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United Airlines

Is UA4459 delayed?

No delay reported — UA4459 is expected in Philadelphia at 14:08 on Sep 29, 12 min early.

Usually on time: arrived within 15 min of schedule on 38 of the last 45 flights.

Each route and date is shown separately. Confirm that both airports match your booking.

Estimated arrivalLast reported

12 min early

This update may be out of date. Check with your airline.

Update time unavailable

Departure

Dulles

IAD

Scheduled

Not available

Arrival

Philadelphia

PHL

Estimated

Scheduled 14:20

Sep 29

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
View this flight’s market

Market prices express trading expectations about a contract’s stated threshold. They do not confirm airline status. The linked market shows its terms and activity.

Arrived

25 min early

Official source · Updated

Departure

Ottawa

YOW

Scheduled

Sep 29

Arrival

Dulles

IAD

Actual

Scheduled 11:39

Sep 29

Times shown in airport local time

Service date: · Scheduled departure date (America/Toronto)

Flight details

Departure · UTC

Scheduled
Estimated
Not available
Actual
Not available

Arrival · UTC

Scheduled
Estimated
Not available
Actual

Also sold as AC3620, NH7140, AV2240

Route overview: Dulles → PhiladelphiaIADPHL
Dulles → Philadelphia

Recent arrivals

Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.

  • Ottawa → Dulles

    25 min early
  • Dulles → Philadelphia

    168 min late
  • Ottawa → Dulles

    23 min late
  • Dulles → Philadelphia

    59 min late
  • Ottawa → Dulles

    26 min early

Is UA4459 usually late?

Observation window: Aug 30, 2026 – Sep 29, 2026

Observed arrivals
45
On time
84%
of 45 arrivals
Late
16%
of 45 arrivals
Cancelled
2%
of 46 flights
Median arrival delay
17 min early
9 in 10 arrived within
22 min

On time means arriving no more than 15 minutes after the scheduled time; late means more than 15 minutes after. Cancelled and diverted flights are counted apart from arrivals. Results compare scheduled and actual arrival times. Cancelled or diverted flights are excluded. Some flights may be missing from the history.

How flight status works

At the airports today

Dulles (IAD) departures

Left more than 15 min late
14 of 109
Cancelled today
0

Philadelphia (PHL) departures

Left more than 15 min late
1 of 24
Cancelled today
0

All United Airlines flights

Flight history and details
UA4459 Recent arrival history
Service dateDepartureArrivalActualArrival delay (minutes)
Sep 29, 2026ArrivedOttawaDulles-25
Sep 28, 2026ArrivedDullesPhiladelphia168
Sep 28, 2026ArrivedOttawaDulles23
Sep 27, 2026ArrivedDullesPhiladelphia59
Sep 27, 2026ArrivedOttawaDulles-26
Sep 26, 2026ArrivedDullesPhiladelphia0
Sep 26, 2026ArrivedOttawaDulles-15
Sep 25, 2026ArrivedDullesPhiladelphia-13
Sep 25, 2026ArrivedOttawaDulles-19
Sep 24, 2026ArrivedDullesPhiladelphia-8
Sep 24, 2026ArrivedOttawaDulles42
Sep 23, 2026ArrivedDullesPhiladelphia-7
Sep 23, 2026ArrivedOttawaDulles-17
Sep 22, 2026ArrivedDullesPhiladelphia-8
Sep 22, 2026ArrivedOttawaDulles-8
Sep 21, 2026CancelledDullesPhiladelphiaNot availableNot available
Sep 21, 2026ArrivedOttawaDulles17
Sep 20, 2026ArrivedDullesPhiladelphia20
Sep 20, 2026ArrivedOttawaDulles-7
Sep 19, 2026ArrivedDullesPhiladelphia-22
Sep 19, 2026ArrivedOttawaDulles-20
Sep 18, 2026ArrivedDullesPhiladelphia-15
Sep 18, 2026ArrivedOttawaDulles-15
Sep 17, 2026ArrivedDullesPhiladelphia100
Sep 17, 2026ArrivedOttawaDulles-18
Sep 16, 2026ArrivedDullesPhiladelphia-25
Sep 16, 2026ArrivedOttawaDulles-22
Sep 15, 2026ArrivedDullesPhiladelphia-25
Sep 15, 2026ArrivedOttawaDulles-6
Sep 14, 2026ArrivedDullesPhiladelphia-19
Sep 14, 2026ArrivedOttawaDulles-7
Sep 13, 2026ArrivedDullesPhiladelphia-18
Sep 13, 2026ArrivedOttawaDulles-20
Sep 12, 2026ArrivedOttawaDulles-24
Sep 11, 2026ArrivedDullesPhiladelphia-13
Sep 11, 2026ArrivedOttawaDulles-27
Sep 10, 2026ArrivedDullesPhiladelphia-29
Sep 10, 2026ArrivedOttawaDulles-24
Sep 9, 2026ArrivedDullesPhiladelphia-19
Sep 9, 2026ArrivedOttawaDulles-30
Sep 8, 2026ArrivedDullesPhiladelphia-26
Sep 8, 2026ArrivedOttawaDulles-30
Sep 7, 2026ArrivedOttawaDulles-25
Sep 6, 2026ArrivedOttawaDulles-14
Sep 5, 2026ArrivedOttawaDulles-20
Sep 4, 2026ArrivedOttawaDulles4

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