Plan a flight · Sun 8:43 pm CDT (01:43 UTC)

Shreveport Regional to Seattle-Tacoma International SHV → SEA

1,576 nautical miles (1,814 statute miles) northwest on a straight line, true course 313°, about 311° magnetic at the departure end (variation 2E). At 120 knots that is 12 h 36 min at the quickest height in today's winds (4,500 ft, a 5-knot tailwind), arriving about 7:19 am PDT (14:19 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: 1 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 1W: thunderstorms (a convective SIGMET) up to 34,000 ft, moving from the southwest at 40 knots, until 9:55 pm CDT (02:55 UTC). Near the route, 838 nm along the route.

as issued

WSUS33 KKCI 120055
MKCW WST 120055
CONVECTIVE SIGMET 1W
VALID UNTIL 0255Z
CO NM WY AZ UT
FROM 40NNW CHE-40WNW TBE-60WNW CME-40N SJN-40ESE MTU-40NNW CHE
AREA SEV TS MOV FROM 23040KT. TOPS TO FL340.
WIND GUSTS TO 60KT POSS.

SIGMET 3W: thunderstorms (a convective SIGMET) up to 31,000 ft, moving from the southwest at 40 knots, until 9:55 pm CDT (02:55 UTC). Near the route, 938 nm along the route.
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 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 379 to 569 nm out.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 599 to 1048 nm out.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 629 to 1287 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). Over the route from 738 to 1028 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 748 to 748 nm out.
AIRMET TANGO 5W: strong surface winds (30 knots or more) (due to sustained surface winds greater than 30 knots). Over the route from 828 to 918 nm out.
AIRMET ZULU 3C: moderate icing up to 22,000 ft. Over the route from 858 to 1237 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 858 to 1397 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 1008 to 1247 nm out.
AIRMET ZULU 2C: moderate icing up to 16,000 ft. Over the route from 1257 to 1477 nm out.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the last 140 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 SHV.

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

A320 at 26,500 ft, 33 nm southwest, 5:46 pm CDT (22:46 UTC): moderate clear-air turbulence, remarks: ZFW86. At the departure end, 33 nm southwest of the line.
as filed, and in English
```
GGG UA /OV GGG/TM 2246/FL265/TP A320/TB MOD CAT/RM ZFW86
```
Report
a routine report filed through GGG
Where
over GGG
Time
22:46 UTC
Height
at 26,500 ft
Aircraft
A320
Turbulence
moderate clear-air turbulence
Remarks
ZFW86
UAL2199 at 35,000 ft, 44 nm northeast, 6:31 pm CDT (23:31 UTC): moderate chop turbulence, wind 247° at 79 knots. 659 nm along the route, 44 nm northeast of the line.
as filed, and in English
```
ARP UAL2199 4007N 10337W 2331 F350 247/079KT TB MOD CHOP IC
```
Report
a routine report filed through ARP
A21N at 32,000 ft, 45 nm northeast, 6:42 pm CDT (23:42 UTC): moderate chop turbulence, remarks: ZDVWC-61. 668 nm along the route, 45 nm northeast of the line.
as filed, and in English
```
AKO UA /OV AKO270030/TM 2342/FL320/TP A21N/TB INTMT MOD CHOP/RM ZDVWC-61
```
Report
a routine report filed through AKO
Where
30 nm west (270°) of AKO
Time
23:42 UTC
Height
at 32,000 ft
Aircraft
A21N
Turbulence
intermittent moderate chop
Remarks
ZDVWC-61
GLF5 at 45,000 ft, 30 nm southwest, 5:44 pm CDT (22:44 UTC): moderate turbulence, remarks: ZDVWC-46. 668 nm along the route, 30 nm southwest of the line.
as filed, and in English
```
COS UA /OV COS350025/TM 2244/FL450/TP GLF5/TB MOD /RM ZDVWC-46
```
Report
a routine report filed through COS
Where
25 nm north (350°) of COS
Time
22:44 UTC
Height
at 45,000 ft
Aircraft
GLF5
Turbulence
moderate
Remarks
ZDVWC-46
BCS1 at 24,000 ft, 11 nm south, 8:30 pm CDT (01:30 UTC): moderate turbulence from 22,000 ft to 24,000 ft, remarks: during the climb ZDVWC-05. 718 nm along the route, 11 nm south of the line.
as filed, and in English
```
DEN UA /OV DVV270030/TM 0130/FL240/TP BCS1/TB MOD 220-240/RM DURC ZDVWC-05
```
Report
a routine report filed through DEN
Where
30 nm west (270°) of DVV
Time
01:30 UTC
Height
at 24,000 ft
Aircraft
BCS1
Turbulence
moderate from 22,000 ft to 24,000 ft
Remarks
during the climb ZDVWC-05
BCS3 at 24,000 ft, 16 nm northeast, 6:28 pm CDT (23:28 UTC): moderate turbulence from 22,000 ft to 24,000 ft, remarks: during the descent. 728 nm along the route, 16 nm northeast of the line.
as filed, and in English
```
DEN UA /OV DEN320045/TM 2328/FL240/TP BCS3/TB MOD 240-220/RM DURD
```
Report
a routine report filed through DEN
Where
45 nm northwest (320°) of DEN
Time
23:28 UTC
Height
at 24,000 ft
Aircraft
BCS3
Turbulence
moderate from 24,000 ft to 22,000 ft
Remarks
during the descent
CRJ2 at 19,000 ft, 12 nm northeast, 7:47 pm CDT (00:47 UTC): moderate chop turbulence, remarks: ZDVWC-13. 768 nm along the route, 12 nm northeast of the line.
as filed, and in English
```
EGE UA /OV RLG010052/TM 0047/FL190/TP CRJ2/TB COSN MOD CHOP/RM ZDVWC-13
```
Report
a routine report filed through EGE
Where
52 nm north (010°) of RLG
Time
00:47 UTC
Height
at 19,000 ft
Aircraft
CRJ2
Turbulence
cosn moderate chop
Remarks
ZDVWC-13
B39M at 32,000 ft, 22 nm southwest, 6:58 pm CDT (23:58 UTC): moderate chop turbulence, no icing, remarks: moderate mtw a 30-knot loss of airspeed ZDVWC-14. 768 nm along the route, 22 nm southwest of the line.
as filed, and in English
```
EEO UA /OV EKR069073/TM 2358/FL320/TP B39M/TB OCNL MOD CHOP/IC NEG/RM MOD MTW +/-30KT ZDVWC-14
```
Report
a routine report filed through EEO
Where
73 nm east (069°) of EKR
Time
23:58 UTC
Height
at 32,000 ft
Aircraft
B39M
Turbulence
occasional moderate chop
Icing
none
Remarks
moderate mtw a 30-knot loss of airspeed ZDVWC-14
A320 at 8,000 ft, 19 nm northeast, 6:42 pm CDT (23:42 UTC): light chop turbulence from 8,000 ft to 16,000 ft, remarks: during the climb. 659 nm along the route, 19 nm northeast of the line.
as filed, and in English
```
DEN UA /OV DEN080030/TM 2342/FL080/TP A320/TB LGT CHOP 080-160/RM DURC
```
Report
a routine report filed through DEN
Where
30 nm east (080°) of DEN
Time
23:42 UTC
Height
at 8,000 ft
Aircraft
A320
Turbulence
light chop from 8,000 ft to 16,000 ft
Remarks
during the climb
GLF6 at 40,000 ft, 36 nm southwest, 7:48 pm CDT (00:48 UTC): light to moderate chop turbulence, remarks: ZDVWC-46. 668 nm along the route, 36 nm southwest of the line.
as filed, and in English
```
COS UA /OV COS340020/TM 0048/FL400/TP GLF6/TB LGT-MOD CHOP/RM ZDVWC-46
```
Report
a routine report filed through COS
Where
20 nm north (340°) of COS
Time
00:48 UTC
Height
at 40,000 ft
Aircraft
GLF6
Turbulence
light to moderate chop
Remarks
ZDVWC-46
B737 at 14,000 ft, 20 nm southwest, 7:20 pm CDT (00:20 UTC): light to moderate turbulence, remarks: light to moderate from 14,000 ft to 16,000 ft occn light above 16,000 ft. 668 nm along the route, 20 nm southwest of the line.
as filed, and in English
```
DEN UA /OV DEN170025/TM 0020/FL140/TP B737/TB LGT-MOD/RM LGT-MOD 140-160 OCCN LGT ABOVE 160
```
Report
a routine report filed through DEN
Where
25 nm south (170°) of DEN
Time
00:20 UTC
Height
at 14,000 ft
Aircraft
B737
Turbulence
light to moderate
Remarks
light to moderate from 14,000 ft to 16,000 ft occn light above 16,000 ft
B738 at 35,000 ft, 45 nm northeast, 6:30 pm CDT (23:30 UTC): light turbulence, remarks: ZDVWC-07. 668 nm along the route, 45 nm northeast of the line.
as filed, and in English
```
AKO UA /OV AKO270030/TM 2330/FL350/TP B738/TB CONS LGT /RM ZDVWC-07
```
Report
a routine report filed through AKO
Where
30 nm west (270°) of AKO
Time
23:30 UTC
Height
at 35,000 ft
Aircraft
B738
Turbulence
continuous light
Remarks
ZDVWC-07
E55P at 38,000 ft, 45 nm southwest, 8:23 pm CDT (01:23 UTC): light chop turbulence, remarks: ZDVWC-05. 678 nm along the route, 45 nm southwest of the line.
as filed, and in English
```
DEN UA /OV FQF200040/TM 0123/FL380/TP E55P/TB LGT CHOP/RM ZDVWC-05
```
Report
a routine report filed through DEN
Where
40 nm south (200°) of FQF
Time
01:23 UTC
Height
at 38,000 ft
Aircraft
E55P
Turbulence
light chop
Remarks
ZDVWC-05
B737 descending, 3 nm southeast, 8:23 pm CDT (01:23 UTC): no turbulence up to 10,000 ft. 688 nm along the route, 3 nm southeast of the line.
as filed, and in English
```
DEN UA /OV DEN/TM 0123/FLDURD/TP B737/TB NEG BLO 100
```
Report
a routine report filed through DEN
Where
over DEN
Time
01:23 UTC
Height
during the descent
Aircraft
B737
Turbulence
no below 10,000 ft

13 more routine reports are on the map.

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 15 forecast points nearest it (SHV, DAL, OKC, GAG, GCK, GLD, DEN, RKS, LND, PIH, DLN, BOI, LWS, 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	200° at 11 kt	−5 kt	18 °C	125 kt	12 h 36 min	7:19 am PDT (14:19 UTC)
6,500 ft	210° at 11 kt	−3 kt	10 °C	123 kt	12 h 49 min	7:32 am PDT (14:32 UTC)
8,500 ft	210° at 15 kt	−3 kt	8 °C	123 kt	12 h 49 min	7:32 am PDT (14:32 UTC)
10,500 ft	220° at 17 kt	−1 kt	4 °C	121 kt	13 h 01 min	7:44 am PDT (14:44 UTC)
12,500 ft	220° at 20 kt	+1 kt	0 °C	119 kt	13 h 15 min	7:58 am PDT (14:58 UTC)
14,500 ft	220° at 22 kt	+2 kt	-4 °C	118 kt	13 h 21 min	8:04 am PDT (15:04 UTC)
16,500 ft	220° at 24 kt	+3 kt	-8 °C	117 kt	13 h 28 min	8:11 am PDT (15:11 UTC)
18,000 ft FL180	230° at 25 kt	+4 kt	-11 °C	116 kt	13 h 35 min	8:18 am PDT (15:18 UTC)
24,000 ft FL240	230° at 28 kt	+5 kt	-21 °C	115 kt	13 h 42 min	8:25 am PDT (15:25 UTC)
30,000 ft FL300	230° at 35 kt	+11 kt	-32 °C	109 kt	14 h 28 min	9:11 am PDT (16:11 UTC)
34,000 ft FL340	240° at 44 kt	+21 kt	-38 °C	99 kt	15 h 55 min	10:38 am PDT (17:38 UTC)
39,000 ft FL390	250° at 46 kt	+27 kt	-46 °C	93 kt	16 h 57 min	11:40 am PDT (18:40 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
SHV	used from 0 nm out; 25 nm from the line	190/11	230/19 17°	230/26 12°	260/15 7°	280/16 -4°	300/17 -15°	300/34 -30°	300/31 -41°	310/42 -52°
DAL	used from 100 nm out; 85 nm from the line	180/21	190/24 15°	230/20 12°	220/23 8°	240/22 -5°	230/18 -15°	280/33 -29°	280/36 -39°	300/33 -52°
OKC	used from 150 nm out; 84 nm from the line	190/29	200/29 16°	230/22 14°	240/17 9°	240/28 -6°	250/35 -15°	270/42 -29°	270/43 -39°	280/38 -51°
GAG	used from 299 nm out; 54 nm from the line		190/34 19°	240/27 14°	240/26 8°	240/24 -6°	240/29 -16°	250/50 -28°	250/50 -39°	260/46 -50°
GCK	used from 399 nm out; 53 nm from the line		200/35 21°	220/34 14°	240/30 8°	240/27 -6°	240/31 -17°	240/53 -30°	250/55 -39°	250/60 -50°
GLD	used from 549 nm out; 64 nm from the line		190/29	200/30 15°	240/23 8°	250/39 -7°	230/39 -19°	230/57 -31°	240/67 -39°	250/62 -49°
DEN	used from 599 nm out; 64 nm from the line			190/31 16°	210/32 7°	240/41 -8°	230/47 -21°	240/56 -32°	250/65 -37°	250/61 -47°
RKS	used from 798 nm out; 93 nm from the line			190/43	210/65 3°	210/57 -9°	210/56 -21°	210/47 -33°	230/63 -37°	240/77 -46°
LND	used from 948 nm out; 52 nm from the line			180/33 10°	190/50 3°	210/59 -9°	200/50 -21°	190/41 -34°	230/55 -39°	240/65 -47°
PIH	used from 998 nm out; 79 nm from the line		270/10	270/13 1°	210/16 -2°	200/56 -11°	200/51 -23°	200/68 -33°	220/77 -37°	230/73 -44°
DLN	used from 1147 nm out; 76 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°
BOI	used from 1197 nm out; 95 nm from the line		330/14 4°	230/5 -2°	220/20 -7°	210/37 -20°	200/59 -26°	200/67 -34°	210/73 -35°	220/62 -41°
LWS	used from 1247 nm out; 90 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°
YKM	used from 1397 nm out; 69 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 1547 nm out; 15 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	Elevation
SHV Shreveport, LA	departure	no report just now	257 ft
PRX Paris, TX	110 nm out, 3 nm south of the line	no report just now	547 ft
OUN Norman, OK	249 nm out, 3 nm east of the line, tower	no report just now	1,181 ft
GCK Garden City, KS	469 nm out, 24 nm northeast of the line, tower	no report just now	2,890 ft
LIC Limon, CO	629 nm out, 2 nm north of the line	no report just now	5,374 ft
DEN Denver, CO	688 nm out, 2 nm northeast of the line, tower	no report just now	5,433 ft
DWX Dixon, WY	838 nm out, 17 nm south of the line	no report just now	6,548 ft
IDA Idaho Falls, ID	1088 nm out, 5 nm south of the line, tower	no report just now	4,743 ft
LLJ Challis, ID	1197 nm out, 1 nm southeast of the line	no report just now	5,075 ft
ALW Walla Walla, WA	1397 nm out, 5 nm southeast of the line, tower	no report just now	1,194 ft
PSC Pasco, WA	1427 nm out, 7 nm southwest of the line, tower	no report just now	410 ft
SEA Seattle, WA	destination	no report just now	432 ft

The highest airport on this list sits at 6,548 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, 7:19 am PDT (14:19 UTC)

SEA has no terminal forecast; use the nearest airport that does.

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 SHV 6:46 pm CDT (23:46 UTC), at SEA 6:27 pm PDT (01:27 UTC) (civil twilight ends 6:58 pm PDT (01:58 UTC)). At 120 knots the arrival at SEA is before sunrise there (7:23 am PDT (14:23 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 lower Mississippi valley · loop National Weather Service

Radar now, the southern Plains · loop National Weather Service

Radar now, the southern 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: Shreveport Regional, Seattle-Tacoma International.