(UA) United Airlines 597 On-Time Performance Rating

Date Range:

15-Jul-2025 to 15-Sep-2025

(BOS) Boston Logan International Airport

Boston, MA, US

(IAD) Washington Dulles International Airport

Dulles, VA, US

On-Time Performance Chart

(using rounded numbers)

On-Time

56%

Late

22%

Very Late

Excessive

17%

Cancelled

Diverted

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed

Total Delays ( > 1 min )

Codeshares

Average Delay (min.)

Standard Deviation

23.4

Min

Max

UA 597 On-Time Performance Details

Overall Rating

1.7 of 5

Average

Percentage On-Time 56%

Average Delay Time 31 min

FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 1.7 shows that this flight has on-time performance characteristics better than 32% of all other flights in the FlightStats database.

On-Time Performance Rating

0.2 of 5

Very Poor

Percentage On-Time 56%

This flight has an on-time performance of 56%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 4% of other flights.

Delay Performance

3.1 of 5

Average

Average Delay Time 31 min

This flight has an average delay of 31 minutes with a standard deviation of 23.4 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 62% of other flights.