Ted Stevens Anchorage International to Boise Air Trml/Gowen Field ANC → BOI
1,597 nautical miles (1,838 statute miles) southeast on a straight line, true course 116°, about 100° magnetic at the departure end (variation 16E). At 120 knots that is 9 h 30 min at the quickest height in today's winds (30,000 ft, a 48-knot tailwind), arriving about 6:30 pm MDT (00:30 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: 32 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 TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the route from 1278 to 1577 nm out.
- AIRMET ZULU 2C: moderate icing up to 18,000 ft. Over the route from 1417 to 1507 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1417 to 1507 nm out.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the last 0 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 ANC.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- B190 at 5,000 ft, 11 nm north, 6:44 am AKDT (14:44 UTC): no turbulence, no icing, remarks: during the descent. At the departure end, 11 nm north of the line.
as filed, and in English
ANC UA /OV TED330012/TM 1444/FL050/TP B190/TB NEG/IC NEG/RM DURD
- Report
- a routine report filed through ANC
- Where
- 12 nm northwest (330°) of TED
- Time
- 14:44 UTC
- Height
- at 5,000 ft
- Aircraft
- B190
- Turbulence
- none
- Icing
- none
- Remarks
- during the descent
- C208 climbing, 48 nm southwest, 4:59 am AKDT (12:59 UTC): clear up to 60,000 ft, remarks: during the climb zan. At the departure end, 48 nm southwest of the line.
as filed, and in English
ENA UA /OV ENA/TM 1259/FLUNKN/TP C208/SK SKC/RM DURC/ ZAN
- Report
- a routine report filed through ENA
- Where
- over ENA
- Time
- 12:59 UTC
- Height
- height not given
- Aircraft
- C208
- Sky
- clear
- Remarks
- during the climb zan
- B190 at 3,000 ft, 26 nm north, 6:16 am AKDT (14:16 UTC): no turbulence, no icing, a broken layer from 3,000 ft to 10,000 ft, remarks: during the climb zan. 140 nm along the route, 26 nm north of the line.
as filed, and in English
CDV UA /OV CDV/TM 1416/FL030/TP B190/SK BKN 030-TOP 100/TB NEG/IC NEG/RM DURC ZAN
- Report
- a routine report filed through CDV
- Where
- over CDV
- Time
- 14:16 UTC
- Height
- at 3,000 ft
- Aircraft
- B190
- Sky
- a broken layer from 3,000 ft, tops 10,000 ft
- Turbulence
- none
- Icing
- none
- Remarks
- during the climb zan
- B737 at 7,000 ft, 19 nm northeast, 6:44 am AKDT (14:44 UTC): remarks: during the descent runway 11 ragged tops from 11,500 ft to 7,000 ft akfss. 519 nm along the route, 19 nm northeast of the line.
as filed, and in English
SIT UA /OV SIT /TM 1444 /FL070 /TP B737 /RM DURD RY11 RAGGED TOPS 115-070 AKFSS
- Report
- a routine report filed through SIT
- Where
- over SIT
- Time
- 14:44 UTC
- Height
- at 7,000 ft
- Aircraft
- B737
- Remarks
- during the descent runway 11 ragged tops from 11,500 ft to 7,000 ft akfss
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 5 forecast points nearest it (ANC, MDO, YAK, JNU, ANN). A plus sign is a headwind, a minus sign a tailwind.
| Height | Average wind | Head- or tailwind | Temperature | Ground speed | Time en route | Arrival |
|---|---|---|---|---|---|---|
| 3,500 ft | 210° at 11 kt | +2 kt | 118 kt | 13 h 32 min | 10:32 pm MDT (04:32 UTC) | |
| 5,500 ft | 250° at 7 kt | −4 kt | 124 kt | 12 h 53 min | 9:53 pm MDT (03:53 UTC) | |
| 7,500 ft | 250° at 11 kt | −6 kt | -4 °C | 126 kt | 12 h 40 min | 9:40 pm MDT (03:40 UTC) |
| 9,500 ft | 250° at 17 kt | −8 kt | -7 °C | 128 kt | 12 h 29 min | 9:29 pm MDT (03:29 UTC) |
| 11,500 ft | 260° at 26 kt | −14 kt | -10 °C | 134 kt | 11 h 55 min | 8:55 pm MDT (02:55 UTC) |
| 13,500 ft | 260° at 34 kt | −19 kt | -14 °C | 139 kt | 11 h 29 min | 8:29 pm MDT (02:29 UTC) |
| 15,500 ft | 260° at 41 kt | −23 kt | -17 °C | 143 kt | 11 h 10 min | 8:10 pm MDT (02:10 UTC) |
| 17,500 ft | 260° at 49 kt | −27 kt | -21 °C | 147 kt | 10 h 52 min | 7:52 pm MDT (01:52 UTC) |
| 18,000 ft FL180 | 260° at 50 kt | −28 kt | -22 °C | 148 kt | 10 h 47 min | 7:47 pm MDT (01:47 UTC) |
| 24,000 ft FL240 | 260° at 68 kt | −38 kt | -32 °C | 158 kt | 10 h 06 min | 7:06 pm MDT (01:06 UTC) |
| 30,000 ft FL300 | 270° at 70 kt | −48 kt | -43 °C | 168 kt | 9 h 30 min | 6:30 pm MDT (00:30 UTC) |
| 34,000 ft FL340 | 260° at 71 kt | −40 kt | -48 °C | 160 kt | 9 h 59 min | 6:59 pm MDT (00:59 UTC) |
| 39,000 ft FL390 | 260° at 72 kt | −41 kt | -51 °C | 161 kt | 9 h 55 min | 6:55 pm MDT (00:55 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| ANC | used from 0 nm out; 25 nm from the line | L/V | 150/7 -6° | 160/6 -12° | 160/6 -19° | 150/10 -32° | 220/15 -41° | 270/27 -47° | 260/32 -52° | 240/38 -50° |
| MDO | used from 100 nm out; 46 nm from the line | 210/11 | 210/12 -5° | 210/16 -12° | 220/19 -19° | 230/28 -29° | 230/46 -39° | 220/27 -47° | 230/45 -48° | 240/64 -47° |
| YAK | used from 250 nm out; 80 nm from the line | 250/9 | 250/14 -5° | 250/18 -11° | 250/21 -18° | 260/34 -29° | 260/56 -38° | 250/57 -46° | 250/69 -47° | 250/76 -48° |
| JNU | used from 399 nm out; 123 nm from the line | 210/8 | 250/17 -4° | 260/19 -10° | 270/24 -17° | 260/47 -25° | 260/67 -35° | 260/80 -43° | 260/88 -45° | 260/85 -48° |
| ANN | used from 549 nm out; 115 nm from the line | 200/15 | 290/7 1° | 250/16 -4° | 260/35 -7° | 260/62 -18° | 260/79 -29° | 270/83 -41° | 260/77 -48° | 260/75 -53° |
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 |
|---|---|---|---|---|---|---|---|
| ANC Anchorage, AK | departure | no report just now | 151 ft | ||||
| IEM Whittier, AK | 40 nm out, 6 nm south of the line | no report just now | 39 ft | ||||
| WSB Steamboat Bay, AK | 619 nm out, 6 nm west of the line | no report just now | 0 ft | ||||
| HYG Hydaburg, AK | 649 nm out, 1 nm northwest of the line | no report just now | 0 ft | ||||
| CYPW Powell River, | 1088 nm out, 22 nm southwest of the line | no report just now | 425 ft | ||||
| BLI Bellingham, WA | 1188 nm out, 6 nm southwest of the line, tower | no report just now | 171 ft | ||||
| PSC Pasco, WA | 1397 nm out, 4 nm north of the line, tower | no report just now | 410 ft | ||||
| LGD La Grande, OR | 1467 nm out, 2 nm east of the line | no report just now | 2,717 ft | ||||
| BOI Boise, ID | destination | no report just now | 2,871 ft |
The highest airport on this list sits at 2,871 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At BOI when you get there the forecast at the estimated arrival, 6:30 pm MDT (00:30 UTC)
BOI has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
- 6/8772 Anchorage, AK, Tuesday, October 13, 2026 through Tuesday, October 13, 2026 Local 4 nm from the route, at the departure end · security · starts tomorrow · ZAN
- 6/8889 Anchorage, AK, Tuesday, October 13, 2026 through Tuesday, October 13, 2026 Local on the route, at the departure end · a VIP movement · starts tomorrow · ZAN
Daylight
Sunset at ANC 6:54 pm AKDT (02:54 UTC), at BOI 7:05 pm MDT (01:05 UTC) (civil twilight ends 7:33 pm MDT (01:33 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: Ted Stevens Anchorage International, Boise Air Trml/Gowen Field.