Plan a flight · Sun 6:46 pm PDT (01:46 UTC)

Spokane International to Louisville Muhammad Ali International GEG → SDF

1,496 nautical miles (1,722 statute miles) east on a straight line, true course 101°, about 087° magnetic at the departure end (variation 14E). At 120 knots that is 9 h 04 min at the quickest height in today's winds (39,000 ft, a 45-knot tailwind), arriving about 6:50 am EDT (10:50 UTC), after sunset at the destination. Right now GEG is VFR, wind from the northeast (040°) at 15 knots; SDF is VFR, wind from the southwest (220°) at 4 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: 1,089 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 3W: thunderstorms (a convective SIGMET) up to 31,000 ft, moving from the southwest at 40 knots, until 7:55 pm PDT (02:55 UTC). Over the route from 399 to 499 nm out.
as issued
```
WSUS33 KKCI 120055
MKCW WST 120055
CONVECTIVE SIGMET 3W
VALID UNTIL 0255Z
MT WY
FROM 10WSW MLS-70E DDY-20N LAR-50E BPI-30NE BIL-10WSW MLS
AREA TS MOV FROM 22040KT. TOPS TO FL310.
```
AIRMET ZULU 2C: moderate icing up to 16,000 ft. Over the first 269 nm of the route.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 40 to 399 nm out.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 70 to 668 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 80 to 768 nm out.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Near the route, 389 nm along the route.
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 967 to 1117 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 GEG.

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

E75L at 14,000 ft, 35 nm south, 4:22 pm PDT (23:22 UTC): moderate turbulence from 14,000 ft to 21,000 ft, remarks: during the climb zlc. 150 nm along the route, 35 nm south 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
C25B at 4,100 ft, 13 nm southwest, 5:36 pm PDT (00:36 UTC): no icing, overcast above 4,100 ft, remarks: during the descent ils runway 12. 150 nm along the route, 13 nm southwest 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
B738 at 24,000 ft, 47 nm south, 4:13 pm PDT (23:13 UTC): remarks: snow top flight level at 24,000 ft zlc. 249 nm along the route, 47 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
E75L descending, 49 nm south, 6:04 pm PDT (01:04 UTC): remarks: had the airport in sight at 400-500FT above ground. 279 nm along the route, 49 nm south of the line.
as filed, and in English
```
BZN UA /OV BZN/TM 0104/FLDURD/TP E75L/RM HAD THE AIRPORT IN SIGHT AT 400-500FT AGL
```
Report
a routine report filed through BZN
Where
over BZN
Time
01:04 UTC
Height
during the descent
Aircraft
E75L
Remarks
had the airport in sight at 400-500FT above ground
B737 descending, 49 nm south, 5:28 pm PDT (00:28 UTC): scattered clouds above 8,000 ft, fog, snow, remarks: broke out about 100FT above mins. 279 nm along the route, 49 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
A306 at 4,700 ft, 18 nm south, 5:51 pm PDT (00:51 UTC): a routine report with nothing remarked on. 379 nm along the route, 18 nm south 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
B763 at 32,000 ft, 25 nm south, 6:29 pm PDT (01:29 UTC): light to moderate clear-air turbulence, remarks: zdvwc. 718 nm along the route, 25 nm south of the line.
as filed, and in English
```
RAP UA /OV RAP084081/TM 0129/FL320/TP B763/TB OCNL LGT-MOD CAT/RM ZDVWC
```
Report
a routine report filed through RAP
Where
81 nm east (084°) of RAP
Time
01:29 UTC
Height
at 32,000 ft
Aircraft
B763
Turbulence
occasional light to moderate clear-air turbulence
Remarks
zdvwc
B38M at 23,700 ft, 2 nm northwest, 4:51 pm PDT (23:51 UTC): light turbulence. 1406 nm along the route, 2 nm northwest 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

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 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 15 forecast points nearest it (GEG, GPI, GTF, BIL, MLS, RAP, PIR, ONL, FSD, OMA, DSM, BRL, SPI, EVV, LOU). A plus sign is a headwind, a minus sign a tailwind.

Height	Average wind	Head- or tailwind	Temperature	Ground speed	Time en route	Arrival
5,500 ft	140° at 3 kt	+3 kt	8 °C	117 kt	12 h 47 min	10:33 am EDT (14:33 UTC)
7,500 ft	210° at 3 kt	0	10 °C	120 kt	12 h 28 min	10:14 am EDT (14:14 UTC)
9,500 ft	230° at 8 kt	−3 kt	5 °C	123 kt	12 h 10 min	9:56 am EDT (13:56 UTC)
11,500 ft	230° at 12 kt	−7 kt	3 °C	127 kt	11 h 47 min	9:33 am EDT (13:33 UTC)
13,500 ft	240° at 15 kt	−9 kt	-1 °C	129 kt	11 h 36 min	9:22 am EDT (13:22 UTC)
15,500 ft	240° at 18 kt	−11 kt	-5 °C	131 kt	11 h 25 min	9:11 am EDT (13:11 UTC)
17,500 ft	240° at 21 kt	−13 kt	-10 °C	133 kt	11 h 15 min	9:01 am EDT (13:01 UTC)
18,000 ft FL180	240° at 21 kt	−14 kt	-11 °C	134 kt	11 h 10 min	8:56 am EDT (12:56 UTC)
24,000 ft FL240	240° at 28 kt	−19 kt	-21 °C	139 kt	10 h 46 min	8:32 am EDT (12:32 UTC)
30,000 ft FL300	240° at 35 kt	−25 kt	-35 °C	145 kt	10 h 19 min	8:05 am EDT (12:05 UTC)
34,000 ft FL340	250° at 44 kt	−35 kt	-42 °C	155 kt	9 h 39 min	7:25 am EDT (11:25 UTC)
39,000 ft FL390	260° at 48 kt	−45 kt	-49 °C	165 kt	9 h 04 min	6:50 am EDT (10:50 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
GEG	used from 0 nm out; 25 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°
GPI	used from 100 nm out; 68 nm from the line		060/19 -3°	110/11 -8°	130/6 -8°	200/40 -19°	190/58 -28°	200/101 -39°	220/73 -43°	230/41 -43°
GTF	used from 150 nm out; 85 nm from the line		070/21	080/18 -6°	120/5 -5°	180/30 -14°	200/53 -24°	210/80 -38°	220/83 -44°	230/68 -46°
BIL	used from 299 nm out; 63 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°
MLS	used from 449 nm out; 53 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°
RAP	used from 549 nm out; 78 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°
PIR	used from 698 nm out; 30 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°
ONL	used from 798 nm out; 63 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°
FSD	used from 848 nm out; 51 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°
OMA	used from 948 nm out; 70 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°
DSM	used from 997 nm out; 57 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°
BRL	used from 1147 nm out; 30 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°
SPI	used from 1247 nm out; 18 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°
EVV	used from 1347 nm out; 77 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°
LOU	used from 1446 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°

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
GEG Spokane, WA	departure	VFR Sky: a few clouds at 4,500 feet, a broken layer at 5,500 feet, a broken layer at 10,000 feet	from the northeast (040°) at 15 knots	10+ mi	5,500 ft	2,385 ft	5:53 pm PDT (00:53 UTC)
THM Thompson Falls, MT	90 nm out, 15 nm north of the line	no report just now				2,467 ft
HLN Helena, MT	239 nm out, 11 nm southwest of the line, tower	IFR Sky: scattered clouds at 700 feet, overcast at 1,400 feet Weather: light snow, mist	from the west (280°) at 8 knots	1.25 mi	1,400 ft	3,877 ft	01:36 UTC
BIL Billings, MT	389 nm out, 17 nm southwest of the line, tower	IFR Sky: a broken layer at 800 feet, overcast at 1,200 feet Weather: light snow, mist	from the north (010°) at 12 knots	4 mi	800 ft	3,662 ft	01:23 UTC
EFC Belle Fourche, SD	588 nm out, 15 nm south of the line	no report just now				3,190 ft
PHP Philip, SD	698 nm out, 18 nm south of the line	IFR Sky: overcast at 900 feet Weather: light rain	from the east-southeast (110°) at 3 knots	7 mi	900 ft	2,209 ft	01:28 UTC
AGZ Wagner, SD	858 nm out, 16 nm southwest of the line	VFR	from the northwest (320°) at 8 knots	10+ mi	none	1,477 ft	01:35 UTC
SUX Sioux City, IA	948 nm out, 16 nm southwest of the line, tower	VFR	from the south-southeast (160°) at 4 knots	10+ mi	none	1,098 ft	00:52 UTC
DSM Des Moines, IA	1077 nm out, 8 nm south 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
DEC Decatur, IL	1317 nm out, 9 nm northeast of the line, tower	VFR	calm	10+ mi	none	681 ft	00:54 UTC
MTO Mattoon/Charleston, IL	1356 nm out, 5 nm north of the line	VFR	from the south (190°) at 3 knots	10+ mi	none	722 ft	00:53 UTC
SDF Louisville, KY	destination	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)

The highest airport on this list sits at 3,877 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At SDF when you get there the forecast at the estimated arrival, 6:50 am EDT (10:50 UTC)

Wind from the south-southeast at 3 knots, visibility 4 miles, mist, clear skies marginal VFR

The whole forecast for SDF

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

The forecast for GEG, the departure

From Sun 5:00 pm PDT (00:00 UTC): wind from the northeast at 15 knots, gusting to 22, visibility more than 6 miles, a broken layer at 8,000 feet
From Sun 7:00 pm PDT (02:00 UTC): wind from the northeast at 10 knots, gusting to 20, visibility more than 6 miles, scattered clouds at 7,000 feet
From Sun 11:00 pm PDT (06:00 UTC): wind from the northeast at 7 knots, visibility more than 6 miles, a few clouds at 7,000 feet
From Mon 9:00 am PDT (16:00 UTC): wind light and variable, visibility more than 6 miles, a few clouds at 10,000 feet

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 GEG 6:08 pm PDT (01:08 UTC), at SDF 7:09 pm EDT (23:09 UTC) (civil twilight ends 7:36 pm EDT (23:36 UTC)). At 120 knots the arrival at SDF is before sunrise there (7:48 am EDT (11:48 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: Spokane International, Louisville Muhammad Ali International.