Plan a flight · Mon 4:59 am EDT (08:59 UTC)

Concord Municipal to Washington Dulles International CON → IAD

371 nautical miles (427 statute miles) southwest on a straight line, true course 229°, about 245° magnetic at the departure end (variation 16W). At 120 knots that is 2 h 47 min at the quickest height in today's winds (4,500 ft, a 13-knot tailwind), arriving about 7:46 am EDT (11:46 UTC). Right now CON is low IFR, wind calm; IAD is marginal VFR, wind from the north-northwest (330°) at 11 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: 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 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 whole route.
AIRMET ZULU 1C: moderate icing from 12,000 ft to 24,000 ft. Over the first 29 nm of the route.
AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the first 303 nm of the route.
AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Near the route, at the departure end.
AIRMET TANGO 5W: moderate turbulence below 18,000 ft (due to mountain wave) up to 10,000 ft. Over the last 29 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 CON.

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

C560 at 13,000 ft, 13 nm southeast, 2:38 am EDT (06:38 UTC): moderate turbulence, overcast above 19,000 ft, heavy rain, remarks: during the descent. 264 nm along the route, 13 nm southeast of the line.
as filed, and in English
```
PHL UA /OV 20 NW PHL/TM 0638/FL130 /TP C560/SK OVC190/WX +RA/TB MOD/RM DURD
```
Report
a routine report filed through PHL
Where
20 northwest phl
Time
06:38 UTC
Height
at 13,000 ft
Aircraft
C560
Sky
overcast from 19,000 ft
Weather
heavy rain
Turbulence
moderate
Remarks
during the descent
B763 descending, 14 nm southeast, 2:21 am EDT (06:21 UTC): overcast above 40,000 ft. At the departure end, 14 nm southeast of the line.
as filed, and in English
```
MHT UA /OV KMHT/TM 0621/FLDURD/TP B763/SK OVC004
```
Report
a routine report filed through MHT
Where
over KMHT
Time
06:21 UTC
Height
during the descent
Aircraft
B763
Sky
overcast from 400 ft
B737 at 800 ft, 17 nm southeast, 3:30 am EDT (07:30 UTC): remarks: bases 800 ft. 332 nm along the route, 17 nm southeast of the line.
as filed, and in English
```
BWI UA /OV BWI/TM 0730/FL008/TP B737/RM BASES 008
```
Report
a routine report filed through BWI
Where
over BWI
Time
07:30 UTC
Height
at 800 ft
Aircraft
B737
Remarks
bases 800 ft

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 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 6 forecast points nearest it (BOS, BDL, JFK, AVP, ACY, RIC). 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	010° at 18 kt	−13 kt		133 kt	2 h 47 min	7:46 am EDT (11:46 UTC)
6,500 ft	360° at 17 kt	−11 kt	10 °C	131 kt	2 h 50 min	7:49 am EDT (11:49 UTC)
8,500 ft	350° at 16 kt	−8 kt	8 °C	128 kt	2 h 54 min	7:53 am EDT (11:53 UTC)
10,500 ft	330° at 16 kt	−4 kt	5 °C	124 kt	3 h	7:59 am EDT (11:59 UTC)
12,500 ft	320° at 18 kt	−1 kt	1 °C	121 kt	3 h 04 min	8:03 am EDT (12:03 UTC)
14,500 ft	310° at 19 kt	+2 kt	-3 °C	118 kt	3 h 09 min	8:08 am EDT (12:08 UTC)
16,500 ft	300° at 20 kt	+6 kt	-7 °C	114 kt	3 h 15 min	8:14 am EDT (12:14 UTC)
18,000 ft FL180	290° at 22 kt	+9 kt	-10 °C	111 kt	3 h 21 min	8:20 am EDT (12:20 UTC)
24,000 ft FL240	270° at 24 kt	+17 kt	-22 °C	103 kt	3 h 36 min	8:35 am EDT (12:35 UTC)
30,000 ft FL300	260° at 34 kt	+28 kt	-36 °C	92 kt	4 h 02 min	9:01 am EDT (13:01 UTC)
34,000 ft FL340	250° at 43 kt	+38 kt	-42 °C	82 kt	4 h 31 min	9:30 am EDT (13:30 UTC)
39,000 ft FL390	260° at 46 kt	+40 kt	-50 °C	80 kt	4 h 38 min	9:37 am EDT (13:37 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
BOS	used from 0 nm out; 53 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°
BDL	used from 49 nm out; 27 nm from the line	020/15	010/19 10°	340/10 7°	300/17 3°	280/23 -10°	250/35 -22°	250/44 -38°	250/55 -42°	250/57 -51°
JFK	used from 147 nm out; 46 nm from the line	020/25	290/9 12°	300/12 7°	320/14 3°	290/17 -10°	240/27 -21°	240/44 -36°	240/53 -41°	240/51 -50°
AVP	used from 195 nm out; 46 nm from the line	010/20	020/24 11°	360/19 8°	350/23 2°	320/24 -11°	330/25 -22°	330/27 -37°	310/28 -42°	290/30 -50°
ACY	used from 293 nm out; 96 nm from the line	350/12	340/12 11°	340/12 6°	340/13 2°	270/10 -10°	240/17 -23°	230/46 -33°	230/46 -40°	240/46 -49°
RIC	used from 342 nm out; 97 nm from the line	350/34	340/27 12°	340/36 8°	330/31 3°	310/32 -9°	320/34 -21°	300/37 -34°	290/37 -39°	290/42 -46°

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
CON Concord, NH	departure	low IFR Sky: a broken layer at 300 feet, overcast at 9,000 feet Weather: light rain	calm	10+ mi	300 ft	341 ft	4:51 am EDT (08:51 UTC)
ASH Nashua, NH	20 nm out, 19 nm southeast of the line, tower	IFR Sky: overcast at 600 feet Weather: light rain	calm	8 mi	600 ft	200 ft	08:56 UTC
BAF Westfield/Springfield, MA	78 nm out, 12 nm southeast of the line, tower	marginal VFR Sky: overcast at 1,400 feet	from the north (360°) at 9 knots	10+ mi	1,400 ft	270 ft	08:53 UTC
BDL Windsor Locks, CT	88 nm out, 22 nm southeast of the line, tower	IFR Sky: a broken layer at 600 feet, overcast at 1,000 feet	from the north (010°) at 12 knots	10+ mi	600 ft	173 ft	08:51 UTC
SWF New York, NY	156 nm out, 3 nm north of the line, tower	IFR Sky: overcast at 500 feet Weather: mist	from the northeast (040°) at 8 knots	5 mi	500 ft	490 ft	07:45 UTC
MMU Morristown, NJ	195 nm out, 19 nm southeast of the line, tower	marginal VFR Sky: scattered clouds at 1,300 feet, overcast at 1,900 feet	calm	10+ mi	1,900 ft	186 ft	08:55 UTC
ABE Allentown, PA	234 nm out, 7 nm northwest of the line, tower	marginal VFR Sky: overcast at 1,100 feet	from the north (350°) at 5 knots	10+ mi	1,100 ft	393 ft	08:51 UTC
LNS Lancaster, PA	283 nm out, 12 nm northwest of the line, tower	IFR Sky: overcast at 900 feet	from the north-northeast (020°) at 6 knots	10+ mi	900 ft	402 ft	08:53 UTC
MTN Baltimore, MD	322 nm out, 19 nm southeast of the line, tower	IFR Sky: a broken layer at 700 feet, overcast at 1,100 feet Weather: heavy drizzle	from the north (350°) at 6 knots	4 mi	700 ft	22 ft	08:35 UTC
BWI Baltimore, MD	332 nm out, 17 nm southeast of the line, tower	IFR Sky: scattered clouds at 700 feet, overcast at 1,100 feet Weather: light rain, mist	from the north-northwest (340°) at 9 knots, gusting to 16	1.75 mi	1,100 ft	143 ft	08:56 UTC
IAD Washington, DC	destination	marginal VFR Sky: a broken layer at 1,000 feet, a broken layer at 1,500 feet, overcast at 3,000 feet Weather: mist	from the north-northwest (330°) at 11 knots	6 mi	1,000 ft	312 ft	4:52 am EDT (08:52 UTC)

The highest airport on this list sits at 490 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At IAD when you get there the forecast at the estimated arrival, 7:46 am EDT (11:46 UTC)

Wind from the north-northwest at 12 knots, visibility 5 miles, light rain, mist, overcast at 600 feet IFR

The whole forecast for IAD

From Mon 2:00 am EDT (06:00 UTC): wind from the north-northwest at 12 knots, visibility 5 miles, light rain, mist, overcast at 600 feet
From Mon 8:00 am EDT (12:00 UTC): wind from the north-northwest at 10 knots, gusting to 18, visibility more than 6 miles, overcast at 1,000 feet
From Mon 12:00 pm EDT (16:00 UTC): wind from the north-northwest at 13 knots, gusting to 21, visibility more than 6 miles, scattered clouds at 1,500 feet, overcast at 2,500 feet
From Mon 2:00 pm EDT (18:00 UTC): wind from the north-northwest at 11 knots, gusting to 18, visibility more than 6 miles, scattered clouds at 2,500 feet, overcast at 3,500 feet
From Mon 5:00 pm EDT (21:00 UTC): wind from the northwest at 7 knots, visibility more than 6 miles, a broken layer at 3,500 feet
From Mon 8:00 pm EDT (00:00 UTC): wind from the west-northwest at 3 knots, visibility more than 6 miles, scattered clouds at 4,000 feet

The forecast for CON, the departure

From Mon 2:00 am EDT (06:00 UTC): wind from the north-northeast at 5 knots, visibility 6 miles, light rain, mist, a broken layer at 1,500 feet
From Mon 8:00 am EDT (12:00 UTC): wind calm, visibility 6 miles, mist, a broken layer at 1,500 feet
From Mon 11:00 am EDT (15:00 UTC): wind from the northwest at 5 knots, visibility more than 6 miles, a few clouds at 9,000 feet
From Tue 1:00 am EDT (05:00 UTC): wind calm, visibility 3 miles, mist, overcast at 1,500 feet

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

6/8800 Baltimore, MD, Saturday, October 17, 2026 through Sunday, October 18, 2026 UTC 13 nm from the route, 332 nm along the route · drones kept away from a public gathering · starts Saturday 17 October · ZDC
4/9383 WASHINGTON, DC., USA 3 nm from the route, at the destination end · security · ZDC
6/8600 Sterling, VA, Monday, October 12, 2026 through Monday, October 12, 2026 Local on the route, at the destination end · a VIP movement · today · ZDC

Daylight

Sunset at CON 6:08 pm EDT (22:08 UTC), at IAD 6:36 pm EDT (22:36 UTC) (civil twilight ends 7:02 pm EDT (23:02 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 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: Concord Municipal, Washington Dulles International.