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(UA) United Airlines 3997 On-Time Performance Rating

Date Range:

01-May-2026 to 30-Jun-2026

(IAD) Washington Dulles International Airport

Dulles, VA, US

(IND) Indianapolis International Airport

Indianapolis, IN, US

On-Time Performance Chart

(using rounded numbers)
On-Time
26
65%
Late
6
15%
Very Late
2
5%
Excessive
5
13%
Cancelled
0
0%
Diverted
1
3%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
39
Total Delays ( > 1 min )
28
Codeshares
39
Average Delay (min.)
27.428571428571427
Standard Deviation
33.5
Min
0
Max
121

UA 3997 On-Time Performance Details

Overall Rating
2.3 of 5
Average
Percentage On-Time 67%
Average Delay Time 27.428571428571427 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.3 shows that this flight has on-time performance characteristics better than 44% of all other flights in the FlightStats database.
On-Time Performance Rating
0.6 of 5
Poor
Percentage On-Time 67%
This flight has an on-time performance of 67%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 12% of other flights.
Delay Performance
3.9 of 5
Good
Average Delay Time 27.428571428571427 min
This flight has an average delay of 27.428571428571427 minutes with a standard deviation of 33.5 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 79% of other flights.

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