United Airlines
Is UA4459 delayed?
No delay reported — UA4459 is expected in Philadelphia at 14:20 on Sep 27, as scheduled. Over its last 40 recorded arrivals, 4 landed more than 15 min late.
Each route and date is shown separately. Confirm that both airports match your booking.
On time
This update may be out of date. Check with your airline.
Update time unavailable
Departure
Dulles
IAD
Scheduled
Not available
Arrival
Philadelphia
PHL
Estimated
Sep 27
Times shown in airport local time
Service date: · Scheduled arrival date; departure time unavailable (America/New_York)
Flight details
Departure · UTC
- Scheduled
- Not available
- Estimated
- Not available
- Actual
- Not available
Arrival · UTC
- Scheduled
- Estimated
- Actual
- Not available
No live update yet
Showing the published schedule until live times are reported.
Update time unavailable
Departure
Ottawa
YOW
Scheduled
Sep 27
Arrival
Dulles
IAD
Scheduled
Sep 27
Times shown in airport local time
Service date: · Scheduled departure date (UTC)
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
- Not available
Arrival · UTC
- Scheduled
- Estimated
- Not available
- Actual
- Not available
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- On time
IAD → PHL
- 15 min early
YOW → IAD
- 13 min early
IAD → PHL
- 19 min early
YOW → IAD
- 8 min early
IAD → PHL
Flight history and details
Aug 28, 2026 — Sep 27, 2026
- Observed arrivals
- 40
- Arrivals over 15 minutes late
- 4
- Observed cancellations
- 1
- Observed occurrences
- 41
Results compare scheduled and actual arrival times. Cancelled or diverted flights are excluded. Some flights may be missing from the history.
| Service date | Departure | Arrival | Actual | Arrival delay (minutes) |
|---|---|---|---|---|
| Sep 26, 2026Arrived | Dulles | Philadelphia | 0 | |
| Sep 26, 2026Arrived | Ottawa | Dulles | -15 | |
| Sep 25, 2026Arrived | Dulles | Philadelphia | -13 | |
| Sep 25, 2026Arrived | Ottawa | Dulles | -19 | |
| Sep 24, 2026Arrived | Dulles | Philadelphia | -8 | |
| Sep 24, 2026Arrived | Ottawa | Dulles | 42 | |
| Sep 23, 2026Arrived | Dulles | Philadelphia | -7 | |
| Sep 23, 2026Arrived | Ottawa | Dulles | -17 | |
| Sep 22, 2026Arrived | Dulles | Philadelphia | -8 | |
| Sep 22, 2026Arrived | Ottawa | Dulles | -8 | |
| Sep 21, 2026Cancelled | Dulles | Philadelphia | Not available | Not available |
| Sep 21, 2026Arrived | Ottawa | Dulles | 17 | |
| Sep 20, 2026Arrived | Dulles | Philadelphia | 20 | |
| Sep 20, 2026Arrived | Ottawa | Dulles | -7 | |
| Sep 19, 2026Arrived | Dulles | Philadelphia | -22 | |
| Sep 19, 2026Arrived | Ottawa | Dulles | -20 | |
| Sep 18, 2026Arrived | Dulles | Philadelphia | -15 | |
| Sep 18, 2026Arrived | Ottawa | Dulles | -15 | |
| Sep 17, 2026Arrived | Dulles | Philadelphia | 100 | |
| Sep 17, 2026Arrived | Ottawa | Dulles | -18 | |
| Sep 16, 2026Arrived | Dulles | Philadelphia | -25 | |
| Sep 16, 2026Arrived | Ottawa | Dulles | -22 | |
| Sep 15, 2026Arrived | Dulles | Philadelphia | -25 | |
| Sep 15, 2026Arrived | Ottawa | Dulles | -6 | |
| Sep 14, 2026Arrived | Dulles | Philadelphia | -19 | |
| Sep 14, 2026Arrived | Ottawa | Dulles | -7 | |
| Sep 13, 2026Arrived | Dulles | Philadelphia | -18 | |
| Sep 13, 2026Arrived | Ottawa | Dulles | -20 | |
| Sep 12, 2026Arrived | Ottawa | Dulles | -24 | |
| Sep 11, 2026Arrived | Dulles | Philadelphia | -13 | |
| Sep 11, 2026Arrived | Ottawa | Dulles | -27 | |
| Sep 10, 2026Arrived | Dulles | Philadelphia | -29 | |
| Sep 10, 2026Arrived | Ottawa | Dulles | -24 | |
| Sep 9, 2026Arrived | Dulles | Philadelphia | -19 | |
| Sep 9, 2026Arrived | Ottawa | Dulles | -30 | |
| Sep 8, 2026Arrived | Dulles | Philadelphia | -26 | |
| Sep 8, 2026Arrived | Ottawa | Dulles | -30 | |
| Sep 7, 2026Arrived | Ottawa | Dulles | -25 | |
| Sep 6, 2026Arrived | Ottawa | Dulles | -14 | |
| Sep 5, 2026Arrived | Ottawa | Dulles | -20 | |
| Sep 4, 2026Arrived | Ottawa | Dulles | 4 |