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(UA) United Airlines 8557 On-Time Performance Rating

Date Range:

15-Jul-2025 to 15-Sep-2025

(DCA) Ronald Reagan Washington National Airport

Washington, DC, US

(YYZ) Toronto Pearson International Airport

Toronto, ON, CA

On-Time Performance Chart

(using rounded numbers)
On-Time
34
64%
Late
5
9%
Very Late
4
8%
Excessive
6
11%
Cancelled
2
4%
Diverted
2
4%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
51
Total Delays ( > 1 min )
22
Codeshares
51
Average Delay (min.)
30.454545454545453
Standard Deviation
25.4
Min
0
Max
79

UA 8557 On-Time Performance Details

Overall Rating
2.0 of 5
Average
Percentage On-Time 67%
Average Delay Time 30.454545454545453 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2 shows that this flight has on-time performance characteristics better than 39% of all other flights in the FlightStats database.
On-Time Performance Rating
0.7 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 14% of other flights.
Delay Performance
3.3 of 5
Average
Average Delay Time 30.454545454545453 min
This flight has an average delay of 30.454545454545453 minutes with a standard deviation of 25.4 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 66% of other flights.