Daniel K Inouye International to Guam International HNL → GUM
3,299 nautical miles (3,796 statute miles) west on a straight line, true course 272°, about 261° magnetic at the departure end (variation 11E). At 120 knots that is 26 h 36 min at the quickest height in today's winds (4,500 ft, a 4-knot tailwind), arriving about 12:33 pm ChST (02:33 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: 1,033 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
No SIGMET or AIRMET covers any part of this route right now.
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 HNL.
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 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 4 forecast points nearest it (HNL, LIH, OGG, LIH). 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 | 060° at 4 kt | −4 kt | 124 kt | 26 h 36 min | 12:33 pm ChST (02:33 UTC) | |
| 6,500 ft | 030° at 5 kt | −3 kt | 16 °C | 123 kt | 26 h 49 min | 12:46 pm ChST (02:46 UTC) |
| 8,500 ft | 010° at 5 kt | −2 kt | 12 °C | 122 kt | 27 h 02 min | 12:59 pm ChST (02:59 UTC) |
| 10,500 ft | 320° at 6 kt | +3 kt | 8 °C | 117 kt | 28 h 12 min | 2:09 pm ChST (04:09 UTC) |
| 12,500 ft | 290° at 12 kt | +10 kt | 6 °C | 110 kt | 29 h 59 min | 3:56 pm ChST (05:56 UTC) |
| 14,500 ft | 270° at 18 kt | +17 kt | 4 °C | 103 kt | 32 h 02 min | 5:59 pm ChST (07:59 UTC) |
| 16,500 ft | 260° at 15 kt | +15 kt | 0 °C | 105 kt | 31 h 25 min | 5:22 pm ChST (07:22 UTC) |
| 18,000 ft FL180 | 230° at 13 kt | +11 kt | -3 °C | 109 kt | 30 h 16 min | 4:13 pm ChST (06:13 UTC) |
| 24,000 ft FL240 | 210° at 17 kt | +10 kt | -16 °C | 110 kt | 29 h 59 min | 3:56 pm ChST (05:56 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 | 1,000 | 1,500 | 2,000 | 3,000 | 6,000 | 9,000 | 12,000 | 15,000 | 18,000 | 24,000 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| HNL | used from 0 nm out; 25 nm from the line | 080/8 | 080/8 | 080/8 | 080/7 | 030/10 18° | 010/19 12° | 340/20 7° | 330/20 4° | 030/5 -2° | 150/8 -15° |
| LIH | used from 50 nm out; 38 nm from the line | 090/9 | 100/10 | 100/10 | 090/5 | 030/5 17° | 010/5 11° | 290/10 6° | 270/20 3° | 230/14 -3° | 210/18 -16° |
| OGG | used from 1200 nm out; 7967 nm from the line | 080/11 | 090/11 | 090/11 | 110/9 | 090/11 16° | 020/19 11° | 360/35 7° | 360/30 5° | 050/12 -1° | 080/15 -15° |
| LIH | used from 1250 nm out; 1195 nm from the line | 090/9 | 100/10 | 100/10 | 090/5 | 030/5 17° | 010/5 11° | 290/10 6° | 270/20 3° | 230/14 -3° | 210/18 -16° |
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 |
|---|---|---|---|---|---|---|---|
| HNL Honolulu, HI | departure | no report just now | 13 ft | ||||
| HDH Mokuleia, HI | 20 nm out, 16 nm north of the line | no report just now | 14 ft | ||||
| GUM Tamuning, GU | destination | no report just now | 305 ft |
The highest airport on this list sits at 305 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At GUM when you get there the forecast at the estimated arrival, 12:33 pm ChST (02:33 UTC)
GUM has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
- 6/4143 ANDERSEN AFB, GU, Monday, March 9, 2026 through Tuesday, March 9, 2027 Local 3 nm from the route, at the destination end · security · until 9 March · ZUA
- 6/2520 S. FINEGAYAN, GU 4 nm from the route, at the destination end · security · ZUA
Daylight
Sunset at HNL 6:09 pm HST (04:09 UTC), at GUM 6:03 pm ChST (08:03 UTC) (civil twilight ends 6:25 pm ChST (08:25 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: Daniel K Inouye International, Guam International.