Trenton Mercer Airport to Washington Dulles International TTN → IAD
146 nautical miles (168 statute miles) southwest on a straight line, true course 238°, about 250° magnetic at the departure end (variation 12W). At 120 knots that is 1 h 28 min at the quickest height in today's winds (4,500 ft, a 20-knot headwind), arriving about 11:17 pm EDT (03:17 UTC), after sunset at the destination. Right now TTN is IFR, wind from the northeast (040°) at 8 knots; IAD is IFR, wind from the north (350°) at 6 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: 3 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 2E: thunderstorms (a convective SIGMET) up to 31,000 ft, moving from the southwest at 20 knots, until 10:55 pm EDT (02:55 UTC). Over the first 97 nm of the route.
as issued
WSUS31 KKCI 120055 MKCE WST 120055 CONVECTIVE SIGMET 2E VALID UNTIL 0255Z CT NY NJ PA DE MD AND NJ NY CT CSTL WTRS FROM 30NE SAX-30SSW HTO-30ESE EMI-50WSW HAR-30NE SAX AREA EMBD TS MOV FROM 22020KT. TOPS TO FL310.
- SIGMET 3E: thunderstorms (a convective SIGMET) up to 31,000 ft, moving from the west at 15 knots, until 10:55 pm EDT (02:55 UTC). Over the last 0 nm of the route.
as issued
WSUS31 KKCI 120055 MKCE WST 120055 CONVECTIVE SIGMET 3E VALID UNTIL 0255Z PA MD VA NC WV OH KY FROM 20NE APE-30SE JST-30SSE DCA-40SW ECG-70NNW HMV-20NE APE AREA TS MOV FROM 28015KT. TOPS TO FL310.
- 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 whole route.
- AIRMET TANGO 2W: moderate turbulence below 18,000 ft up to 13,000 ft. Over the first 0 nm of the route.
- AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the last 107 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 TTN.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- B38M at 6,000 ft, 39 nm northeast, 8:47 pm EDT (00:47 UTC): moderate turbulence. At the departure end, 39 nm northeast of the line.
as filed, and in English
EWR UA /OV 2 NW OF EWR/TM 0047/FL60/TP B38M/TB MODERATE
- Report
- a routine report filed through EWR
- Where
- 2 northwest of ewr
- Time
- 00:47 UTC
- Height
- at 6,000 ft
- Aircraft
- B38M
- Turbulence
- moderate
- CRJ7 at 15,000 ft, 30 nm east, 8:07 pm EDT (00:07 UTC): moderate chop turbulence. At the departure end, 30 nm east of the line.
as filed, and in English
BLM UA /OV COL/TM 0007/FL150/TP CRJ7/TB MOD CHOP
- Report
- a routine report filed through BLM
- Where
- over COL
- Time
- 00:07 UTC
- Height
- at 15,000 ft
- Aircraft
- CRJ7
- Turbulence
- moderate chop
- A21N at 18,000 ft, 16 nm northwest, 8:38 pm EDT (00:38 UTC): moderate clear-air turbulence. 29 nm along the route, 16 nm northwest of the line.
as filed, and in English
PTW UA /OV PTW/TM 0038/FL180/TP A21N/TB MOD CAT
- Report
- a routine report filed through PTW
- Where
- over PTW
- Time
- 00:38 UTC
- Height
- at 18,000 ft
- Aircraft
- A21N
- Turbulence
- moderate clear-air turbulence
- E75L at 20,000 ft, 11 nm southeast, 8:41 pm EDT (00:41 UTC): moderate turbulence above 20,000 ft. 49 nm along the route, 11 nm southeast of the line.
as filed, and in English
ILG UA /OV DQO/TM 0041/FL200/TP E75L/TB MOD 200
- Report
- a routine report filed through ILG
- Where
- over DQO
- Time
- 00:41 UTC
- Height
- at 20,000 ft
- Aircraft
- E75L
- Turbulence
- moderate at 20,000 ft
- E145 at 12,000 ft, 29 nm northwest, 8:43 pm EDT (00:43 UTC): moderate turbulence. 58 nm along the route, 29 nm northwest of the line.
as filed, and in English
LNS UA /OV LRP/TM 0043/FL120/TP E145/TB CONS MOD
- Report
- a routine report filed through LNS
- Where
- over LRP
- Time
- 00:43 UTC
- Height
- at 12,000 ft
- Aircraft
- E145
- Turbulence
- continuous moderate
- BCS3 at 19,000 ft, 36 nm southeast, 8:18 pm EDT (00:18 UTC): moderate turbulence above 17,000 ft, -9 °C. 58 nm along the route, 36 nm southeast of the line.
as filed, and in English
DOV UA /OV ENO/TM 0018/FL190/TP BCS3/TA M09/TB MOD 170
- Report
- a routine report filed through DOV
- Where
- over ENO
- Time
- 00:18 UTC
- Height
- at 19,000 ft
- Aircraft
- BCS3
- Temperature
- −9 °C
- Turbulence
- moderate at 17,000 ft
- A320 at 19,000 ft, 30 nm southeast, 9:34 pm EDT (01:34 UTC): light to moderate turbulence, remarks: flight level from 19,000 ft to 22,000 ft. At the departure end, 30 nm southeast of the line.
as filed, and in English
MJX UA /OV CYN045010/TM 0134/FL190/TP A320/TB LGT-MOD/RM FL 190-220
- Report
- a routine report filed through MJX
- Where
- 10 nm northeast (045°) of CYN
- Time
- 01:34 UTC
- Height
- at 19,000 ft
- Aircraft
- A320
- Turbulence
- light to moderate
- Remarks
- flight level from 19,000 ft to 22,000 ft
- E75S at 9,000 ft, 15 nm east, 9:22 pm EDT (01:22 UTC): light rime icing above 9,000 ft. At the departure end, 15 nm east of the line.
as filed, and in English
LGA UA /OV RBV/TM 0122/FL090/TP E75S/IC LGT RIME 090
- Report
- a routine report filed through LGA
- Where
- over RBV
- Time
- 01:22 UTC
- Height
- at 9,000 ft
- Aircraft
- E75S
- Icing
- light rime at 9,000 ft
- B38M at 1,000 ft, 39 nm northeast, 8:49 pm EDT (00:49 UTC): a broken layer above 1,000 ft. At the departure end, 39 nm northeast of the line.
as filed, and in English
EWR UA /OV FINAL RY04R/TM 0049/FL010/TP B38M/SK BKN010
- Report
- a routine report filed through EWR
- Where
- final RY04R
- Time
- 00:49 UTC
- Height
- at 1,000 ft
- Aircraft
- B38M
- Sky
- a broken layer from 1,000 ft
- B738 at 800 ft, 37 nm northeast, 7:50 pm EDT (23:50 UTC): a broken layer above 800 ft. At the departure end, 37 nm northeast of the line.
as filed, and in English
EWR UA /OV 3 S EWR/TM 2350/FL008/TP B738/SK 008BKN
- Report
- a routine report filed through EWR
- Where
- 3 south ewr
- Time
- 23:50 UTC
- Height
- at 800 ft
- Aircraft
- B738
- Sky
- 008BKN
- B738 at 4,500 ft, 39 nm northeast, 7:00 pm EDT (23:00 UTC): a routine report with nothing remarked on. At the departure end, 39 nm northeast of the line.
as filed, and in English
EWR UA /OV 20 SW OF EWR/TM 2300/FL045/TP B738/WV 20KT GAIN AT 045
- Report
- a routine report filed through EWR
- Where
- 20 southwest of ewr
- Time
- 23:00 UTC
- Height
- at 4,500 ft
- Aircraft
- B738
- Wind
- 20 knots gain at at 4,500 ft
- B763 at 2,000 ft, 46 nm east, 6:50 pm EDT (22:50 UTC): overcast above 2,000 ft, remarks: low-level wind shear a 15-knot loss of airspeed during the descent. At the departure end, 46 nm east of the line.
as filed, and in English
JFK UA /OV KJFK225008/TM 2250/FL020/TP B763/SK OVC020/RM LLWS +/-15KT DURD
- Report
- a routine report filed through JFK
- Where
- 8 nm southwest (225°) of KJFK
- Time
- 22:50 UTC
- Height
- at 2,000 ft
- Aircraft
- B763
- Sky
- overcast from 2,000 ft
- Remarks
- low-level wind shear a 15-knot loss of airspeed during the descent
- GLF5 at 600 ft, 7 nm east, 9:40 pm EDT (01:40 UTC): overcast above 600 ft, remarks: during the descent RY06 pne. 19 nm along the route, 7 nm east of the line.
as filed, and in English
PNE UA /OV PNE240001/TM 0140/FL006/TP GLF5/SK OVC006/RM DURD RY06 PNE
- Report
- a routine report filed through PNE
- Where
- 1 nm southwest (240°) of PNE
- Time
- 01:40 UTC
- Height
- at 600 ft
- Aircraft
- GLF5
- Sky
- overcast from 600 ft
- Remarks
- during the descent RY06 pne
- B38M at 2,300 ft, 48 nm southeast, 9:11 pm EDT (01:11 UTC): remarks: tops 2,300 ft during the descent. 19 nm along the route, 48 nm southeast of the line.
as filed, and in English
ACY UA /OV ACY/TM 0111/FL023/TP B38M/SK TOPS 023/RM TOPS 023 DURD
- Report
- a routine report filed through ACY
- Where
- over ACY
- Time
- 01:11 UTC
- Height
- at 2,300 ft
- Aircraft
- B38M
- Sky
- tops 2,300 ft
- Remarks
- tops 2,300 ft during the descent
16 more routine reports are on the map.
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 2 forecast points nearest it (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 | 210° at 22 kt | +20 kt | 100 kt | 1 h 28 min | 11:17 pm EDT (03:17 UTC) | |
| 6,500 ft | 220° at 25 kt | +24 kt | 14 °C | 96 kt | 1 h 31 min | 11:20 pm EDT (03:20 UTC) |
| 8,500 ft | 220° at 29 kt | +28 kt | 12 °C | 92 kt | 1 h 35 min | 11:24 pm EDT (03:24 UTC) |
| 10,500 ft | 220° at 30 kt | +29 kt | 8 °C | 91 kt | 1 h 36 min | 11:25 pm EDT (03:25 UTC) |
| 12,500 ft | 220° at 31 kt | +30 kt | 5 °C | 90 kt | 1 h 37 min | 11:26 pm EDT (03:26 UTC) |
| 14,500 ft | 230° at 34 kt | +34 kt | 1 °C | 86 kt | 1 h 42 min | 11:31 pm EDT (03:31 UTC) |
| 16,500 ft | 230° at 38 kt | +38 kt | -4 °C | 82 kt | 1 h 47 min | 11:36 pm EDT (03:36 UTC) |
| 18,000 ft FL180 | 230° at 41 kt | +40 kt | -7 °C | 80 kt | 1 h 50 min | 11:39 pm EDT (03:39 UTC) |
| 24,000 ft FL240 | 230° at 57 kt | +56 kt | -17 °C | 64 kt | 2 h 17 min | 12:06 am EDT (04:06 UTC) |
| 30,000 ft FL300 | 230° at 75 kt | +74 kt | -30 °C | 46 kt | 3 h 10 min | 12:59 am EDT (04:59 UTC) |
| 34,000 ft FL340 | 230° at 82 kt | +81 kt | -41 °C | 39 kt | 3 h 45 min | 1:34 am EDT (05:34 UTC) |
| 39,000 ft FL390 | 230° at 84 kt | +83 kt | -53 °C | 37 kt | 3 h 57 min | 1:46 am EDT (05:46 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 | 3,000 | 6,000 | 9,000 | 12,000 | 18,000 | 24,000 | 30,000 | 34,000 | 39,000 |
|---|---|---|---|---|---|---|---|---|---|---|
| ACY | used from 0 nm out; 48 nm from the line | 230/15 | 230/22 15° | 230/31 11° | 230/27 6° | 230/40 -7° | 230/51 -17° | 230/71 -31° | 230/81 -41° | 230/86 -53° |
| RIC | used from 97 nm out; 101 nm from the line | 190/33 | 200/29 14° | 210/31 12° | 210/38 6° | 230/42 -7° | 230/68 -16° | 220/84 -29° | 220/86 -40° | 220/81 -52° |
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 |
|---|---|---|---|---|---|---|---|
| TTN Trenton, NJ | departure | IFR Sky: overcast at 800 feet Weather: light rain, mist | from the northeast (040°) at 8 knots | 5 mi | 800 ft | 212 ft | 8:53 pm EDT (00:53 UTC) |
| PHL Philadelphia, PA | 29 nm out, 10 nm southeast of the line, tower | IFR Sky: a broken layer at 600 feet, overcast at 900 feet Weather: mist | from the northeast (040°) at 9 knots, gusting to 17 | 6 mi | 600 ft | 35 ft | 01:11 UTC |
| MTN Baltimore, MD | 97 nm out, 9 nm southeast of the line, tower | IFR Sky: overcast at 500 feet | calm | 4 mi | 500 ft | 22 ft | 00:45 UTC |
| BWI Baltimore, MD | 107 nm out, 9 nm southeast of the line, tower | low IFR Sky: overcast at 400 feet Weather: light drizzle, mist | from the northeast (050°) at 7 knots | 3 mi | 400 ft | 143 ft | 01:20 UTC |
| IAD Washington, DC | destination | IFR Sky: overcast at 600 feet Weather: light rain | from the north (350°) at 6 knots | 8 mi | 600 ft | 312 ft | 8:52 pm EDT (00:52 UTC) |
The highest airport on this list sits at 312 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, 11:17 pm EDT (03:17 UTC)
Wind from the north-northwest at 6 knots, visibility 2 miles, rain showers, mist, overcast at 400 feet low IFR
The whole forecast for IAD
- From Sun 8:00 pm EDT (00:00 UTC): wind from the north at 7 knots, visibility 4 miles, light rain showers, mist, overcast at 700 feet
- From Sun 10:00 pm EDT (02:00 UTC): wind from the north-northwest at 6 knots, visibility 2 miles, rain showers, mist, overcast at 400 feet
- From Mon 4:00 am EDT (08:00 UTC): wind from the north-northwest at 10 knots, gusting to 18, visibility 4 miles, light rain showers, mist, overcast at 600 feet
- From Mon 6:00 am EDT (10:00 UTC): wind from the north-northwest at 11 knots, gusting to 19, visibility more than 6 miles, overcast at 1,400 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, overcast at 2,100 feet
- From Mon 2:00 pm EDT (18:00 UTC): wind from the north-northwest at 10 knots, gusting to 17, visibility more than 6 miles, a broken layer at 4,000 feet
- From Mon 7:00 pm EDT (23:00 UTC): wind from the northwest at 6 knots, visibility more than 6 miles, scattered clouds at 25,000 feet
The forecast for TTN, the departure
- From Sun 9:00 pm EDT (01:00 UTC): wind from the northeast at 8 knots, visibility 3 miles, light rain, mist, overcast at 800 feet
- From Sun 11:00 pm EDT (03:00 UTC): wind from the north at 8 knots, visibility 5 miles, light rain, mist, overcast at 500 feet
- From Mon 10:00 am EDT (14:00 UTC): wind from the north at 10 knots, visibility 5 miles, mist, overcast at 800 feet
- From Mon 12:00 pm EDT (16:00 UTC): wind from the north at 10 knots, visibility more than 6 miles, overcast at 2,500 feet
- From Mon 2:00 pm EDT (18:00 UTC): wind from the northwest at 10 knots, visibility more than 6 miles, overcast at 5,000 feet
- From Mon 6:00 pm EDT (22:00 UTC): wind from the west-northwest at 8 knots, visibility more than 6 miles, scattered clouds at 25,000 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 6 nm from the route, 107 nm along the route · drones kept away from a public gathering · starts Saturday 17 October · ZDC
- 4/9383 WASHINGTON, DC., USA 1 nm from the route, 136 nm along the route · security · ZDC
- 6/8600 Sterling, VA, Monday, October 12, 2026 through Monday, October 12, 2026 Local on the route, 136 nm along the route · a VIP movement · today · ZDC
Daylight
Sunset at TTN 6:24 pm EDT (22:24 UTC), at IAD 6:36 pm EDT (22:36 UTC) (civil twilight ends 7:02 pm EDT (23:02 UTC)). At 120 knots the arrival at IAD is before sunrise there (7:16 am EDT (11:16 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: Trenton Mercer Airport, Washington Dulles International.