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(UA) United Airlines 9977 On-Time Performance Rating

Date Range:

15-Jan-2026 to 15-Mar-2026

(BRU) Brussels Airport

Brussels, BE

(MAD) Adolfo Suarez Madrid-Barajas Airport

Madrid, SP, ES

On-Time Performance Chart

(using rounded numbers)
On-Time
37
73%
Late
11
22%
Very Late
2
4%
Excessive
1
2%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
51
Total Delays ( > 1 min )
22
Codeshares
51
Average Delay (min.)
17.727272727272727
Standard Deviation
12.7
Min
0
Max
51

UA 9977 On-Time Performance Details

Overall Rating
2.9 of 5
Average
Percentage On-Time 73%
Average Delay Time 17.727272727272727 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.9 shows that this flight has on-time performance characteristics better than 56% of all other flights in the FlightStats database.
On-Time Performance Rating
1.2 of 5
Poor
Percentage On-Time 73%
This flight has an on-time performance of 73%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 24% of other flights.
Delay Performance
4.5 of 5
Good
Average Delay Time 17.727272727272727 min
This flight has an average delay of 17.727272727272727 minutes with a standard deviation of 12.7 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 90% of other flights.