Seattle-Tacoma International to Denver International SEA → DEN
888 nautical miles (1,022 statute miles) southeast on a straight line, true course 114°, about 098° magnetic at the departure end (variation 16E). At 120 knots that is 7 h at the quickest height in today's winds (34,000 ft, a 7-knot tailwind), arriving about 3:54 pm MDT (21:54 UTC). 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: 13,321 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 W27W: thunderstorms (a convective SIGMET) up to 27,000 ft, moving from the west at 45 knots, until 8:55 am PDT (15:55 UTC). Near the route, 579 nm along the route.
as issued
WSUS33 KKCI 121355 MKCW WST 121355 CONVECTIVE SIGMET 27W VALID UNTIL 1555Z WY UT ID FROM 40E PIH-20NW BPI-50E SLC-20SW SLC-40E PIH DMSHG AREA TS MOV FROM 26045KT. TOPS TO FL270.
- AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the route from 50 to 319 nm out.
- AIRMET ZULU 2C: moderate icing up to 18,000 ft. Over the route from 170 to 339 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 170 to 809 nm out.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 349 to 749 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 369 to 619 nm out.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft (due to mountain wave) from 34,000 ft to 43,000 ft. Over the last 190 nm of the route.
- AIRMET TANGO 2W: moderate turbulence below 18,000 ft (due to mountain wave) up to 22,000 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 SEA.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
Not fetched just now.
Winds aloft along the route, and the time en route the forecast for use 14:00–21:00 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 9 forecast points nearest it (SEA, YKM, LWS, BOI, DLN, PIH, LND, RKS, DEN). 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 | 350° at 3 kt | −1 kt | 1 °C | 121 kt | 7 h 20 min | 4:14 pm MDT (22:14 UTC) |
| 7,500 ft | 220° at 3 kt | 0 | 0 °C | 120 kt | 7 h 24 min | 4:18 pm MDT (22:18 UTC) |
| 9,500 ft | 200° at 2 kt | +1 kt | -2 °C | 119 kt | 7 h 28 min | 4:22 pm MDT (22:22 UTC) |
| 11,500 ft | 200° at 5 kt | +1 kt | -5 °C | 119 kt | 7 h 28 min | 4:22 pm MDT (22:22 UTC) |
| 13,500 ft | 210° at 8 kt | +2 kt | -7 °C | 118 kt | 7 h 32 min | 4:26 pm MDT (22:26 UTC) |
| 15,500 ft | 210° at 12 kt | +2 kt | -12 °C | 118 kt | 7 h 32 min | 4:26 pm MDT (22:26 UTC) |
| 17,500 ft | 210° at 16 kt | +3 kt | -15 °C | 117 kt | 7 h 35 min | 4:29 pm MDT (22:29 UTC) |
| 18,000 ft FL180 | 210° at 17 kt | +3 kt | -16 °C | 117 kt | 7 h 35 min | 4:29 pm MDT (22:29 UTC) |
| 24,000 ft FL240 | 210° at 26 kt | +2 kt | -27 °C | 118 kt | 7 h 32 min | 4:26 pm MDT (22:26 UTC) |
| 30,000 ft FL300 | 230° at 32 kt | −6 kt | -34 °C | 126 kt | 7 h 03 min | 3:57 pm MDT (21:57 UTC) |
| 34,000 ft FL340 | 230° at 35 kt | −7 kt | -38 °C | 127 kt | 7 h | 3:54 pm MDT (21:54 UTC) |
| 39,000 ft FL390 | 220° at 40 kt | −6 kt | -43 °C | 126 kt | 7 h 03 min | 3:57 pm MDT (21:57 UTC) |
Based on data from the 12th at 12:00 UTC; valid on the 12th at 18:00 UTC for use 14:00 to 21:00 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 | L/V | L/V 1° | 020/13 -2° | 020/27 -4° | 010/43 -14° | 360/54 -26° | 360/63 -40° | 010/60 -48° | 350/39 -50° |
| YKM | used from 50 nm out; 22 nm from the line | L/V | 350/9 0° | 040/20 -5° | 030/23 -8° | 020/41 -18° | 010/74 -27° | 010/73 -40° | 020/54 -44° | 350/9 -43° |
| LWS | used from 150 nm out; 62 nm from the line | L/V | L/V -2° | 030/6 -5° | 050/10 -10° | 110/19 -21° | 150/22 -31° | 130/11 -36° | 200/6 -37° | 220/21 -40° |
| BOI | used from 299 nm out; 94 nm from the line | 360/9 1° | L/V -5° | 180/10 -12° | 200/58 -21° | 180/62 -31° | 200/41 -31° | 210/34 -32° | 200/29 -41° | |
| DLN | used from 349 nm out; 86 nm from the line | L/V -3° | 170/16 -6° | 180/21 -18° | 190/27 -30° | 210/63 -33° | 210/62 -36° | 210/51 -42° | ||
| PIH | used from 449 nm out; 51 nm from the line | L/V | 180/8 -1° | 190/21 -6° | 210/56 -18° | 190/64 -28° | 210/68 -31° | 210/60 -36° | 210/54 -42° | |
| LND | used from 549 nm out; 74 nm from the line | 220/16 3° | 230/26 -1° | 210/30 -14° | 220/57 -26° | 220/60 -31° | 220/62 -38° | 220/52 -44° | ||
| RKS | used from 649 nm out; 31 nm from the line | 210/15 | 220/17 -1° | 220/32 -14° | 220/69 -25° | 220/70 -30° | 220/70 -39° | 220/56 -44° | ||
| DEN | used from 799 nm out; 65 nm from the line | 230/7 11° | 230/13 4° | 230/40 -9° | 230/48 -20° | 240/66 -32° | 240/88 -38° | 230/100 -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 |
|---|---|---|---|---|---|---|---|
| SEA Seattle, WA | departure | no report just now | 432 ft | ||||
| ELN Ellensburg, WA | 80 nm out, 9 nm north of the line | no report just now | 1,763 ft | ||||
| PSC Pasco, WA | 150 nm out, 8 nm southwest of the line, tower | no report just now | 410 ft | ||||
| ALW Walla Walla, WA | 180 nm out, 5 nm southeast of the line, tower | no report just now | 1,194 ft | ||||
| MYL Mc Call, ID | 299 nm out, 22 nm southwest of the line | no report just now | 5,024 ft | ||||
| LLJ Challis, ID | 379 nm out, 1 nm south of the line | no report just now | 5,075 ft | ||||
| IDA Idaho Falls, ID | 489 nm out, 6 nm south of the line, tower | no report just now | 4,743 ft | ||||
| BPI Big Piney, WY | 589 nm out, 8 nm south of the line | no report just now | 6,993 ft | ||||
| DWX Dixon, WY | 739 nm out, 18 nm south of the line | no report just now | 6,548 ft | ||||
| BJC Denver, CO | 868 nm out, 10 nm southwest of the line, tower | no report just now | 5,673 ft | ||||
| DEN Denver, CO | destination | no report just now | 5,433 ft |
The highest airport on this list sits at 6,993 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At DEN when you get there the forecast at the estimated arrival, 3:54 pm MDT (21:54 UTC)
DEN 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 SEA 6:25 pm PDT (01:25 UTC), at DEN 6:22 pm MDT (00:22 UTC) (civil twilight ends 6:49 pm MDT (00:49 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
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, Denver International.