(UA) United Airlines 1503 On-Time Performance Rating

Date Range:

01-Apr-2026 to 31-May-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

100%

Late

Very Late

Excessive

Cancelled

Diverted

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed

Total Delays ( > 1 min )

Codeshares

Average Delay (min.)

Standard Deviation

1.4

Min

Max

UA 1503 On-Time Performance Details

Overall Rating

4.2 of 5

Good

Percentage On-Time 100%

Average Delay Time 13 min

FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 4.2 shows that this flight has on-time performance characteristics better than 82% of all other flights in the FlightStats database.

On-Time Performance Rating

4.8 of 5

Very Good

Percentage On-Time 100%

This flight has an on-time performance of 100%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 96% of other flights.

Delay Performance

3.5 of 5

Average

Average Delay Time 13 min

This flight has an average delay of 13 minutes with a standard deviation of 1.4 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 69% of other flights.