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(UA) United Airlines 1577 On-Time Performance Rating

Date Range:

15-Jan-2026 to 15-Mar-2026

(RDU) Raleigh-Durham International Airport

Raleigh/Durham, NC, US

(ORD) Chicago O'Hare International Airport

Chicago, IL, US

On-Time Performance Chart

(using rounded numbers)
On-Time
7
70%
Late
1
10%
Very Late
0
0%
Excessive
1
10%
Cancelled
0
0%
Diverted
1
10%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
9
Total Delays ( > 1 min )
3
Codeshares
0
Average Delay (min.)
40.666666666666664
Standard Deviation
49.7
Min
0
Max
97

UA 1577 On-Time Performance Details

Overall Rating
2.4 of 5
Average
Percentage On-Time 78%
Average Delay Time 40.666666666666664 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.4 shows that this flight has on-time performance characteristics better than 47% of all other flights in the FlightStats database.
On-Time Performance Rating
2.9 of 5
Average
Percentage On-Time 78%
This flight has an on-time performance of 78%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 58% of other flights.
Delay Performance
1.9 of 5
Average
Average Delay Time 40.666666666666664 min
This flight has an average delay of 40.666666666666664 minutes with a standard deviation of 49.7 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 38% of other flights.

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