(UA) United Airlines 4398 On-Time Performance Rating

Date Range:

01-Jan-2026 to 28-Feb-2026

(DTW) Detroit Metropolitan Wayne County Airport

Detroit, MI, US

(IAD) Washington Dulles International Airport

Dulles, VA, US

On-Time Performance Chart

(using rounded numbers)

On-Time

40%

Late

Very Late

Excessive

60%

Cancelled

Diverted

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed

Total Delays ( > 1 min )

Codeshares

Average Delay (min.)

234.25

Standard Deviation

351.4

Min

Max

759

UA 4398 On-Time Performance Details

Overall Rating

0.1 of 5

Very Poor

Percentage On-Time 40%

Average Delay Time 234.25 min

FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 0.1 shows that this flight has on-time performance characteristics better than 0% of all other flights in the FlightStats database.

On-Time Performance Rating

0.1 of 5

Very Poor

Percentage On-Time 40%

This flight has an on-time performance of 40%. 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

0.0 of 5

Very Poor

Average Delay Time 234.25 min

This flight has an average delay of 234.25 minutes with a standard deviation of 351.4 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 0% of other flights.