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(UA) United Airlines 4188 On-Time Performance Rating

Date Range:

15-May-2026 to 15-Jul-2026

(IAD) Washington Dulles International Airport

Dulles, VA, US

(DAY) James M Cox Dayton International Airport

Dayton, OH, US

On-Time Performance Chart

(using rounded numbers)
On-Time
15
68%
Late
3
14%
Very Late
0
0%
Excessive
3
14%
Cancelled
0
0%
Diverted
1
5%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
21
Total Delays ( > 1 min )
6
Codeshares
21
Average Delay (min.)
62.166666666666664
Standard Deviation
47
Min
0
Max
122

UA 4188 On-Time Performance Details

Overall Rating
1.2 of 5
Poor
Percentage On-Time 71%
Average Delay Time 62.166666666666664 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 1.2 shows that this flight has on-time performance characteristics better than 23% of all other flights in the FlightStats database.
On-Time Performance Rating
1.7 of 5
Average
Percentage On-Time 71%
This flight has an on-time performance of 71%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 34% of other flights.
Delay Performance
0.7 of 5
Poor
Average Delay Time 62.166666666666664 min
This flight has an average delay of 62.166666666666664 minutes with a standard deviation of 47 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 14% of other flights.

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