United Airlines
Is UA4459 delayed?
Each route and date is shown separately. Confirm that both airports match your booking.
Service date: · Scheduled arrival date; departure time unavailable (America/New_York)
25 min early
Official source · Updated
Departure
Dulles
IAD
Scheduled
Not available
Arrival
Philadelphia
PHL
Actual
Sep 16
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Not available
- Estimated
- Not available
- Actual
- Not available
Arrival · UTC
- Scheduled
- Estimated
- Actual
Service date: · Scheduled departure date (UTC)
22 min early
Official source · Updated
Departure
Ottawa
YOW
Scheduled
Sep 16
Arrival
Dulles
IAD
Actual
Sep 16
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
- Not available
Arrival · UTC
- Scheduled
- Estimated
- Not available
- Actual
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 15 min early
IAD → PHL
- 15 min early
YOW → IAD
- 100 min late
IAD → PHL
- 18 min early
YOW → IAD
- 25 min early
IAD → PHL
Flight history and details
Aug 19, 2026 — Sep 18, 2026
- Observed arrivals
- 25
- Arrivals over 15 minutes late
- 1
- Observed cancellations
- 0
- Observed occurrences
- 25
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 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 |