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(UA) United Airlines 639 On-Time Performance Rating

Date Range:

15-Jul-2026 to 15-Sep-2026

(BOS) Boston Logan International Airport

Boston, MA, US

(LAX) Los Angeles International Airport

Los Angeles, CA, US

On-Time Performance Chart

(using rounded numbers)
On-Time
12
41%
Late
2
7%
Very Late
5
17%
Excessive
10
34%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
29
Total Delays ( > 1 min )
24
Codeshares
0
Average Delay (min.)
53.75
Standard Deviation
54.2
Min
0
Max
204

UA 639 On-Time Performance Details

Overall Rating
0.2 of 5
Very Poor
Percentage On-Time 41%
Average Delay Time 53.75 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 0.2 shows that this flight has on-time performance characteristics better than 2% of all other flights in the FlightStats database.
On-Time Performance Rating
0.0 of 5
Very Poor
Percentage On-Time 41%
This flight has an on-time performance of 41%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 0% of other flights.
Delay Performance
0.3 of 5
Very Poor
Average Delay Time 53.75 min
This flight has an average delay of 53.75 minutes with a standard deviation of 54.2 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 7% of other flights.

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