Portsmouth International AT Pease to Philadelphia International PSM → PHL
277 nautical miles (318 statute miles) southwest on a straight line, true course 227°, about 243° magnetic at the departure end (variation 16W). At 120 knots that is 2 h 31 min at the quickest height in today's winds (4,500 ft, a 10-knot headwind), arriving about 4:32 am EDT (08:32 UTC), after sunset at the destination. 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: 4 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 whole route.
- AIRMET ZULU 1C: moderate icing up to 22,000 ft. Over the first 49 nm of the route.
- AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the whole route.
- AIRMET TANGO 2W: moderate turbulence below 18,000 ft up to 10,000 ft. Over the first 119 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 PSM.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- UAL330 at 35,000 ft, 23 nm northwest, 12:30 am EDT (04:30 UTC): moderate turbulence, wind 235° at 92 knots. 40 nm along the route, 23 nm northwest of the line.
as filed, and in English
ARP UAL330 4257N 07145W 0430 F350 235/092KT TB MOD TURB CONT MOD CHOP IC
- Report
- a routine report filed through ARP
- A319 at 23,000 ft, 20 nm southeast, 11:21 pm EDT (03:21 UTC): moderate turbulence. 247 nm along the route, 20 nm southeast of the line.
as filed, and in English
MJX UA /OV CYN345010/TM 0321/FL230/TP A319/TB MOD
- Report
- a routine report filed through MJX
- Where
- 10 nm north (345°) of CYN
- Time
- 03:21 UTC
- Height
- at 23,000 ft
- Aircraft
- A319
- Turbulence
- moderate
- B763 descending, 13 nm northwest, 1:55 am EDT (05:55 UTC): a routine report with nothing remarked on. 30 nm along the route, 13 nm northwest of the line.
as filed, and in English
MHT UA /OV RWY 35/TM 0555/FLDURD/TP B763/SK 004-005 FT
- Report
- a routine report filed through MHT
- Where
- runway 35
- Time
- 05:55 UTC
- Height
- during the descent
- Aircraft
- B763
- Sky
- from 400 ft to 500 ft ft
- CRJ7 descending, 13 nm northwest, 12:09 am EDT (04:09 UTC): a routine report with nothing remarked on. 30 nm along the route, 13 nm northwest of the line.
as filed, and in English
MHT UA /OV RWY 6/TM 0409/FLDURD/TP CRJ7/SK 006
- Report
- a routine report filed through MHT
- Where
- runway 6
- Time
- 04:09 UTC
- Height
- during the descent
- Aircraft
- CRJ7
- Sky
- at 600 ft
- CRJ9 descending, 13 nm northwest, 11:16 pm EDT (03:16 UTC): a routine report with nothing remarked on. 30 nm along the route, 13 nm northwest of the line.
as filed, and in English
MHT UA /OV RWY 6/TM 0316/FLDURD/TP CRJ9/SK 004
- Report
- a routine report filed through MHT
- Where
- runway 6
- Time
- 03:16 UTC
- Height
- during the descent
- Aircraft
- CRJ9
- Sky
- at 400 ft
- GA6C descending, 35 nm northwest, 12:32 am EDT (04:32 UTC): overcast above 1,000 ft, remarks: bases OVC010. 178 nm along the route, 35 nm northwest 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 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 (BOS, BDL, JFK, ACY). 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 | 220° at 11 kt | +10 kt | 110 kt | 2 h 31 min | 4:32 am EDT (08:32 UTC) | |
| 6,500 ft | 250° at 20 kt | +18 kt | 12 °C | 102 kt | 2 h 43 min | 4:44 am EDT (08:44 UTC) |
| 8,500 ft | 250° at 24 kt | +21 kt | 9 °C | 99 kt | 2 h 48 min | 4:49 am EDT (08:49 UTC) |
| 10,500 ft | 250° at 29 kt | +27 kt | 6 °C | 93 kt | 2 h 59 min | 5:00 am EDT (09:00 UTC) |
| 12,500 ft | 240° at 33 kt | +32 kt | 3 °C | 88 kt | 3 h 09 min | 5:10 am EDT (09:10 UTC) |
| 14,500 ft | 240° at 36 kt | +34 kt | -2 °C | 86 kt | 3 h 13 min | 5:14 am EDT (09:14 UTC) |
| 16,500 ft | 240° at 38 kt | +36 kt | -7 °C | 84 kt | 3 h 18 min | 5:19 am EDT (09:19 UTC) |
| 18,000 ft FL180 | 240° at 40 kt | +38 kt | -10 °C | 82 kt | 3 h 23 min | 5:24 am EDT (09:24 UTC) |
| 24,000 ft FL240 | 230° at 49 kt | +48 kt | -21 °C | 72 kt | 3 h 51 min | 5:52 am EDT (09:52 UTC) |
| 30,000 ft FL300 | 230° at 81 kt | +81 kt | -32 °C | 39 kt | 7 h 06 min | 9:07 am EDT (13:07 UTC) |
| 34,000 ft FL340 | 230° at 99 kt | +98 kt | -41 °C | 22 kt | 12 h 35 min | 2:36 pm EDT (18:36 UTC) |
| 39,000 ft FL390 | 230° at 86 kt | +86 kt | -52 °C | 34 kt | 8 h 09 min | 10:10 am EDT (14:10 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| BOS | used from 0 nm out; 28 nm from the line | 110/20 | 200/26 12° | 280/24 8° | 260/29 3° | 250/47 -10° | 230/59 -19° | 230/74 -33° | 240/95 -41° | 240/96 -53° |
| BDL | used from 49 nm out; 33 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° |
| JFK | used from 148 nm out; 28 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° |
| ACY | used from 247 nm out; 41 nm from the line | 220/19 | 220/18 14° | 210/36 9° | 210/35 5° | 220/36 -8° | 240/49 -21° | 220/90 -31° | 230/103 -40° | 230/81 -50° |
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 |
|---|---|---|---|---|---|---|---|
| PSM Portsmouth, NH | departure | no report just now | 100 ft | ||||
| LWM Lawrence, MA | 20 nm out, 8 nm south of the line, tower | no report just now | 147 ft | ||||
| ORH Worcester, MA | 69 nm out, 4 nm east of the line, tower | no report just now | 1,009 ft | ||||
| OXC Oxford, CT | 138 nm out, 2 nm southwest of the line, tower | no report just now | 730 ft | ||||
| HPN White Plains, NY | 178 nm out, 2 nm north of the line, tower | no report just now | 439 ft | ||||
| EWR Newark, NJ | 207 nm out, 0 nm northeast of the line, tower | no report just now | 17 ft | ||||
| TTN Trenton, NJ | 247 nm out, 3 nm north of the line, tower | no report just now | 212 ft | ||||
| PHL Philadelphia, PA | destination | no report just now | 35 ft |
The highest airport on this list sits at 1,009 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At PHL when you get there the forecast at the estimated arrival, 4:32 am EDT (08:32 UTC)
PHL has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
- 5/2811 NEW YORK, NY, Monday, October 20, 2025 through Tuesday, October 20, 2026 Local 2 nm from the route, 198 nm along the route · security · until 20 October · ZNY
Daylight
Sunset at PSM 6:05 pm EDT (22:05 UTC), at PHL 6:26 pm EDT (22:26 UTC) (civil twilight ends 6:53 pm EDT (22:53 UTC)). At 120 knots the arrival at PHL is before sunrise there (7:07 am EDT (11:07 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: Portsmouth International AT Pease, Philadelphia International.