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(UA) United Airlines 4238 On-Time Performance Rating

Date Range:

01-Dec-2025 to 31-Jan-2026

(IAD) Washington Dulles International Airport

Dulles, VA, US

(BTV) Patrick Leahy Burlington International Airport

Burlington, VT, US

On-Time Performance Chart

(using rounded numbers)
On-Time
11
55%
Late
2
10%
Very Late
2
10%
Excessive
3
15%
Cancelled
0
0%
Diverted
2
10%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
18
Total Delays ( > 1 min )
11
Codeshares
18
Average Delay (min.)
26.09090909090909
Standard Deviation
22.1
Min
0
Max
57

UA 4238 On-Time Performance Details

Overall Rating
2.1 of 5
Average
Percentage On-Time 61%
Average Delay Time 26.09090909090909 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.1 shows that this flight has on-time performance characteristics better than 41% of all other flights in the FlightStats database.
On-Time Performance Rating
0.6 of 5
Poor
Percentage On-Time 61%
This flight has an on-time performance of 61%. 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
3.6 of 5
Good
Average Delay Time 26.09090909090909 min
This flight has an average delay of 26.09090909090909 minutes with a standard deviation of 22.1 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 73% of other flights.

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