190°) of TTH
Time
23:51 UTC
Height
at 23,700 ft
Aircraft
B38M
Turbulence
light
PC12 at 100 ft, 43 nm north, 6:34 pm EDT (22:34 UTC): no icing. 748 nm along the route, 43 nm north of the line.
as filed, and in English
```
PIR UA /OV PIR/TM 2234/FL001/TP PC12/SK BASE030-TOP045/IC NEG
```
Report
a routine report filed through PIR
Where
over PIR
Time
22:34 UTC
Height
at 100 ft
Aircraft
PC12
Sky
BASE030-TOP045
Icing
none
A21N at 35,000 ft, 38 nm south, 6:47 pm EDT (22:47 UTC): no turbulence, remarks: ZDVWC-32. 968 nm along the route, 38 nm south of the line.
as filed, and in English
```
GCC UA /OV GCC/TM 2247/FL350/TP A21N/TB NEG /RM ZDVWC-32
```
Report
a routine report filed through GCC
Where
over GCC
Time
22:47 UTC
Height
at 35,000 ft
Aircraft
A21N
Turbulence
none
Remarks
ZDVWC-32
A306 at 4,700 ft, 9 nm northeast, 8:51 pm EDT (00:51 UTC): a routine report with nothing remarked on. 1118 nm along the route, 9 nm northeast of the line.
as filed, and in English
```
BIL UA /OV BIL280001/TM 0051/FL047/TP A306/SK BASE 047
```
Report
a routine report filed through BIL
Where
1 nm west (280°) of BIL
Time
00:51 UTC
Height
at 4,700 ft
Aircraft
A306
Sky
base 4,700 ft
B737 descending, 20 nm south, 8:28 pm EDT (00:28 UTC): scattered clouds above 8,000 ft, fog, snow, remarks: broke out about 100FT above mins. 1217 nm along the route, 20 nm south of the line.
as filed, and in English
```
BZN UA /OV BZN/TM 0028/FLDURD/TP B737/SK SCT080/WX 1/2SM SN FG/RM BROKE OUT ABOUT 100FT ABOVE MINS
```
Report
a routine report filed through BZN
Where
over BZN
Time
00:28 UTC
Height
during the descent
Aircraft
B737
Sky
scattered clouds from 8,000 ft
Weather
1/2SM, snow, fog
Remarks
broke out about 100FT above mins
B738 at 24,000 ft, 18 nm south, 7:13 pm EDT (23:13 UTC): remarks: snow top flight level at 24,000 ft zlc. 1247 nm along the route, 18 nm south of the line.
as filed, and in English
```
BZN UA /OV BZN270030/TM 2313/FL240/TP B738/RM SN TOP FL 240 /ZLC
```
Report
a routine report filed through BZN
Where
30 nm west (270°) of BZN
Time
23:13 UTC
Height
at 24,000 ft
Aircraft
B738
Remarks
snow top flight level at 24,000 ft zlc
C25B at 4,100 ft, 19 nm north, 8:36 pm EDT (00:36 UTC): no icing, overcast above 4,100 ft, remarks: during the descent ils runway 12. 1347 nm along the route, 19 nm north of the line.
as filed, and in English
```
MSO UA /OV MSO/TM 0036/FL041/TP C25B/SK OVC041/IC NEG/RM DURD ILS RY 12
```
Report
a routine report filed through MSO
Where
over MSO
Time
00:36 UTC
Height
at 4,100 ft
Aircraft
C25B
Sky
overcast from 4,100 ft
Icing
none
Remarks
during the descent ils runway 12
C172 at 5,500 ft, 24 nm south, 6:17 pm EDT (22:17 UTC): a trace of rime icing, 0 °C, remarks: zse. 1507 nm along the route, 24 nm south of the line.
as filed, and in English
```
PUW UA /OV PUW250030/TM 2217/FL055/TP C172/TA 00/IC TRACE RIME/RM -ZSE
```
Report
a routine report filed through PUW
Where
30 nm west (250°) of PUW
Time
22:17 UTC
Height
at 5,500 ft
Aircraft
C172
Temperature
0 °C
Icing
trace rime
Remarks
zse
PC12 at 15,000 ft, 32 nm south, 8:42 pm EDT (00:42 UTC): remarks: zse. At the destination end, 32 nm south of the line.
as filed, and in English
```
YKM UA /OV YKM270050/TM 0042/FL150/TP PC12/SK TOP130/RM -ZSE
```
Report
a routine report filed through YKM
Where
50 nm west (270°) of YKM
Time
00:42 UTC
Height
at 15,000 ft
Aircraft
PC12
Sky
TOP130
Remarks
zse
PC12 at 13,000 ft, 32 nm south, 8:42 pm EDT (00:42 UTC): remarks: zse. At the destination end, 32 nm south of the line.
as filed, and in English
```
YKM UA /OV YKM270050/TM 0042/FL130/TP PC12/SK TOP130/RM -ZSE
```
Report
a routine report filed through YKM
Where
50 nm west (270°) of YKM
Time
00:42 UTC
Height
at 13,000 ft
Aircraft
PC12
Sky
TOP130
Remarks
zse

Winds aloft along the route, and the time en route the forecast for use 20:00–03:00 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 17 forecast points nearest it (LOU, EVV, SPI, BRL, DSM, OMA, FSD, ONL, PIR, RAP, MLS, BIL, DLN, LWS, GEG, 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	160° at 3 kt	−3 kt	11 °C	123 kt	13 h 42 min	7:46 am PDT (14:46 UTC)
6,500 ft	240° at 1 kt	0	10 °C	120 kt	14 h 03 min	8:07 am PDT (15:07 UTC)
8,500 ft	250° at 4 kt	+2 kt	6 °C	118 kt	14 h 17 min	8:21 am PDT (15:21 UTC)
10,500 ft	240° at 8 kt	+4 kt	3 °C	116 kt	14 h 32 min	8:36 am PDT (15:36 UTC)
12,500 ft	240° at 11 kt	+7 kt	-1 °C	113 kt	14 h 55 min	8:59 am PDT (15:59 UTC)
14,500 ft	240° at 13 kt	+9 kt	-5 °C	111 kt	15 h 11 min	9:15 am PDT (16:15 UTC)
16,500 ft	240° at 15 kt	+10 kt	-9 °C	110 kt	15 h 20 min	9:24 am PDT (16:24 UTC)
18,000 ft FL180	240° at 17 kt	+12 kt	-12 °C	108 kt	15 h 37 min	9:41 am PDT (16:41 UTC)
24,000 ft FL240	250° at 23 kt	+18 kt	-22 °C	102 kt	16 h 32 min	10:36 am PDT (17:36 UTC)
30,000 ft FL300	250° at 28 kt	+22 kt	-35 °C	98 kt	17 h 12 min	11:16 am PDT (18:16 UTC)
34,000 ft FL340	250° at 38 kt	+32 kt	-41 °C	88 kt	19 h 10 min	1:14 pm PDT (20:14 UTC)
39,000 ft FL390	260° at 45 kt	+42 kt	-48 °C	78 kt	21 h 37 min	3:41 pm PDT (22:41 UTC)

Based on data from the 11th at 18:00 UTC; valid on the 12th at 00:00 UTC for use 20:00 to 03:00 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
LOU	used from 0 nm out; 27 nm from the line	320/15	340/24 14°	330/28 9°	340/34 4°	340/37 -9°	340/42 -20°	320/39 -35°	320/45 -39°	330/40 -47°
EVV	used from 50 nm out; 50 nm from the line	310/13	340/26 16°	330/29 10°	330/32 4°	330/30 -9°	340/38 -20°	330/60 -35°	320/57 -41°	330/39 -48°
SPI	used from 150 nm out; 35 nm from the line	210/13	260/11 17°	270/18 10°	290/21 4°	310/20 -8°	330/25 -19°	320/49 -34°	320/60 -44°	320/59 -50°
BRL	used from 249 nm out; 24 nm from the line	200/20	250/21 16°	240/22 10°	260/20 5°	270/16 -7°	290/22 -18°	320/41 -34°	320/56 -43°	310/68 -53°
DSM	used from 349 nm out; 43 nm from the line	200/32	240/27 17°	260/19 10°	260/16 5°	260/19 -7°	240/22 -19°	270/20 -32°	270/38 -42°	290/58 -53°
OMA	used from 499 nm out; 58 nm from the line	190/34	230/34 19°	250/25 12°	250/18 6°	250/22 -7°	250/28 -19°	260/34 -32°	260/39 -41°	280/56 -51°
FSD	used from 549 nm out; 59 nm from the line	200/16	220/20 17°	240/26 13°	230/19 6°	240/25 -9°	240/28 -20°	250/39 -33°	250/44 -43°	260/63 -52°
ONL	used from 599 nm out; 45 nm from the line		200/20 17°	230/26 14°	240/21 7°	250/27 -9°	260/32 -19°	240/44 -34°	240/56 -41°	250/62 -51°
PIR	used from 698 nm out; 50 nm from the line		L/V 17°	230/13 12°	220/22 6°	250/31 -9°	250/34 -21°	240/50 -35°	230/61 -43°	240/62 -51°
RAP	used from 798 nm out; 39 nm from the line		120/15 12°	180/22 11°	220/26 5°	230/35 -9°	240/40 -22°	240/50 -37°	240/51 -41°	240/47 -47°
MLS	used from 948 nm out; 88 nm from the line		120/22 5°	170/18 4°	200/33 1°	230/49 -10°	230/58 -21°	220/54 -37°	230/64 -44°	250/74 -49°
BIL	used from 1048 nm out; 40 nm from the line		080/24	130/14 -1°	180/33 0°	210/43 -10°	220/58 -21°	200/55 -36°	220/75 -44°	240/83 -48°
DLN	used from 1197 nm out; 78 nm from the line			080/10 -3°	180/8 -3°	180/23 -14°	200/58 -22°	200/80 -36°	220/85 -41°	230/81 -45°
LWS	used from 1347 nm out; 97 nm from the line	010/5	050/14 -2°	040/12 -6°	160/7 -10°	190/30 -22°	200/54 -27°	200/48 -35°	210/40 -37°	230/32 -41°
GEG	used from 1497 nm out; 44 nm from the line		050/18 -2°	060/19 -8°	L/V -11°	160/11 -24°	190/17 -31°	200/19 -35°	220/14 -37°	250/11 -41°
YKM	used from 1547 nm out; 58 nm from the line	030/16	020/18 0°	030/30 -8°	030/23 -13°	020/40 -23°	010/73 -29°	010/54 -36°	360/29 -37°	330/16 -40°
SEA	used from 1646 nm out; 20 nm from the line	360/9	350/10 1°	010/10 -5°	030/20 -11°	020/60 -17°	010/86 -26°	360/90 -40°	010/68 -42°	360/31 -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
SDF Louisville, KY	departure	VFR Sky: a few clouds at 3,300 feet	from the southwest (220°) at 4 knots	10+ mi	none	500 ft	8:56 pm EDT (00:56 UTC)
RSV Robinson, IL	100 nm out, 4 nm west of the line	VFR	from the southwest (230°) at 3 knots	10+ mi	none	461 ft	00:55 UTC
SPI Springfield, IL	210 nm out, 5 nm southwest of the line, tower	VFR	from the south-southeast (160°) at 6 knots	10+ mi	none	597 ft	00:52 UTC
DSM Des Moines, IA	419 nm out, 3 nm east of the line, tower	VFR Sky: a broken layer at 20,000 feet	from the south (170°) at 10 knots	10+ mi	20,000 ft	957 ft	00:54 UTC
SUX Sioux City, IA	549 nm out, 3 nm southwest of the line, tower	VFR	from the south-southeast (160°) at 4 knots	10+ mi	none	1,098 ft	00:52 UTC
PHP Philip, SD	798 nm out, 2 nm northeast of the line	marginal VFR Sky: overcast at 1,100 feet	from the east-northeast (060°) at 5 knots	10+ mi	1,100 ft	2,209 ft	00:55 UTC
RAP Rapid City, SD	858 nm out, 20 nm south of the line, tower	IFR Sky: a broken layer at 900 feet, overcast at 2,000 feet	from the northeast (050°) at 8 knots	10+ mi	900 ft	3,203 ft	00:52 UTC
BIL Billings, MT	1108 nm out, 10 nm north of the line, tower	IFR Sky: a broken layer at 800 feet, overcast at 1,200 feet Weather: light rain	from the north (010°) at 15 knots	10+ mi	800 ft	3,662 ft	00:53 UTC
BZN Bozeman, MT	1217 nm out, 20 nm south of the line, tower	low IFR Sky: a broken layer at 200 feet, overcast at 1,100 feet Weather: light snow, mist	calm	0.75 mi	200 ft	4,473 ft	00:56 UTC
PUW Pullman/Moscow, WA	1467 nm out, 14 nm southwest of the line	VFR Sky: overcast at 5,500 feet	from the north (010°) at 8 knots	10+ mi	5,500 ft	2,566 ft	00:53 UTC
MWH Moses Lake, WA	1567 nm out, 3 nm east of the line, tower	VFR Sky: overcast at 10,000 feet	from the northeast (050°) at 13 knots, gusting to 18	10+ mi	10,000 ft	1,188 ft	00:52 UTC
SEA Seattle, WA	destination	VFR Sky: a few clouds at 5,000 feet	from the north (350°) at 11 knots	10+ mi	none	432 ft	5:53 pm PDT (00:53 UTC)

The highest airport on this list sits at 4,473 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At SEA when you get there the forecast at the estimated arrival, 7:46 am PDT (14:46 UTC)

Wind from the southeast at 4 knots, visibility more than 6 miles, patches of fog, clear skies VFR

The whole forecast for SEA

From Sun 5:00 pm PDT (00:00 UTC): wind from the north at 12 knots, gusting to 20, visibility more than 6 miles, a few clouds at 2,000 feet, a few clouds at 5,000 feet
From Sun 8:00 pm PDT (03:00 UTC): wind from the 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 northwest at 5 knots, visibility more than 6 miles, scattered clouds at 25,000 feet

The forecast for SDF, the departure

From Sun 8:00 pm EDT (00:00 UTC): wind from the west-northwest at 5 knots, visibility more than 6 miles, a broken layer at 2,500 feet
From Sun 8:30 pm EDT (00:30 UTC): wind from the southwest at 3 knots, visibility more than 6 miles, clear skies
From Mon 6:00 am EDT (10:00 UTC): wind from the south-southeast at 3 knots, visibility 4 miles, mist, clear skies
From Mon 9:00 am EDT (13:00 UTC): wind from the south-southwest at 6 knots, visibility more than 6 miles, clear skies

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

No temporary flight restriction on or near this route right now.

Daylight

Sunset at SDF 7:09 pm EDT (23:09 UTC), at SEA 6:27 pm PDT (01:27 UTC) (civil twilight ends 6:58 pm PDT (01:58 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 central Great Lakes · loop National Weather Service

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

Radar now, the northern Rockies · 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: Louisville Muhammad Ali International, Seattle-Tacoma International.