UA4587United Airlines · PHL → IAD
live · 20m ago
Route confirmed United Airlines

UA4587 PhiladelphiaPHL · 23:45 WashingtonIAD · 21:10

UA4587 by United Airlines flies from Philadelphia (PHL) to Washington (IAD).

Right nowNext departure tomorrow Operates daily
08:50

scheduled from PHL

⚖ UA4587 typically leaves +146 and lands +92. The air wins minutes back.
Typical gate push+146 minmedian posted departure
Typical arrival+92 minmedian over 8 operations
Wins back in air~54 minmedian gate push vs arrival · how planes make up time →

Where the minutes go

last 7 operations · gate push → arrival
0+57+115+172 min
08-17
+149 gate · +116 arrival
08-10
+172 gate · +116 arrival
08-09
+9 gate · −39 arrival
08-08
+19 gate · −34 arrival
08-06
+147 gate · +92 arrival
08-05
+146 gate · +94 arrival
08-04
+15 gate · −37 arrival

The bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.

The last 30 days

arrival outcome per operation

median arrival +92 min · 0 cancelled · 8 operations tracked

The route today

live boards
PHLPhiladelphiaOn-time likelyPHL delay board →
IADWashingtonOn-time likelyIAD delay board →
PHL→IADevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Weather-conditioned outlook for this flight right now

Measured, 90-day sample
50%Chance of 15+ min delay
1.3%Chance of cancellation
+27 minAvg hub delay right now

Driven mainly by PHL (Philadelphia), currently flying MVFR (marginal visual). For this route and airline, under conditions like today's, over the last 90 days.

Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →

When it flies

scheduled departures
061422
M
T
W
T
F
S
S

Each mark is a scheduled departure at its origin-local time. Today is highlighted.

Other Philadelphia to Washington flights today

same route · United Airlines
UA3688departs 06:10
UA3693departs 06:10
UA6235departs 10:30
UA3593departs 15:10
UA3288departs 19:05
UA4072departs 19:05

If UA4587 is cancelled, these are the other United Airlines nonstop flights from Philadelphia to Washington on the same day, with scheduled departure times in PHL local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →

How UA4587 actually runs

Pro Flight Search has tracked every published board update for UA4587 across the PHL and IAD boards: schedule changes, gate pushes and actual clocks. Usually lands ~95 min late. Based on 8 confirmed landings · 4/8 within 15 min of schedule. Pushes back late but makes up time in the air.

The verdict above is that record speaking, so it reflects how UA4587 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Technical record

How this operation is measured

board clocksaircraft

Board log

scheduled → actual, per operation
08-17PHL 23:45 02:14 (+149)IAD 21:10 23:06 (+116)
08-10PHL 19:45 22:37 (+172)IAD 21:10 23:06 (+116)
08-09PHL 19:45 19:54 (+9)IAD 21:10 20:31 (−39)
08-08PHL 19:45 20:04 (+19)IAD 21:10 20:36 (−34)
08-06PHL 19:45 22:12 (+147)IAD 21:10 22:42 (+92)
08-05PHL 19:45 22:11 (+146)IAD 21:10 22:44 (+94)
08-04PHL 19:45 20:00 (+15)IAD 21:10 20:33 (−37)
08-03PHL 23:45 23:57 (+12)IAD 21:10 20:47 (−23)

Aircraft

Recent tails: N506GJ, N521GJ, N540GJ, N545GJ.

Board clocks recorded as PHL and IAD published them.

Planning around UA4587? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search — UA4587 Philadelphia to Washington on-time performance, measured from the PHL and IAD airport boards.

Canonical URL
https://proflightsearch.com/flight/UA4587
How we measure this →