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(UA) United Airlines 577 On-Time Performance Rating

Date Range:

01-Jan-2026 to 28-Feb-2026

(EWR) Newark Liberty International Airport

Newark, NJ, US

(BOS) Boston Logan International Airport

Boston, MA, US

On-Time Performance Chart

(using rounded numbers)
On-Time
42
79%
Late
2
4%
Very Late
1
2%
Excessive
5
9%
Cancelled
2
4%
Diverted
1
2%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
52
Total Delays ( > 1 min )
10
Codeshares
0
Average Delay (min.)
48.6
Standard Deviation
37.9
Min
0
Max
115

UA 577 On-Time Performance Details

Overall Rating
2.6 of 5
Average
Percentage On-Time 81%
Average Delay Time 48.6 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.6 shows that this flight has on-time performance characteristics better than 50% of all other flights in the FlightStats database.
On-Time Performance Rating
4.2 of 5
Good
Percentage On-Time 81%
This flight has an on-time performance of 81%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 84% of other flights.
Delay Performance
0.9 of 5
Poor
Average Delay Time 48.6 min
This flight has an average delay of 48.6 minutes with a standard deviation of 37.9 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 18% of other flights.

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