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(UA) United Airlines 4939 On-Time Performance Rating

Date Range:

15-Jan-2026 to 15-Mar-2026

(ITH) Ithaca Tompkins International Airport

Ithaca, NY, US

(IAD) Washington Dulles International Airport

Dulles, VA, US

On-Time Performance Chart

(using rounded numbers)
On-Time
41
66%
Late
4
6%
Very Late
2
3%
Excessive
10
16%
Cancelled
3
5%
Diverted
2
3%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
60
Total Delays ( > 1 min )
23
Codeshares
60
Average Delay (min.)
92.8695652173913
Standard Deviation
148.2
Min
0
Max
633

UA 4939 On-Time Performance Details

Overall Rating
0.2 of 5
Very Poor
Percentage On-Time 68%
Average Delay Time 92.8695652173913 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 3% of all other flights in the FlightStats database.
On-Time Performance Rating
0.4 of 5
Very Poor
Percentage On-Time 68%
This flight has an on-time performance of 68%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 8% of other flights.
Delay Performance
0.0 of 5
Very Poor
Average Delay Time 92.8695652173913 min
This flight has an average delay of 92.8695652173913 minutes with a standard deviation of 148.2 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 0% of other flights.