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(UA) United Airlines 635 On-Time Performance Rating

Date Range:

01-Jan-2026 to 28-Feb-2026

(IAD) Washington Dulles International Airport

Dulles, VA, US

(PBI) Palm Beach International Airport

West Palm Beach, FL, US

On-Time Performance Chart

(using rounded numbers)
On-Time
17
77%
Late
3
14%
Very Late
1
5%
Excessive
0
0%
Cancelled
0
0%
Diverted
1
5%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
21
Total Delays ( > 1 min )
5
Codeshares
0
Average Delay (min.)
18.8
Standard Deviation
10.3
Min
0
Max
30

UA 635 On-Time Performance Details

Overall Rating
3.6 of 5
Good
Percentage On-Time 81%
Average Delay Time 18.8 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 3.6 shows that this flight has on-time performance characteristics better than 71% of all other flights in the FlightStats database.
On-Time Performance Rating
3.6 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 73% of other flights.
Delay Performance
3.6 of 5
Good
Average Delay Time 18.8 min
This flight has an average delay of 18.8 minutes with a standard deviation of 10.3 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 73% of other flights.

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