Luis Munoz Marin International to General Edward Lawrence Logan International SJU → BOS
1,459 nautical miles (1,679 statute miles) north on a straight line, true course 351°, about 002° magnetic at the departure end (variation 11W). At 120 knots that is 11 h 13 min at the quickest height in today's winds (34,000 ft, a 10-knot tailwind), arriving about 4:57 pm EDT (20:57 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: 3,438 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 E29E: thunderstorms (a convective SIGMET) up to 35,000 ft, moving from the southwest at 20 knots, until 6:55 am AST (10:55 UTC). Over the route from 1229 to 1399 nm out.
as issued
WSUS31 KKCI 120855 MKCE WST 120855 CONVECTIVE SIGMET 29E VALID UNTIL 1055Z MA RI NY AND MA RI DE NJ NY MD CT CSTL WTRS FROM 60NE ACK-90ESE ACK-200SSE HTO-160SE SIE-HTO-60NE ACK AREA EMBD TS MOV FROM 24020KT. TOPS TO FL350. REF INTL SIGMET LIMA SERIES.
- AIRMET TANGO 6W: strong surface winds (30 knots or more) (due to sustained surface winds greater than 30 knots). Over the route from 1199 to 1229 nm out.
- AIRMET SIERRA 3E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist, fog). Over the last 250 nm of the route.
- AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 24,000 ft to 33,000 ft. Over the last 160 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 SJU.
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 08:00–15:00 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 (MIA, ILM, ORF, ACK, BOS). 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 | 310° at 13 kt | +10 kt | 110 kt | 13 h 16 min | 7:00 pm EDT (23:00 UTC) | |
| 5,500 ft | 300° at 15 kt | +9 kt | 111 kt | 13 h 09 min | 6:53 pm EDT (22:53 UTC) | |
| 7,500 ft | 290° at 17 kt | +8 kt | 12 °C | 112 kt | 13 h 02 min | 6:46 pm EDT (22:46 UTC) |
| 9,500 ft | 290° at 17 kt | +8 kt | 9 °C | 112 kt | 13 h 02 min | 6:46 pm EDT (22:46 UTC) |
| 11,500 ft | 290° at 17 kt | +8 kt | 6 °C | 112 kt | 13 h 02 min | 6:46 pm EDT (22:46 UTC) |
| 13,500 ft | 280° at 19 kt | +7 kt | 2 °C | 113 kt | 12 h 55 min | 6:39 pm EDT (22:39 UTC) |
| 15,500 ft | 280° at 22 kt | +6 kt | -2 °C | 114 kt | 12 h 48 min | 6:32 pm EDT (22:32 UTC) |
| 17,500 ft | 270° at 25 kt | +5 kt | -6 °C | 115 kt | 12 h 41 min | 6:25 pm EDT (22:25 UTC) |
| 18,000 ft FL180 | 270° at 26 kt | +5 kt | -7 °C | 115 kt | 12 h 41 min | 6:25 pm EDT (22:25 UTC) |
| 24,000 ft FL240 | 260° at 31 kt | 0 | -19 °C | 120 kt | 12 h 10 min | 5:54 pm EDT (21:54 UTC) |
| 30,000 ft FL300 | 250° at 47 kt | −8 kt | -33 °C | 128 kt | 11 h 24 min | 5:08 pm EDT (21:08 UTC) |
| 34,000 ft FL340 | 250° at 55 kt | −10 kt | -41 °C | 130 kt | 11 h 13 min | 4:57 pm EDT (20:57 UTC) |
| 39,000 ft FL390 | 250° at 45 kt | −4 kt | -51 °C | 124 kt | 11 h 46 min | 5:30 pm EDT (21:30 UTC) |
Based on data from the 12th at 06:00 UTC; valid on the 12th at 12:00 UTC for use 08:00 to 15:00 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| MIA | used from 0 nm out; 892 nm from the line | L/V | L/V 17° | L/V 13° | L/V 8° | 270/6 -6° | 250/9 -17° | 290/17 -32° | 280/25 -41° | 280/21 -52° |
| ILM | used from 500 nm out; 688 nm from the line | 300/18 | 300/22 13° | 300/21 8° | 290/28 4° | 280/38 -7° | 270/40 -18° | 250/49 -32° | 250/50 -40° | 270/33 -50° |
| ORF | used from 799 nm out; 481 nm from the line | 310/30 | 320/27 11° | 310/30 8° | 320/30 3° | 290/36 -8° | 270/40 -21° | 250/52 -32° | 250/50 -39° | 260/42 -48° |
| ACK | used from 1049 nm out; 312 nm from the line | 340/16 | 270/32 14° | 260/37 9° | 260/30 4° | 250/41 -9° | 250/49 -21° | 240/92 -34° | 240/107 -42° | 240/94 -52° |
| BOS | used from 1399 nm out; 35 nm from the line | 020/10 | 360/20 10° | 340/19 7° | 290/21 2° | 270/35 -9° | 260/42 -22° | 250/55 -38° | 240/75 -43° | 250/72 -51° |
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 |
|---|---|---|---|---|---|---|---|
| SJU San Juan, PR | departure | no report just now | 9 ft | ||||
| MVY Vineyard Haven, MA | 1399 nm out, 6 nm east of the line, tower | no report just now | 66 ft | ||||
| BOS Boston, MA | destination | no report just now | 19 ft |
The highest airport on this list sits at 66 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At BOS when you get there the forecast at the estimated arrival, 4:57 pm EDT (20:57 UTC)
BOS has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
- 6/4508 CEIBA, PR 24 nm from the route, at the departure end · security · ZSU
- 6/8802 Foxborough, MA, Saturday, October 17, 2026 through Sunday, October 18, 2026 UTC 14 nm from the route, at the destination end · drones kept away from a public gathering · starts Saturday 17 October · ZBW
Daylight
Sunset at SJU 6:03 pm AST (22:03 UTC), at BOS 6:07 pm EDT (22:07 UTC) (civil twilight ends 6:35 pm EDT (22:35 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: Luis Munoz Marin International, General Edward Lawrence Logan International.