Plan a flight · Mon 1:34 am CDT (06:34 UTC)

Chicago O'Hare International to Nantucket Memorial ORD → ACK

801 nautical miles (922 statute miles) east on a straight line, true course 087°, about 090° magnetic at the departure end (variation 3W). At 120 knots that is 4 h 55 min at the quickest height in today's winds (34,000 ft, a 43-knot tailwind), arriving about 7:29 am EDT (11:29 UTC). Right now ORD is VFR, wind from the south (190°) at 4 knots; ACK is low IFR, wind from the northeast (040°) at 3 knots. 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: 60 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 SIERRA 3E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the last 761 nm of the route.
AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 386 to 593 nm out.
AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the route from 435 to 761 nm out.
AIRMET TANGO 2W: moderate turbulence below 18,000 ft up to 10,000 ft. Over the last 119 nm of the route.
AIRMET TANGO 4W: 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 last 40 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 ORD.

Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first

LJ45 at 10,000 ft, 48 nm south, 11:31 pm CDT (04:31 UTC): no turbulence, clear, remarks: ground fog at fwa FV10SM on final runway 14. 109 nm along the route, 48 nm south of the line.
as filed, and in English
```
FWA UA /OV OLK/TM 0431/FL100/TP LJ45/SK CLR/TB SMOOTH/RM GROUND FOG AT FWA. FV10SM ON FINAL RY 14
```
Report
a routine report filed through FWA
Where
over OLK
Time
04:31 UTC
Height
at 10,000 ft
Aircraft
LJ45
Sky
clear
Turbulence
smooth
Remarks
ground fog at fwa FV10SM on final runway 14
B738 at 1,700 ft, 29 nm south, 1:20 am CDT (06:20 UTC): overcast from 1,700 ft to 2,000 ft, remarks: during the descent. 178 nm along the route, 29 nm south of the line.
as filed, and in English
```
TOL UA /OV KTOL/TM 0620/FL017/TP B738/SK OVC017-TOP020/RM DURD
```
Report
a routine report filed through TOL
Where
over KTOL
Time
06:20 UTC
Height
at 1,700 ft
Aircraft
B738
Sky
overcast from 1,700 ft, tops 2,000 ft
Remarks
during the descent
B738 at 1,800 ft, 29 nm south, 12:18 am CDT (05:18 UTC): overcast from 1,800 ft to 2,700 ft, remarks: during the climb. 178 nm along the route, 29 nm south of the line.
as filed, and in English
```
TOL UA /OV KTOL/TM 0518/FL018/TP B738/SK OVC018-TOP027/RM DURC
```
Report
a routine report filed through TOL
Where
over KTOL
Time
05:18 UTC
Height
at 1,800 ft
Aircraft
B738
Sky
overcast from 1,800 ft, tops 2,700 ft
Remarks
during the climb
B738 at 1,300 ft, 29 nm south, 11:45 pm CDT (04:45 UTC): overcast from 1,300 ft to 3,000 ft, remarks: during the descent. 178 nm along the route, 29 nm south of the line.
as filed, and in English
```
TOL UA /OV KTOL/TM 0445/FL013/TP B738/SK OVC013-TOP030/RM DURD
```
Report
a routine report filed through TOL
Where
over KTOL
Time
04:45 UTC
Height
at 1,300 ft
Aircraft
B738
Sky
overcast from 1,300 ft, tops 3,000 ft
Remarks
during the descent
A333 descending, 10 nm northwest, 12:44 am CDT (05:44 UTC): a routine report with nothing remarked on. 208 nm along the route, 10 nm northwest of the line.
as filed, and in English
```
DTW UA /OV DTW/TM 0544/FLDURD/TP A333/SK TOPS 025
```
Report
a routine report filed through DTW
Where
over DTW
Time
05:44 UTC
Height
during the descent
Aircraft
A333
Sky
tops 2,500 ft
B739 descending, 10 nm northwest, 11:54 pm CDT (04:54 UTC): a routine report with nothing remarked on. 208 nm along the route, 10 nm northwest of the line.
as filed, and in English
```
DTW UA /OV DTW/TM 0454/FLDURD/TP B739/SK BASES 011
```
Report
a routine report filed through DTW
Where
over DTW
Time
04:54 UTC
Height
during the descent
Aircraft
B739
Sky
bases 1,100 ft
GA6C descending, 11 nm south, 11:32 pm CDT (04:32 UTC): overcast above 1,000 ft, remarks: bases OVC010. 613 nm along the route, 11 nm south of the line.
as filed, and in English
```
SWF UA /OV SWF 270005/TM 0432/FLDURD/TP GA6C/SK OVC010/RM BASES OVC010
```
Report
a routine report filed through SWF
Where
5 nm west (270°) of SWF
Time
04:32 UTC
Height
during the descent
Aircraft
GA6C
Sky
overcast from 1,000 ft
Remarks
bases OVC010

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 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 10 forecast points nearest it (JOT, MKG, FWA, CLE, BUF, PSB, AVP, JFK, BDL, ACK). 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	270° at 7 kt	−6 kt		126 kt	6 h 21 min	8:55 am EDT (12:55 UTC)
5,500 ft	310° at 12 kt	−9 kt	13 °C	129 kt	6 h 13 min	8:47 am EDT (12:47 UTC)
7,500 ft	310° at 14 kt	−12 kt	11 °C	132 kt	6 h 04 min	8:38 am EDT (12:38 UTC)
9,500 ft	300° at 15 kt	−13 kt	7 °C	133 kt	6 h 01 min	8:35 am EDT (12:35 UTC)
11,500 ft	290° at 15 kt	−14 kt	4 °C	134 kt	5 h 59 min	8:33 am EDT (12:33 UTC)
13,500 ft	290° at 17 kt	−16 kt	0 °C	136 kt	5 h 53 min	8:27 am EDT (12:27 UTC)
15,500 ft	290° at 19 kt	−18 kt	-4 °C	138 kt	5 h 48 min	8:22 am EDT (12:22 UTC)
17,500 ft	290° at 22 kt	−21 kt	-9 °C	141 kt	5 h 41 min	8:15 am EDT (12:15 UTC)
18,000 ft FL180	290° at 23 kt	−21 kt	-10 °C	141 kt	5 h 41 min	8:15 am EDT (12:15 UTC)
24,000 ft FL240	280° at 27 kt	−25 kt	-21 °C	145 kt	5 h 31 min	8:05 am EDT (12:05 UTC)
30,000 ft FL300	280° at 36 kt	−34 kt	-35 °C	154 kt	5 h 12 min	7:46 am EDT (11:46 UTC)
34,000 ft FL340	270° at 45 kt	−43 kt	-42 °C	163 kt	4 h 55 min	7:29 am EDT (11:29 UTC)
39,000 ft FL390	280° at 46 kt	−43 kt	-50 °C	163 kt	4 h 55 min	7:29 am EDT (11:29 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
JOT	used from 0 nm out; 47 nm from the line	250/23	270/22 15°	250/16 10°	240/9 4°	280/22 -7°	280/29 -19°	300/29 -34°	290/50 -43°	300/64 -52°
MKG	used from 49 nm out; 69 nm from the line	260/22	290/16 15°	300/11 10°	290/5 3°	300/26 -9°	300/32 -20°	320/48 -36°	320/61 -45°	310/74 -53°
FWA	used from 99 nm out; 64 nm from the line	300/17	320/20 16°	330/20 10°	340/15 3°	310/27 -8°	320/37 -20°	330/52 -36°	330/65 -43°	330/60 -50°
CLE	used from 198 nm out; 61 nm from the line	340/7	010/16 13°	350/18 8°	350/20 3°	340/31 -10°	340/46 -21°	340/54 -37°	330/62 -44°	340/65 -49°
BUF	used from 346 nm out; 69 nm from the line	320/10	010/16 10°	360/10 6°	340/13 2°	330/22 -11°	300/25 -23°	320/31 -38°	300/29 -44°	280/36 -50°
PSB	used from 445 nm out; 68 nm from the line		360/13 13°	330/14 7°	300/11 3°	290/12 -11°	240/23 -23°	270/25 -36°	250/34 -40°	250/45 -48°
AVP	used from 494 nm out; 38 nm from the line	150/5	350/13 12°	270/20 8°	260/17 4°	260/25 -11°	240/31 -22°	240/54 -35°	230/61 -41°	240/55 -49°
JFK	used from 593 nm out; 63 nm from the line	250/18	250/23 14°	240/33 9°	240/33 4°	240/38 -10°	240/45 -21°	230/86 -32°	230/102 -40°	230/84 -51°
BDL	used from 643 nm out; 26 nm from the line	120/24	290/23 12°	280/21 8°	250/36 3°	250/41 -11°	230/48 -21°	230/78 -32°	230/96 -41°	230/86 -52°
ACK	used from 742 nm out; 35 nm from the line	230/29	270/37 16°	270/38 10°	270/40 4°	240/46 -8°	230/52 -17°	240/74 -31°	240/83 -41°	240/91 -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
ORD Chicago, IL	departure	VFR Sky: a few clouds at 30,000 feet	from the south (190°) at 4 knots	10+ mi	none	680 ft	12:51 am CDT (05:51 UTC)
SBN South Bend, IN	69 nm out, 19 nm south of the line, tower	VFR	calm	8 mi	none	798 ft	06:09 UTC
AZO Kalamazoo, MI	109 nm out, 12 nm north of the line, tower	marginal VFR Weather: mist	from the south (170°) at 4 knots	5 mi	none	873 ft	05:53 UTC
DTW Detroit, MI	208 nm out, 10 nm northwest of the line, tower	marginal VFR Sky: overcast at 1,100 feet	from the southwest (230°) at 5 knots	10+ mi	1,100 ft	645 ft	05:53 UTC
LNN Willoughby, OH	287 nm out, 22 nm south of the line	marginal VFR Sky: scattered clouds at 700 feet, overcast at 2,500 feet	calm	10+ mi	2,500 ft	625 ft	06:15 UTC
ERI Erie, PA	346 nm out, 5 nm north of the line, tower	marginal VFR Sky: overcast at 3,000 feet	variable at 4 knots	10+ mi	3,000 ft	732 ft	00:51 UTC
BFD Bradford, PA	415 nm out, 9 nm south of the line	low IFR Sky: a broken layer at 300 feet, a broken layer at 800 feet, overcast at 1,800 feet	from the northwest (320°) at 4 knots	10+ mi	300 ft	2,143 ft	06:13 UTC
ELM Elmira/Corning, NY	494 nm out, 18 nm north of the line, tower	low IFR Sky: overcast at 200 feet	calm	10+ mi	200 ft	955 ft	05:53 UTC
POU Poughkeepsie, NY	623 nm out, 5 nm east of the line, tower	IFR Sky: overcast at 700 feet	from the north (010°) at 5 knots	10+ mi	700 ft	163 ft	05:53 UTC
OXC Oxford, CT	662 nm out, 6 nm south of the line, tower	marginal VFR Sky: scattered clouds at 600 feet, overcast at 2,200 feet	from the north-northeast (030°) at 13 knots, gusting to 21	10+ mi	2,200 ft	730 ft	06:10 UTC
MVY Vineyard Haven, MA	771 nm out, 6 nm northeast of the line, tower	low IFR Sky: overcast at 300 feet Weather: light rain	from the north-northeast (030°) at 11 knots	10+ mi	300 ft	66 ft	05:53 UTC
ACK Nantucket, MA	destination	low IFR Sky: overcast at 400 feet Weather: mist	from the northeast (040°) at 3 knots	3 mi	400 ft	46 ft	2:04 am EDT (06:04 UTC)

The highest airport on this list sits at 2,143 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At ACK when you get there the forecast at the estimated arrival, 7:29 am EDT (11:29 UTC)

Wind from the north-northeast at 13 knots, gusting to 18, visibility 2 miles, mist, overcast at 300 feet low IFR

The whole forecast for ACK

From Mon 2:00 am EDT (06:00 UTC): wind from the east at 16 knots, gusting to 23, visibility 3 miles, rain, mist, overcast at 300 feet
From Mon 5:00 am EDT (09:00 UTC): wind from the north-northeast at 13 knots, gusting to 18, visibility 2 miles, mist, overcast at 300 feet
From Mon 11:00 am EDT (15:00 UTC): wind from the north-northeast at 15 knots, gusting to 22, visibility more than 6 miles, a broken layer at 800 feet
From Mon 4:00 pm EDT (20:00 UTC): wind from the north at 13 knots, visibility more than 6 miles, scattered clouds at 5,000 feet
From Mon 8:00 pm EDT (00:00 UTC): wind from the north at 3 knots, visibility more than 6 miles, scattered clouds at 5,000 feet

The forecast for ORD, the departure

From Mon 1:00 am CDT (06:00 UTC): wind from the south at 5 knots, visibility more than 6 miles, scattered clouds at 25,000 feet
From Mon 12:00 pm CDT (17:00 UTC): wind from the south-southwest at 13 knots, gusting to 24, visibility more than 6 miles, a few clouds at 25,000 feet
From Mon 6:00 pm CDT (23:00 UTC): wind from the southwest at 12 knots, visibility more than 6 miles, a few clouds at 12,000 feet

Temporary flight restrictions on the line or within 25 nm of it

6/8829 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local 19 nm from the route, 326 nm along the route · a VIP movement · today · ZOB
6/8587 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local 19 nm from the route, 326 nm along the route · a VIP movement · today · ZOB
6/7153 North Sicuate, RI, Saturday, October 10, 2026 through Monday, October 12, 2026 UTC 21 nm from the route, 732 nm along the route · drones kept away from a public gathering · until 12 October · ZBW

Daylight

Sunset at ORD 6:15 pm CDT (23:15 UTC), at ACK 6:04 pm EDT (22:04 UTC) (civil twilight ends 6:32 pm EDT (22:32 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

Radar now, the upper Mississippi valley · loop National Weather Service

Radar now, the central Great Lakes · loop National Weather Service

Radar now, the Northeast · loop National Weather Service

Radar, the whole country · loop National Weather Service

Surface analysis now Weather Prediction Center

Forecast chart, 12 hours ahead Weather Prediction Center

Forecast chart, 24 hours ahead Weather Prediction Center

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: Chicago O'Hare International, Nantucket Memorial.