Boise Air Trml/Gowen Field to Fairbanks International BOI → FAI
1,657 nautical miles (1,907 statute miles) northwest on a straight line, true course 331°, about 318° magnetic at the departure end (variation 13E). At 120 knots that is 13 h 48 min at the quickest height in today's winds (4,500 ft, no wind along the track), arriving about 12:28 pm AKDT (20:28 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: 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
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Near the route, at the departure end.
- AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the first 50 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 70 to 260 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 110 to 170 nm out.
- AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the route from 170 to 369 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 BOI.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- urgent B737 descending, 45 nm southwest, 9:53 pm MDT (03:53 UTC): remarks: during the descent runway 8 low-level wind shear a 10-knot loss of airspeed jnut akfss. 1118 nm along the route, 45 nm southwest of the line.
as filed, and in English
JNU UUA /OV JNU /TM 0353 /FLUNKN /TP B737 /RM DURD RY8 LLWS +/-10KTS JNUT AKFSS
- Report
- an urgent report filed through JNU
- Where
- over JNU
- Time
- 03:53 UTC
- Height
- height not given
- Aircraft
- B737
- Remarks
- during the descent runway 8 low-level wind shear a 10-knot loss of airspeed jnut akfss
- E75L descending, 37 nm southwest, 10:35 pm MDT (04:35 UTC): light turbulence from 11,000 ft to 14,000 ft, light rime icing from 8,000 ft to 12,000 ft, -10 °C. 170 nm along the route, 37 nm southwest of the line.
as filed, and in English
GEG UA /OV PDT/TM 0435/FLDURD/TP E75L/TA M10/TB LT TURB 140-110/IC LT RIME 120-080
- Report
- a routine report filed through GEG
- Where
- over PDT
- Time
- 04:35 UTC
- Height
- during the descent
- Aircraft
- E75L
- Temperature
- −10 °C
- Turbulence
- lt turbulence from 14,000 ft to 11,000 ft
- Icing
- lt rime from 12,000 ft to 8,000 ft
- E75L at 1,500 ft, 25 nm southwest, 10:49 pm MDT (04:49 UTC): remarks: low-level wind shear loss of 8 knots on final. 200 nm along the route, 25 nm southwest of the line.
as filed, and in English
PSC UA /OV PSC120003/TM 0449/FL015/TP E75L/RM LLWS LOSS OF 8 KTS ON FINAL
- Report
- a routine report filed through PSC
- Where
- 3 nm southeast (120°) of PSC
- Time
- 04:49 UTC
- Height
- at 1,500 ft
- Aircraft
- E75L
- Remarks
- low-level wind shear loss of 8 knots on final
- B737 at 2,200 ft, 45 nm southwest, 12:09 am MDT (06:09 UTC): light chop turbulence, no icing, a broken layer above 2,200 ft, remarks: during the climb zan. 1118 nm along the route, 45 nm southwest of the line.
as filed, and in English
JNU UA /OV JNU/TM 0609/FL022/TP B737/SK BKN022/TB LGT CHOP/IC NEG/RM DURC/ ZAN
- Report
- a routine report filed through JNU
- Where
- over JNU
- Time
- 06:09 UTC
- Height
- at 2,200 ft
- Aircraft
- B737
- Sky
- a broken layer from 2,200 ft
- Turbulence
- light chop
- Icing
- none
- Remarks
- during the climb zan
- B737 descending, 45 nm southwest, 10:53 pm MDT (04:53 UTC): light chop turbulence, remarks: during the descent runway 8 akfss. 1118 nm along the route, 45 nm southwest of the line.
as filed, and in English
JNU UA /OV JNU /TM 0453 /FLUNKN /TP B737 /TB LGT CHOP /RM DURD RY8 AKFSS
- Report
- a routine report filed through JNU
- Where
- over JNU
- Time
- 04:53 UTC
- Height
- height not given
- Aircraft
- B737
- Turbulence
- light chop
- Remarks
- during the descent runway 8 akfss
- BE20 at 1,200 ft, 2 nm southwest, 9:42 pm MDT (03:42 UTC): remarks: on final runway 20R ais 2SM fai atct akfss. At the destination end, 2 nm southwest of the line.
as filed, and in English
FAI UA /OV PAFA200002 /TM 0342 /FL012 /TP BE20 /RM ON FINAL RWY 20R AIS 2SM FAI ATCT AKFSS
- Report
- a routine report filed through FAI
- Where
- 2 nm south (200°) of PAFA
- Time
- 03:42 UTC
- Height
- at 1,200 ft
- Aircraft
- BE20
- Remarks
- on final runway 20R ais 2SM fai atct akfss
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 4 forecast points nearest it (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 | 050° at 9 kt | 0 | 2 °C | 120 kt | 13 h 48 min | 12:28 pm AKDT (20:28 UTC) |
| 6,500 ft | 050° at 11 kt | +1 kt | 0 °C | 119 kt | 13 h 55 min | 12:35 pm AKDT (20:35 UTC) |
| 8,500 ft | 040° at 12 kt | +1 kt | -4 °C | 119 kt | 13 h 55 min | 12:35 pm AKDT (20:35 UTC) |
| 10,500 ft | 030° at 19 kt | +5 kt | -6 °C | 115 kt | 14 h 25 min | 1:05 pm AKDT (21:05 UTC) |
| 12,500 ft | 030° at 28 kt | +10 kt | -9 °C | 110 kt | 15 h 04 min | 1:44 pm AKDT (21:44 UTC) |
| 14,500 ft | 020° at 35 kt | +17 kt | -11 °C | 103 kt | 16 h 05 min | 2:45 pm AKDT (22:45 UTC) |
| 16,500 ft | 010° at 42 kt | +24 kt | -14 °C | 96 kt | 17 h 16 min | 3:56 pm AKDT (23:56 UTC) |
| 18,000 ft FL180 | 010° at 48 kt | +30 kt | -16 °C | 90 kt | 18 h 25 min | 5:05 pm AKDT (01:05 UTC) |
| 24,000 ft FL240 | 010° at 55 kt | +34 kt | -27 °C | 86 kt | 19 h 16 min | 5:56 pm AKDT (01:56 UTC) |
| 30,000 ft FL300 | 360° at 59 kt | +45 kt | -39 °C | 75 kt | 22 h 06 min | 8:46 pm AKDT (04:46 UTC) |
| 34,000 ft FL340 | 360° at 50 kt | +39 kt | -45 °C | 81 kt | 20 h 27 min | 7:07 pm AKDT (03:07 UTC) |
| 39,000 ft FL390 | 320° at 17 kt | +16 kt | -42 °C | 104 kt | 15 h 56 min | 2:36 pm AKDT (22:36 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| BOI | used from 0 nm out; 25 nm from the line | 300/7 2° | 280/5 -4° | 210/16 -9° | 210/60 -20° | 210/75 -29° | 210/63 -32° | 220/64 -32° | 220/54 -39° | |
| LWS | used from 100 nm out; 66 nm from the line | 070/10 | 080/12 -2° | 030/12 -6° | 080/7 -10° | 170/34 -21° | 160/46 -32° | 200/33 -35° | 220/22 -35° | 230/18 -38° |
| YKM | used from 200 nm out; 71 nm from the line | 070/10 | 040/15 -1° | 020/27 -8° | 030/25 -13° | 020/48 -20° | 010/83 -27° | 010/77 -37° | 010/49 -40° | 350/14 -41° |
| SEA | used from 300 nm out; 100 nm from the line | 050/7 | 050/11 1° | 050/12 -5° | 030/31 -7° | 010/61 -15° | 010/69 -26° | 360/73 -40° | 360/62 -47° | 330/21 -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 |
|---|---|---|---|---|---|---|---|
| BOI Boise, ID | departure | no report just now | 2,871 ft | ||||
| JSY Joseph, OR | 120 nm out, 15 nm east of the line | no report just now | 4,126 ft | ||||
| ALW Walla Walla, WA | 180 nm out, 5 nm south of the line, tower | no report just now | 1,194 ft | ||||
| CYYD Smithers, | 799 nm out, 5 nm northeast of the line | no report just now | 1,716 ft | ||||
| TKL Taku Lodge, AK | 1108 nm out, 25 nm southwest of the line | no report just now | 0 ft | ||||
| CYHT Haines Junction, | 1288 nm out, 6 nm southwest of the line | no report just now | 2,150 ft | ||||
| CYXQ Beaver Creek, | 1418 nm out, 4 nm northwest of the line | no report just now | 2,129 ft | ||||
| 6K8 Tok, AK | 1498 nm out, 7 nm north of the line | no report just now | 1,642 ft | ||||
| FAI Fairbanks, AK | destination | no report just now | 439 ft |
The highest airport on this list sits at 4,126 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At FAI when you get there the forecast at the estimated arrival, 12:28 pm AKDT (20:28 UTC)
FAI has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
- 6/6654 28NM W TWISP, WA, Thursday, October 1, 2026 through Thursday, October 15, 2026 UTC 18 nm from the route, 349 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 15 October · ZSE
Daylight
Sunset at BOI 7:05 pm MDT (01:05 UTC), at FAI 6:39 pm AKDT (02:39 UTC) (civil twilight ends 7:29 pm AKDT (03:29 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: Boise Air Trml/Gowen Field, Fairbanks International.