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(UA) United Airlines 1503 On-Time Performance Rating

Date Range:

15-Jun-2026 to 15-Aug-2026

(SEA) Seattle-Tacoma International Airport

Seattle, WA, US

(ORD) Chicago O'Hare International Airport

Chicago, IL, US

On-Time Performance Chart

(using rounded numbers)
On-Time
43
75%
Late
4
7%
Very Late
3
5%
Excessive
4
7%
Cancelled
1
2%
Diverted
2
4%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
55
Total Delays ( > 1 min )
17
Codeshares
0
Average Delay (min.)
52.588235294117645
Standard Deviation
67.9
Min
0
Max
221

UA 1503 On-Time Performance Details

Overall Rating
2.6 of 5
Average
Percentage On-Time 78%
Average Delay Time 52.588235294117645 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.6 shows that this flight has on-time performance characteristics better than 50% of all other flights in the FlightStats database.
On-Time Performance Rating
4.3 of 5
Good
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 86% of other flights.
Delay Performance
0.8 of 5
Poor
Average Delay Time 52.588235294117645 min
This flight has an average delay of 52.588235294117645 minutes with a standard deviation of 67.9 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 16% of other flights.

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