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(UA) United Airlines 4871 On-Time Performance Rating

Date Range:

15-May-2026 to 15-Jul-2026

(IAD) Washington Dulles International Airport

Dulles, VA, US

(ROC) Frederick Douglass Greater Rochester Intl Airport

Rochester, NY, US

On-Time Performance Chart

(using rounded numbers)
On-Time
34
67%
Late
2
4%
Very Late
4
8%
Excessive
6
12%
Cancelled
4
8%
Diverted
1
2%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
50
Total Delays ( > 1 min )
23
Codeshares
50
Average Delay (min.)
58.78260869565217
Standard Deviation
100.9
Min
0
Max
410

UA 4871 On-Time Performance Details

Overall Rating
0.4 of 5
Very Poor
Percentage On-Time 68%
Average Delay Time 58.78260869565217 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 0.4 shows that this flight has on-time performance characteristics better than 7% of all other flights in the FlightStats database.
On-Time Performance Rating
0.6 of 5
Poor
Percentage On-Time 68%
This flight has an on-time performance of 68%. 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
0.2 of 5
Very Poor
Average Delay Time 58.78260869565217 min
This flight has an average delay of 58.78260869565217 minutes with a standard deviation of 100.9 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 4% of other flights.