(UA) United Airlines 4337 On-Time Performance Rating

Date Range:

01-Sep-2026 to 31-Oct-2026

(PHL) Philadelphia International Airport

Philadelphia, PA, US

(IAD) Washington Dulles International Airport

Dulles, VA, US

On-Time Performance Chart

(using rounded numbers)

On-Time

Late

100%

Very Late

Excessive

Cancelled

Diverted

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed

Total Delays ( > 1 min )

Codeshares

Average Delay (min.)

Standard Deviation

Min

Max

UA 4337 On-Time Performance Details

Overall Rating

1.6 of 5

Average

Percentage On-Time 0%

Average Delay Time 19 min

FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 1.6 shows that this flight has on-time performance characteristics better than 31% of all other flights in the FlightStats database.

On-Time Performance Rating

0.1 of 5

Very Poor

Percentage On-Time 0%

This flight has an on-time performance of 0%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 3% of other flights.

Delay Performance

3.1 of 5

Average

Average Delay Time 19 min

This flight has an average delay of 19 minutes with a standard deviation of 0 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 62% of other flights.