Aspen-Pitkin County/Sardy Field to San Francisco International ASE → SFO
735 nautical miles (846 statute miles) west on a straight line, true course 267°, about 258° magnetic at the departure end (variation 9E). At 120 knots that is 6 h 52 min at the quickest height in today's winds (8,500 ft, a 13-knot headwind), arriving about 6:30 am PDT (13:30 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: 704 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 W15W: thunderstorms (a convective SIGMET) up to 28,000 ft, moving from the southwest at 20 knots, until 1:55 am MDT (07:55 UTC). Over the route from 417 to 516 nm out.
as issued
WSUS33 KKCI 120555 MKCW WST 120555 CONVECTIVE SIGMET 15W VALID UNTIL 0755Z UT NV FROM 60WNW BVL-10NE BVL-80E OAL-40SE OAL-20W OAL-60WNW BVL AREA TS MOV FROM 24020KT. TOPS TO FL280.
- 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 first 79 nm of the route.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 38,000 ft. Over the first 238 nm of the route.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the first 427 nm of the route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 30 to 487 nm out.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 109 to 447 nm out.
- AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the last 99 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 ASE.
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 02:00–09:00 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 7 forecast points nearest it (GJT, BCE, ELY, BIH, FAT, SAC, SFO). A plus sign is a headwind, a minus sign a tailwind.
| Height | Average wind | Head- or tailwind | Temperature | Ground speed | Time en route | Arrival |
|---|---|---|---|---|---|---|
| 8,500 ft | 210° at 24 kt | +13 kt | 4 °C | 107 kt | 6 h 52 min | 6:30 am PDT (13:30 UTC) |
| 10,500 ft | 220° at 24 kt | +16 kt | 0 °C | 104 kt | 7 h 04 min | 6:42 am PDT (13:42 UTC) |
| 12,500 ft | 220° at 25 kt | +18 kt | -3 °C | 102 kt | 7 h 12 min | 6:50 am PDT (13:50 UTC) |
| 14,500 ft | 220° at 27 kt | +19 kt | -7 °C | 101 kt | 7 h 17 min | 6:55 am PDT (13:55 UTC) |
| 16,500 ft | 220° at 30 kt | +21 kt | -11 °C | 99 kt | 7 h 25 min | 7:03 am PDT (14:03 UTC) |
| 18,000 ft FL180 | 220° at 32 kt | +22 kt | -14 °C | 98 kt | 7 h 30 min | 7:08 am PDT (14:08 UTC) |
| 24,000 ft FL240 | 220° at 41 kt | +31 kt | -23 °C | 89 kt | 8 h 16 min | 7:54 am PDT (14:54 UTC) |
| 30,000 ft FL300 | 220° at 48 kt | +36 kt | -29 °C | 84 kt | 8 h 45 min | 8:23 am PDT (15:23 UTC) |
| 34,000 ft FL340 | 220° at 52 kt | +39 kt | -34 °C | 81 kt | 9 h 04 min | 8:42 am PDT (15:42 UTC) |
| 39,000 ft FL390 | 220° at 49 kt | +36 kt | -44 °C | 84 kt | 8 h 45 min | 8:23 am PDT (15:23 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| GJT | used from 0 nm out; 53 nm from the line | 210/43 7° | 230/45 1° | 220/49 -12° | 220/62 -22° | 220/59 -28° | 230/60 -33° | 220/55 -45° | ||
| BCE | used from 199 nm out; 78 nm from the line | 220/27 -1° | 210/40 -13° | 220/54 -21° | 220/64 -30° | 220/64 -34° | 220/52 -44° | |||
| ELY | used from 298 nm out; 60 nm from the line | 200/39 3° | 210/27 -2° | 210/45 -15° | 220/56 -24° | 210/60 -28° | 210/63 -34° | 220/61 -43° | ||
| BIH | used from 447 nm out; 94 nm from the line | L/V | 240/7 1° | 190/13 -3° | 200/26 -16° | 210/43 -26° | 220/54 -28° | 220/51 -35° | 220/47 -43° | |
| FAT | used from 596 nm out; 75 nm from the line | 130/16 | 160/20 5° | 190/28 -1° | 210/25 -5° | 220/27 -15° | 230/21 -26° | 220/42 -29° | 220/44 -35° | 220/44 -44° |
| SAC | used from 645 nm out; 46 nm from the line | 110/6 | L/V 4° | 010/11 -2° | 350/11 -7° | 340/24 -16° | 360/44 -23° | 330/24 -30° | 270/21 -35° | 230/23 -43° |
| SFO | used from 695 nm out; 20 nm from the line | 120/13 | 090/14 5° | 040/14 -1° | 350/17 -5° | 360/42 -14° | 360/64 -23° | 350/38 -32° | 300/19 -37° | 250/18 -44° |
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 |
|---|---|---|---|---|---|---|---|
| ASE Aspen, CO | departure | no report just now | 7,837 ft | ||||
| GWS Glenwood Springs, CO | 20 nm out, 18 nm north of the line | no report just now | 5,921 ft | ||||
| GJT Grand Junction, CO | 79 nm out, 3 nm southeast of the line, tower | no report just now | 4,861 ft | ||||
| FOM Fillmore, UT | 258 nm out, 4 nm north of the line | no report just now | 4,984 ft | ||||
| TPH Tonopah, NV | 487 nm out, 21 nm south of the line | no report just now | 5,430 ft | ||||
| HTH Hawthorne, NV | 546 nm out, 21 nm north of the line | no report just now | 4,230 ft | ||||
| CPU San Andreas, CA | 645 nm out, 15 nm north of the line | no report just now | 1,327 ft | ||||
| LVK Livermore, CA | 705 nm out, 3 nm southwest of the line, tower | no report just now | 399 ft | ||||
| SFO San Francisco, CA | destination | no report just now | 13 ft |
The highest airport on this list sits at 7,837 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At SFO when you get there the forecast at the estimated arrival, 6:30 am PDT (13:30 UTC)
SFO has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
- 6/7094 45NM NE MERCED, CA, Sunday, October 4, 2026 through Tuesday, October 20, 2026 UTC 20 nm from the route, 616 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 20 October · ZOA
- 6/7231 Santa Clara, CA, Sunday, October 11, 2026 through Monday, October 12, 2026 UTC 16 nm from the route, at the destination end · drones kept away from a public gathering · until 12 October · ZOA
Daylight
Sunset at ASE 6:31 pm MDT (00:31 UTC), at SFO 6:36 pm PDT (01:36 UTC) (civil twilight ends 7:02 pm PDT (02:02 UTC)). At 120 knots the arrival at SFO is before sunrise there (7:14 am PDT (14:14 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: Aspen-Pitkin County/Sardy Field, San Francisco International.